Background

Kapiti Island is home to a dwindling colony of Tītī/Sooty shearwater. With almost no chicks recorded fledgling for the past 4 seasons, the current population is getting dangerously close to collapse. On Kapiti Island, the main reason for this steep decrease is depredation by weka on tītī chicks. Both species are critically important for the island ecosystem and the situation is creating a conservation conundrum with one taonga species depredating on another one.
Evolution of known active tītī burrows on Kapiti. Source: archive data, Etienne Ossona de Mendez

Impacts on weka need to be accounted for when designing management alternatives for the Declining Tītī/Sooty shearwater. This expert elicitation aims to estimate impacts, or lack thereof, on the Kapiti weka population associated with 12 proposed Tītī/Sooty shearwater management alternatives.

General background information

Kapiti island is 1965 ha.
Kapiti island was declared free of mammalian predators in 1999.
In the summer of 2025, the total weka population on Kapiti Island is estimated at approximately 2,800 birds (range: 2,600–3,000), accounting for uncertainties in territory mapping.
The weka population is considered to be at carrying capacity on Kapiti.
The weka population has a low breeding rate with an average clutch of 1-2 eggs and 0.3 young per pair per annum in 1987 (A.J. Beauchamp, 1987).
On average, weka territories on Kapiti are estimated to be between 1.7 ha and 2 ha.
On Kapiti, 30% of the weka population are non-territorial individuals or subadults.

Questionnaire

Status quo

Actions

Monitor the tītī colony

Additional information

Under status quo there is no weka management on Kapiti to protect tītī
> 90% of tītī chicks are depredated by weka in the first 3 weeks following hatching

How many adult weka do you think will be on Kapiti by 2050 under this management strategy?

Comments

Burrow modifications

Actions

Under the burrow modification management alternative 50 – 100 artificial tītī burrows would be installed at the tītī colony.
A weka exclusion flap would be placed on the entrance to each artificial burrow in early January and removed in early April.

How many adult weka do you think will be on Kapiti by 2050 under this management strategy?

Comments

Supplementary feeding of weka

Actions

Under the supplementary feeding alternative supplemental food would be provided to weka at 3 locations in the tītī colony (area of c.2.8 ha) from January through April. This is hypothesised to reduce tītī depredation by satiating weka with other food (suggested food is a combination of salmon pellets and semihard cheese).

Additional information

Kapiti weka breeding typically extends from August to December.
Kapiti weka heavily rely on invertebrates for food.
Kapiti weka population shows high variability in breeding success over the years.
The colony is located in terminal forests mainly of five-finger (Pseudopanax arboreus), tawa (Beilschmiedia tawa), kanono (Coprosma grandifolia) and kohekohe (Didymocheton spectabilis).

How many adult weka do you think will be on Kapiti by 2050 under this management strategy?

Comments

Weka fence

Actions

Under the weka fence alternative a fence would be placed around the tītī colony, excluding weka from an area of c.7.39 ha (the fence would be 1279 m long).
Upon creation, weka established within the fenced area are either killed or moved to a ferret-free area on the mainland within the rohe of Ngāti Toa Rangatira.
Upon creation, any overhanging vegetation within 3 m (either side of the fence) would need to be cleared.
Fenced area is monitored regularly to check for weka intrusion and overhanging vegetation.

How many adult weka do you think will be on Kapiti by 2050 under this management strategy?

Comments

Weka fence plus

Actions

Under the weka fence plus alternative a fence would be placed around the tītī colony, excluding weka from an area of c.7.39 ha (the fence would be 1279 m long).
Upon creation, weka established within the fenced area are either killed or moved to a ferret-free area on the mainland within the rohe of Ngāti Toa Rangatira.
Upon creation, any overhanging vegetation within 3 m (either side of the fence) would need to be cleared.
Fenced area is monitored regularly to check for weka intrusion and overhanging vegetation.
Speakers would also be used to play tītī calls at night to attract more tītī and boost recruitment at the colony.

How many adult weka do you think will be on Kapiti by 2050 under this management strategy?

Comments

Burrow modifications + supplementary feeding of weka

Actions

Under the burrow modifications + supplementary feeding of weka alternative, 50–100 artificial tītī burrows would be installed at the tītī colony.
A weka exclusion flap would be placed on artificial burrow entrances in early January and removed in early April.
Supplemental food would be provided to weka at three locations in the tītī colony (approximately 2.8 ha) from January through April. This is hypothesised to reduce tītī depredation by satiating weka with other food (suggested food is a combination of salmon pellets and semihard cheese).

Additional information

Kapiti weka breeding typically extends from August to December.
Kapiti weka heavily rely on invertebrates for food.
Kapiti weka population shows high variability in breeding success over the years.
The colony is located in terminal forests mainly composed of five-finger (Pseudopanax arboreus), tawa (Beilschmiedia tawa), kanono (Coprosma grandifolia), and kohekohe (Didymocheton spectabilis).

How many adult weka do you think will be on Kapiti by 2050 under this management strategy?

Comments

Weka deterrent

Actions

Under the weka deterrent alternative an olfactory based repellent such as peppermint essential oil would be dispensed during the day at 3 locations at the tītī colony (area of c. 2.8 ha) from January through April.
Audible repellents, such as karearea calls, would be played during the day at 3 locations at the tītī colony (area of c. 2.8 ha) from January through to April.
Concave mirrors would be put next to tītī burrows (n = 50 – 100) from January through to April.

How many adult weka do you think will be on Kapiti by 2050 under this management strategy?

Comments

Weka deterrent + supplementary feeding

Actions

Under the weka deterrent + supplementary feeding alternative feeding would be supplied at 3 locations at the tītī colony (area of c. 2.8 ha) from January through April.
Olfactory based repellents such as peppermint essential oil would be dispensed during the day at 3 locations at the tītī colony (area of c. 2.8 ha) from January through to April.
Audible repellents, such as karearea calls, would be played during the day at 3 locations at the tītī colony (area of c. 2.8 ha) from January through to April.
Concave mirrors should be put next to tītī burrows (n = 50 – 100) from January through to April.

Additional information

Kapiti weka breeding typically extends from August to December.
Kapiti weka heavily rely on invertebrates for food.
Kapiti weka population shows high variability in breeding success over the years.
The colony is located in terminal forests mainly of five-finger (Pseudopanax arboreus), tawa (Beilschmiedia tawa), kanono (Coprosma grandifolia) and kohekohe (Didymocheton spectabilis).

How many adult weka do you think will be on Kapiti by 2050 under this management strategy?

Comments

Burrow special

Actions

Under the burrow special management alternative 50 – 100 artificial tītī burrows would be installed at the tītī colony.
A weka exclusion flap would be placed on artificial burrow entries in early January and removed in early April.
From January through April, mana whenua would manually and daily block the entry of active tītī burrows (identified with chicks) pre-dawn and unblock pre dusk.
Olfactory based repellents such as peppermint essential oil would be dispensed during the day at 3 locations at the tītī colony (area of c. 2.8 ha) from January through to April.
Audible repellents, such as karearea calls, would be played during the day at 3 locations at the tītī colony (area of c.2.8 ha) from January through April.
Concave mirrors would be put next to tītī burrows (n = 50 – 100) from January through April.
Feeding would be supplied at 3 locations at the tītī colony (area of c.2.8 ha) from January through April. This is hypothesised to reduce tītī depredation by satiating weka with other food (suggested food is a combination of salmon pellets and semihard cheese).

Additional information

Kapiti weka breeding typically extends from August to December.
Kapiti weka heavily rely on invertebrates for food.
Kapiti weka population shows high variability in breeding success over the years.
The colony is located in terminal forests mainly of five-finger (Pseudopanax arboreus), tawa (Beilschmiedia tawa), kanono (Coprosma grandifolia) and kohekohe (Didymocheton spectabilis).

How many adult weka do you think will be on Kapiti by 2050 under this management strategy?

Comments

Select weka

Actions

Under the select weka alternative weka would be removed periodically (necessity based on observation) in early January and within a 250-meter radius of the colony. Selected weka are killed.

Additional information

Preliminary investigations show that weka that kill tītī are both territorial and non-territorial individuals established within a 250-meter radius of the colony.
Preliminary investigations (Stable isotope analysis and camera traps) show that weka that kill tītī are likely a group of 30 – 40 individuals.

How many adult weka do you think will be on Kapiti by 2050 under this management strategy?

Comments

Select weka + burrow modification

Actions

Under the select weka alternative weka would be removed periodically (necessity based on observation) in early January and within a 250-meter radius of the colony. Selected weka are killed.
50 – 100 artificial tītī burrows would be installed at the tītī colony.
A weka exclusion flap would be placed on artificial burrow entries in early January and removed in early April.

Additional information

Preliminary investigations show that weka that kill tītī are both territorial and non-territorial individuals established within a 250-meter radius of the colony.
Preliminary investigations (Stable isotope analysis and camera traps) show that weka that kill tītī are likely a group of 30 – 40 individuals.

How many adult weka do you think will be on Kapiti by 2050 under this management strategy?

Comments

Translocate weka

Actions

Under the translocate weka alternative there would be an annual translocation in early January of all weka within a 250-meter radius of the colony (30-40 individuals). These birds would be moved off Kapiti Island and released at a ferret-free site on the mainland within the rohe of Ngāti Toa Rangatira.

How many adult weka do you think will be on Kapiti by 2050 under this management strategy?

Comments

Tītī town

Actions

Under the tītī town alternative a weka exclusion fenced area with artificial burrows would be established at a new location on Kapiti Island. Tītī chicks from Tuteremoana and other locations would be translocated to this site annually.
Upon creation, weka established within the fenced area are either killed or moved to a ferret-free area on the mainland and within the rohe of Ngāti Toa Rangatira.
Fenced area is monitored regularly to check for weka intrusion.
Speakers would also be used to play tītī calls at night to attract more tītī and boost recruitment at the colony.

Additional information

Translocation site should be located in seral forest and cover an area of similar size to the current tītī colony (c.2.8 ha). By seral forest we mean a stage of earlier succession forest, following disturbance (clearance), characterized by transitional plant communities such as kanuka scrub, flax tussocklands, five fingers, heketara, lancewood, mahoe and mingimingi shrublands. Chosen site would be in a more accessible location than the current colony.

How many adult weka do you think will be on Kapiti by 2050 under this management strategy?

Comments

Answers by species

The following 0 species were not assessed by any of the experts:

The results for the assessed species are below:

Goldstripe gecko (Woodworthia chrysosiretica)

Action	Expert	Impact	Minimum Plausible	Most Likely	Maximum Plausible	Confidence
Status Quo	GE	Yes	2	5	15	80
	HJ	Yes	0	25	50	50
	BT	No	0	0	0	100
	GZ	No	0	0	0	100
	NR	Yes	20	20	40	30
Burrow modifications	GE	Yes	2	5	15	80
	HJ	Yes	0	25	50	50
	BT	No	0	0	0	100
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Supplementary feeding of weka	GE	Yes	2	5	15	80
	HJ	Yes	0	30	50	100
	BT	No	0	0	0	100
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Weka fence	BT	Yes	0	10	100	100
	GE	Yes	2	3	7	70
	HJ	Yes	0	25	50	50
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Weka fence plus	BT	Yes	0	10	100	100
	GE	Yes	2	3	7	70
	HJ	Yes	0	25	50	50
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Burrow modifications + supplementary feeding of weka	GE	Yes	2	5	15	80
	HJ	Yes	0	30	50	100
	BT	No	0	0	0	100
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Weka deterrent	GE	Yes	2	5	15	80
	BT	No	0	0	0	100
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Weka deterrent + supplementary feeding	GE	Yes	2	5	15	80
	BT	No	0	0	0	100
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Burrow special	GE	Yes	2	5	15	80
	BT	No	0	0	0	100
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Select weka + burrow modification	BT	Yes	0	5	50	100
	GE	Yes	2	5	15	80
	HJ	Yes	0	20	50	50
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Translocate weka	BT	Yes	0	5	50	100
	GE	Yes	2	5	15	80
	HJ	Yes	0	20	50	50
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Tītī town	BT	Yes	0	10	100	100
	GE	Yes	2	3	7	70
	HJ	Yes	0	25	50	50
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100

Comments

Status Quo

HJ:Weka eat

Burrow modifications

HJ:Weka eat

Supplementary feeding of weka

HJ:more weka

Weka fence

HJ:Weka eat BT:Not negatively impacted, but positively. If present at the site, the population could grow substantially by 2050. All answers are % of growth, not decline/extinction

Weka fence plus

HJ:Weka eat BT:Not negatively impacted, but positively. If present at the site, the population could grow substantially by 2050. All answers are % of growth, not decline/extinction

Burrow modifications + supplementary feeding of weka

HJ:more weka

Select weka + burrow modification

BT:Not negatively impacted, but positively. If present at the site, the population could grow substantially by 2050 if released from weka predation locally. All answers are % of growth, not decline/extinction. HJ:Weka few

Translocate weka

Tītī town

BT:Not negatively impacted, but positively. If present at the site, the population could grow substantially by 2050. All answers are % of growth, not decline/extinction HJ:Weka eat

Wellington green barking gecko (Naultinus punctatus)

Action	Expert	Impact	Minimum Plausible	Most Likely	Maximum Plausible	Confidence
Status Quo	HJ	Yes	0	25	50	50
	BT	No	0	0	0	100
	GZ	No	0	0	0	100
	NR	Yes	5	1	20	20
Burrow modifications	HJ	Yes	0	25	50	50
	BT	No	0	0	0	100
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Supplementary feeding of weka	GZ	Yes	0	2	10	60
	HJ	Yes	0	30	50	100
	BT	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Weka fence	BT	Yes	0	10	100	100
	HJ	Yes	0	25	50	50
	HV	No	0	0	0	100
	NR	No	0	0	0	100
	GZ	Yes	0	0	0	100
Weka fence plus	BT	Yes	0	10	100	100
	HJ	Yes	0	25	50	50
	HV	No	0	0	0	100
	NR	No	0	0	0	100
	GZ	Yes	0	0	0	100
Burrow modifications + supplementary feeding of weka	GZ	Yes	0	2	10	60
	HJ	Yes	0	30	50	100
	BT	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Weka deterrent	GZ	Yes	0	0	5	90
	BT	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Weka deterrent + supplementary feeding	GZ	Yes	0	2	10	60
	BT	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Burrow special	BT	No	0	0	0	100
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Select weka + burrow modification	BT	Yes	0	5	50	100
	HJ	Yes	0	20	50	50
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Translocate weka	BT	Yes	0	5	50	100
	HJ	Yes	0	20	50	50
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Tītī town	BT	Yes	0	10	100	100
	HJ	Yes	0	25	50	50
	HV	No	0	0	0	100
	NR	No	0	0	0	100
	GZ	Yes	0	0	0	100

Comments

Status Quo

HJ:Weka eat

Burrow modifications

HJ:Weka eat

Supplementary feeding of weka

HJ:more weka

Weka fence

HJ:Weka eat BT:Not negatively impacted, but positively. If present at the site, the population could grow substantially by 2050. All answers are % of growth, not decline/extinction GZ:+ve fx

Weka fence plus

BT:Not negatively impacted, but positively. If present at the site, the population could grow substantially by 2050. All answers are % of growth, not decline/extinction GZ:+ve fx HJ:Weka eat

Burrow modifications + supplementary feeding of weka

HJ:more weka

Weka deterrent

GZ:pm oil

Select weka + burrow modification

Translocate weka

Tītī town

GZ:+ve fx BT:Not negatively impacted, but positively. If present at the site, the population could grow substantially by 2050. All answers are % of growth, not decline/extinction HJ:Weka eat

Copper skink (Oligosoma aeneum)

Action	Expert	Impact	Minimum Plausible	Most Likely	Maximum Plausible	Confidence
Status Quo	GE	Yes	2	3	10	85
	HJ	Yes	0	25	50	50
	BT	No	0	0	0	100
	GZ	No	0	0	0	100
	NR	Yes	30	30	50	20
Burrow modifications	GE	Yes	2	3	10	85
	HJ	Yes	0	25	50	50
	BT	No	0	0	0	100
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Supplementary feeding of weka	GE	Yes	2	3	10	85
	HJ	Yes	0	30	50	100
	BT	No	0	0	0	100
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Weka fence	BT	Yes	0	50	100	100
	GE	Yes	2	2	5	70
	HJ	Yes	0	25	50	50
	HV	No	0	0	0	100
	NR	No	0	0	0	100
	GZ	Yes	0	0	0	100
Weka fence plus	BT	Yes	0	50	100	100
	GE	Yes	2	2	5	70
	HJ	Yes	0	25	50	50
	HV	No	0	0	0	100
	NR	No	0	0	0	100
	GZ	Yes	0	0	0	100
Burrow modifications + supplementary feeding of weka	GE	Yes	2	3	10	85
	HJ	Yes	0	30	50	100
	BT	No	0	0	0	100
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Weka deterrent	GE	Yes	2	3	10	85
	GZ	Yes	0	0	5	90
	BT	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Weka deterrent + supplementary feeding	GE	Yes	2	3	10	85
	BT	No	0	0	0	100
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Burrow special	GE	Yes	2	3	10	85
	BT	No	0	0	0	100
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Select weka + burrow modification	BT	Yes	0	10	50	100
	GE	Yes	2	3	10	85
	HJ	Yes	0	20	50	50
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Translocate weka	BT	Yes	0	10	50	100
	GE	Yes	2	3	10	85
	HJ	Yes	0	20	50	50
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Tītī town	BT	Yes	0	50	100	100
	GE	Yes	2	2	5	70
	HJ	Yes	0	25	50	50
	HV	No	0	0	0	100
	NR	No	0	0	0	100
	GZ	Yes	0	0	0	100

Comments

Status Quo

HJ:Weka eat

Burrow modifications

HJ:Weka eat

Supplementary feeding of weka

HJ:more weka

Weka fence

GZ:+ve fx BT:Not negatively impacted, but positively. If present at the site, the population could grow substantially by 2050. All answers are % of growth, not decline/extinction HJ:Weka eat

Weka fence plus

GZ:+ve fx HJ:Weka eat BT:Not negatively impacted, but positively. If present at the site, the population could grow substantially by 2050. All answers are % of growth, not decline/extinction

Burrow modifications + supplementary feeding of weka

HJ:more weka

Weka deterrent

GZ:pm oil

Select weka + burrow modification

HJ:Weka few BT:Not negatively impacted, but positively. If present at the site, the population could grow substantially by 2050 if released from weka predation locally. All answers are % of growth, not decline/extinction.

Translocate weka

Tītī town

BT:Not negatively impacted, but positively. If present at the site, the population could grow substantially by 2050. All answers are % of growth, not decline/extinction GZ:+ve fx HJ:Weka eat

Ornate skin (Oligosoma ornatum)

Action	Expert	Impact	Minimum Plausible	Most Likely	Maximum Plausible	Confidence
Status Quo	GE	Yes	5	10	30	85
	HJ	Yes	0	25	50	50
	BT	No	0	0	0	100
	GZ	No	0	0	0	100
	NR	Yes	30	30	50	20
	TI	Yes	0	0	0	100
Burrow modifications	GE	Yes	5	10	30	85
	HJ	Yes	0	25	50	50
	BT	No	0	0	0	100
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Supplementary feeding of weka	GE	Yes	5	10	30	85
	GZ	Yes	0	5	10	60
	HJ	Yes	0	30	50	100
	BT	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Weka fence	BT	Yes	0	50	100	100
	GE	Yes	5	5	15	75
	HJ	Yes	0	25	50	50
	HV	No	0	0	0	100
	NR	No	0	0	0	100
	GZ	Yes	0	0	0	100
Weka fence plus	BT	Yes	0	50	100	100
	GE	Yes	5	5	15	75
	HJ	Yes	0	25	50	50
	HV	No	0	0	0	100
	NR	No	0	0	0	100
	GZ	Yes	0	0	0	100
Burrow modifications + supplementary feeding of weka	GE	Yes	5	10	30	85
	GZ	Yes	0	5	10	60
	HJ	Yes	0	30	50	100
	BT	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Weka deterrent	GE	Yes	5	10	30	85
	GZ	Yes	0	1	5	80
	BT	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Weka deterrent + supplementary feeding	GE	Yes	5	10	30	85
	GZ	Yes	0	5	10	60
	BT	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Burrow special	GE	Yes	5	10	30	85
	BT	No	0	0	0	100
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Select weka + burrow modification	BT	Yes	0	10	50	100
	GE	Yes	5	10	30	85
	HJ	Yes	0	20	50	50
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Translocate weka	BT	Yes	0	10	50	100
	GE	Yes	5	10	30	85
	HJ	Yes	0	20	50	50
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Tītī town	BT	Yes	0	50	100	100
	GE	Yes	5	5	15	75
	HJ	Yes	0	25	50	50
	GZ	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100

Comments

Status Quo

HJ:Weka eat

Burrow modifications

HJ:Weka eat

Supplementary feeding of weka

HJ:more weka

Weka fence

GZ:+ve fx HJ:Weka eat BT:Not negatively impacted, but positively. If present at the site, the population could grow substantially by 2050. All answers are % of growth, not decline/extinction

Weka fence plus

BT:Not negatively impacted, but positively. If present at the site, the population could grow substantially by 2050. All answers are % of growth, not decline/extinction GZ:+ve fx HJ:Weka eat

Burrow modifications + supplementary feeding of weka

HJ:more weka

Weka deterrent

GZ:pm oil

Select weka + burrow modification

Translocate weka

Tītī town

BT:Not negatively impacted, but positively. If present at the site, the population could grow substantially by 2050. All answers are % of growth, not decline/extinction GZ:+ve fx HJ:Weka eat

Southern brown kiwi (Apteryx australis “Haast”)

Action	Expert	Impact	Minimum Plausible	Most Likely	Maximum Plausible	Confidence
Status Quo	NR	Yes	0	0	1	50
	BT	No	0	0	0	100
	GE	No	0	0	0	100
	RG	No	0	0	0	100
Burrow modifications	BT	No	0	0	0	100
	GE	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Supplementary feeding of weka	BT	No	0	0	0	100
	GE	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Weka fence	BT	Yes	10	30	70	95
	GE	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Weka fence plus	BT	Yes	10	30	70	95
	GE	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Burrow modifications + supplementary feeding of weka	BT	No	0	0	0	100
	GE	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Weka deterrent	GE	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
	BT	Yes	0	0	0	100
Weka deterrent + supplementary feeding	GE	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
	BT	Yes	0	0	0	100
Burrow special	GE	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
	BT	Yes	0	0	0	100
Select weka + burrow modification	GE	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
	BT	No	10	30	70	95
Translocate weka	GE	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
	BT	No	10	30	70	95
Tītī town	GE	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
	BT	No	10	30	70	95

Comments

Weka fence

BT:Individuals could be fenced in leading to separation and inbreeding. Species already incredibly rare on Kapiti so 10% is the back ground extinction rate

Weka fence plus

BT:Individuals could be fenced in leading to separation and inbreeding. Species already incredibly rare on Kapiti so 10% is the back ground extinction rate

Weka deterrent

BT:Disturbance but not anywhere near extinction

Weka deterrent + supplementary feeding

BT:Disturbance but not anywhere near extinction

Burrow special

BT:Disturbance but not anywhere near extinction

Select weka + burrow modification

BT:Individuals could be fenced in leading to separation and inbreeding. Species already incredibly rare on Kapiti so 10% is the back ground extinction rate

Translocate weka

BT:Individuals could be fenced in leading to separation and inbreeding. Species already incredibly rare on Kapiti so 10% is the back ground extinction rate

Tītī town

BT:Individuals could be fenced in leading to separation and inbreeding. Species already incredibly rare on Kapiti so 10% is the back ground extinction rate

Little spotted kiwi (Apteryx owenii)

Action	Expert	Impact	Maximum Plausible	Confidence
Status Quo	NR	Yes	1	50
	BT	No	0	100
	GE	No	0	100
	RG	No	0	100
	TI	Yes	0	100
Burrow modifications	BT	No	0	100
	GE	No	0	100
	HV	No	0	100
	NR	No	0	100
Supplementary feeding of weka	BT	No	0	100
	GE	No	0	100
	HV	No	0	100
	NR	No	0	100
Weka fence	GE	No	0	100
	HV	No	0	100
	NR	No	0	100
	BT	Yes	0	95
Weka fence plus	GE	No	0	100
	HV	No	0	100
	NR	No	0	100
	BT	Yes	0	95
Burrow modifications + supplementary feeding of weka	BT	No	0	100
	GE	No	0	100
	HV	No	0	100
	NR	No	0	100
Weka deterrent	GE	No	0	100
	HV	No	0	100
	NR	No	0	100
	BT	Yes	0	100
Weka deterrent + supplementary feeding	GE	No	0	100
	HV	No	0	100
	NR	No	0	100
	BT	Yes	0	100
Burrow special	GE	No	0	100
	HV	No	0	100
	NR	No	0	100
	BT	Yes	0	100
Select weka + burrow modification	GE	No	0	100
	HV	No	0	100
	NR	No	0	100
	BT	No	0	95
Translocate weka	GE	No	0	100
	HV	No	0	100
	NR	No	0	100
	BT	No	0	95
Tītī town	GE	No	0	100
	HV	No	0	100
	NR	No	0	100
	BT	Yes	0	95

Comments

Weka fence

BT:Individuals could be fenced in leading to separation and further inbreeding, but nowhere near extinction for this species

Weka fence plus

BT:Individuals could be fenced in leading to separation and further inbreeding, but nowhere near extinction for this species

Weka deterrent

BT:Disturbance but not anywhere near extinction

Weka deterrent + supplementary feeding

BT:Disturbance but not anywhere near extinction

Burrow special

BT:Disturbance but not anywhere near extinction

Select weka + burrow modification

BT:Individuals could be fenced in leading to separation and further inbreeding, but nowhere near extinction for this species

Translocate weka

BT:Individuals could be fenced in leading to separation and further inbreeding, but nowhere near extinction for this species

Tītī town

BT:Individuals could be fenced in leading to separation and further inbreeding, but nowhere near extinction for this species

Hihi (Notiomystis cincta)

Action	Expert	Impact	Confidence
Status Quo	BT	No	100
	GE	No	100
	GZ	No	100
	HV	No	100
	NR	No	100
	RG	No	100
	TI	No	100
Burrow modifications	BT	No	100
	GE	No	100
	GZ	No	100
	HV	No	100
	NR	No	100
Supplementary feeding of weka	BT	No	100
	GE	No	100
	GZ	No	100
	HV	No	100
	NR	No	100
Weka fence	BT	No	100
	GE	No	100
	GZ	No	100
	HV	No	100
	NR	No	100
Weka fence plus	BT	No	100
	GE	No	100
	GZ	No	100
	HV	No	100
	NR	No	100
Burrow modifications + supplementary feeding of weka	BT	No	100
	GE	No	100
	GZ	No	100
	HV	No	100
	NR	No	100
Weka deterrent	GE	No	100
	GZ	No	100
	HV	No	100
	NR	No	100
	BT	Yes	100
Weka deterrent + supplementary feeding	GE	No	100
	GZ	No	100
	HV	No	100
	NR	No	100
	BT	Yes	100
Burrow special	GE	No	100
	GZ	No	100
	HV	No	100
	NR	No	100
	BT	Yes	100
Select weka + burrow modification	BT	No	100
	GE	No	100
	GZ	No	100
	HV	No	100
	NR	No	100
Translocate weka	BT	No	100
	GE	No	100
	GZ	No	100
	HV	No	100
	NR	No	100
Tītī town	BT	No	100
	GE	No	100
	GZ	No	100
	HV	No	100
	NR	No	100

Comments

Weka deterrent

BT:calls cause distrubance

Weka deterrent + supplementary feeding

BT:calls cause distrubance

Burrow special

BT:calls cause distrubance

North island kokako (Callaeas wilsoni)

Action	Expert	Impact	Confidence
Status Quo	BT	No	100
	GE	No	100
	GZ	No	100
	HV	No	100
	NR	No	100
	RG	No	100
	TI	Yes	100
Burrow modifications	BT	No	100
	GE	No	100
	GZ	No	100
	HV	No	100
	NR	No	100
Supplementary feeding of weka	BT	No	100
	GE	No	100
	GZ	No	100
	HV	No	100
	NR	No	100
Weka fence	BT	No	100
	GE	No	100
	GZ	No	100
	HV	No	100
	NR	No	100
Weka fence plus	BT	No	100
	GE	No	100
	GZ	No	100
	HV	No	100
	NR	No	100
Burrow modifications + supplementary feeding of weka	BT	No	100
	GE	No	100
	GZ	No	100
	NR	No	100
Weka deterrent	GE	No	100
	GZ	No	100
	HV	No	100
	NR	No	100
	BT	Yes	100
Weka deterrent + supplementary feeding	GE	No	100
	GZ	No	100
	HV	No	100
	NR	No	100
	BT	Yes	100
Burrow special	GE	No	100
	GZ	No	100
	HV	No	100
	NR	No	100
	BT	Yes	100
Select weka + burrow modification	BT	No	100
	GE	No	100
	GZ	No	100
	NR	No	100
Translocate weka	BT	No	100
	GE	No	100
	GZ	No	100
	NR	No	100
Tītī town	BT	No	100
	GE	No	100
	GZ	No	100
	HV	No	100
	NR	No	100

Comments

Weka deterrent

BT:calls cause distrubance

Weka deterrent + supplementary feeding

BT:calls cause distrubance

Burrow special

BT:calls cause distrubance

New Zealand Falcon (Falco novaeseelandiae ferox)

Action	Expert	Impact	Maximum Plausible	Confidence
Status Quo	BT	No	0	100
	BW	No	0	100
	GE	No	0	100
	HV	No	0	100
	RG	No	0	100
	NR	Yes	5	30
Burrow modifications	BT	No	0	100
	BW	No	0	100
	GE	No	0	100
	HV	No	0	100
	NR	No	0	100
Supplementary feeding of weka	BT	No	0	100
	BW	No	0	100
	GE	No	0	100
	HV	No	0	100
	NR	No	0	100
Weka fence	BT	No	0	100
	BW	No	0	100
	GE	No	0	100
	HV	No	0	100
	NR	No	0	100
Weka fence plus	BT	No	0	100
	BW	No	0	100
	GE	No	0	100
	HV	No	0	100
	NR	No	0	100
Burrow modifications + supplementary feeding of weka	BT	No	0	100
	BW	No	0	100
	GE	No	0	100
	NR	No	0	100
Weka deterrent	BW	No	0	100
	GE	No	0	100
	HV	No	0	100
	NR	No	0	100
	BT	Yes	0	100
Weka deterrent + supplementary feeding	BW	No	0	100
	GE	No	0	100
	HV	No	0	100
	NR	No	0	100
	BT	Yes	0	100
Burrow special	BW	No	0	100
	GE	No	0	100
	HV	No	0	100
	NR	No	0	100
	BT	Yes	0	100
Select weka + burrow modification	BT	No	0	100
	BW	No	0	100
	GE	No	0	100
	NR	No	0	100
Translocate weka	BT	No	0	100
	BW	No	0	100
	GE	No	0	100
	NR	No	0	100
Tītī town	BT	No	0	100
	BW	No	0	100
	GE	No	0	100
	HV	No	0	100
	NR	No	0	100

Comments

Weka deterrent

BT:calls cause distrubance

Weka deterrent + supplementary feeding

BT:calls cause distrubance

Burrow special

BT:calls cause distrubance

Long-tailed bat (Chalinolobus tuberculatus)

Action	Expert	Impact	Confidence
Status Quo	BT	No	100
	GE	No	100
	HJ	No	100
	HV	No	100
	NR	No	100
Burrow modifications	BT	No	100
	GE	No	100
	HJ	No	100
	HV	No	100
	NR	No	100
Supplementary feeding of weka	BT	No	100
	GE	No	100
	HJ	No	100
	HV	No	100
	NR	No	100
Weka fence	BT	No	100
	GE	No	100
	HJ	No	100
	HV	No	100
	NR	No	100
Weka fence plus	BT	No	100
	GE	No	100
	HJ	No	100
	HV	No	100
	NR	No	100
Burrow modifications + supplementary feeding of weka	BT	No	100
	GE	No	100
	HJ	No	100
	NR	No	100
Weka deterrent	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
Weka deterrent + supplementary feeding	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
Burrow special	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
Select weka + burrow modification	BT	No	100
	GE	No	100
	HJ	No	100
	NR	No	100
Translocate weka	BT	No	100
	GE	No	100
	HJ	No	100
	NR	No	100
Tītī town	BT	No	100
	GE	No	100
	HJ	No	100
	HV	No	100
	NR	No	100

Comments

Kapiti ground weta (Hemiandrus merope)

Action	Expert	Impact	Minimum Plausible	Most Likely	Maximum Plausible	Confidence
Status Quo	BW	Yes	0.1	2	5	75
	HJ	Yes	0.0	25	50	50
	NR	Yes	5.0	40	50	50
	GE	No	0.0	0	0	100
	HV	Yes	33.0	25	50	10
Burrow modifications	BW	Yes	0.1	2	5	75
	HJ	Yes	0.0	25	50	50
	GE	No	0.0	0	0	100
	HV	No	0.0	0	0	100
	NR	No	0.0	0	0	100
Supplementary feeding of weka	BW	Yes	0.2	3	5	50
	HJ	Yes	0.0	30	50	100
	GE	No	0.0	0	0	100
	HV	No	0.0	0	0	100
	NR	No	0.0	0	0	100
Weka fence	BW	Yes	0.1	2	5	75
	HJ	Yes	0.0	25	50	50
	GE	No	0.0	0	0	100
	HV	No	0.0	0	0	100
Weka fence plus	BW	Yes	0.1	2	5	75
	HJ	Yes	0.0	25	50	50
	GE	No	0.0	0	0	100
	HV	No	0.0	0	0	100
	NR	No	0.0	0	0	100
Burrow modifications + supplementary feeding of weka	BW	Yes	0.2	3	5	50
	HJ	Yes	0.0	30	50	100
	GE	No	0.0	0	0	100
	NR	No	0.0	0	0	100
Weka deterrent	BW	Yes	0.1	2	5	75
	GE	No	0.0	0	0	100
	HV	No	0.0	0	0	100
	NR	No	0.0	0	0	100
Weka deterrent + supplementary feeding	BW	Yes	0.2	3	5	50
	GE	No	0.0	0	0	100
	HV	No	0.0	0	0	100
	NR	No	0.0	0	0	100
Burrow special	BW	Yes	0.2	3	5	50
	GE	No	0.0	0	0	100
	HV	No	0.0	0	0	100
	NR	No	0.0	0	0	100
Select weka + burrow modification	BW	Yes	0.1	2	5	75
	HJ	Yes	0.0	20	50	50
	GE	No	0.0	0	0	100
	NR	No	0.0	0	0	100
Translocate weka	BW	Yes	0.1	2	5	75
	HJ	Yes	0.0	20	50	50
	GE	No	0.0	0	0	100
	NR	No	0.0	0	0	100
Tītī town	BW	Yes	0.1	2	5	75
	HJ	Yes	0.0	25	50	50
	GE	No	0.0	0	0	100
	HV	No	0.0	0	0	100
	NR	No	0.0	0	0	100

Comments

Status Quo

HV:Intuitive HJ:Weka eat

Burrow modifications

HJ:Weka eat

Supplementary feeding of weka

HJ:more weka

Weka fence

HJ:Weka eat

Weka fence plus

HJ:Weka eat

Burrow modifications + supplementary feeding of weka

HJ:more weka

Select weka + burrow modification

HJ:Weka few

Translocate weka

HJ:Weka few

Tītī town

HJ:Weka eat

Pūriri moth (Aenetus virescens)

Action	Expert	Impact	Minimum Plausible	Most Likely	Maximum Plausible	Confidence
Status Quo	BW	Yes	0.01	0.01	1	75
	HJ	Yes	0.00	25.00	50	50
	GE	No	0.00	0.00	0	100
	HV	No	0.00	0.00	0	100
	NR	No	0.00	0.00	0	100
Burrow modifications	BW	Yes	0.01	0.01	1	75
	HJ	Yes	0.00	25.00	50	50
	GE	No	0.00	0.00	0	100
	HV	No	0.00	0.00	0	100
	NR	No	0.00	0.00	0	100
Supplementary feeding of weka	BW	Yes	0.01	0.01	1	75
	HJ	Yes	0.00	30.00	50	100
	GE	No	0.00	0.00	0	100
	HV	No	0.00	0.00	0	100
	NR	No	0.00	0.00	0	100
Weka fence	BW	Yes	0.01	0.01	1	75
	HJ	Yes	0.00	25.00	50	50
	GE	No	0.00	0.00	0	100
	HV	No	0.00	0.00	0	100
	NR	No	0.00	0.00	0	100
Weka fence plus	BW	Yes	0.01	0.01	1	75
	HJ	Yes	0.00	25.00	50	50
	GE	No	0.00	0.00	0	100
	HV	No	0.00	0.00	0	100
	NR	No	0.00	0.00	0	100
Burrow modifications + supplementary feeding of weka	BW	Yes	0.01	0.01	1	75
	HJ	Yes	0.00	30.00	50	100
	GE	No	0.00	0.00	0	100
	NR	No	0.00	0.00	0	100
Weka deterrent	BW	Yes	0.01	0.01	1	75
	GE	No	0.00	0.00	0	100
	HV	No	0.00	0.00	0	100
	NR	No	0.00	0.00	0	100
Weka deterrent + supplementary feeding	BW	Yes	0.01	0.01	1	75
	GE	No	0.00	0.00	0	100
	HV	No	0.00	0.00	0	100
	NR	No	0.00	0.00	0	100
Burrow special	BW	Yes	0.01	0.01	1	75
	GE	No	0.00	0.00	0	100
	HV	No	0.00	0.00	0	100
	NR	No	0.00	0.00	0	100
Select weka + burrow modification	BW	Yes	0.01	0.01	1	75
	HJ	Yes	0.00	20.00	50	50
	GE	No	0.00	0.00	0	100
	NR	No	0.00	0.00	0	100
Translocate weka	BW	Yes	0.01	0.01	1	75
	HJ	Yes	0.00	20.00	50	50
	GE	No	0.00	0.00	0	100
	NR	No	0.00	0.00	0	100
Tītī town	BW	Yes	0.01	0.01	1	75
	HJ	Yes	0.00	25.00	50	50
	GE	No	0.00	0.00	0	100
	HV	No	0.00	0.00	0	100
	NR	No	0.00	0.00	0	100

Comments

Status Quo

HJ:Weka eat BW:Pūriri moth should not be impacted by weka

Burrow modifications

HJ:Weka eat BW:Pūriri moth should not be impacted by weka

Supplementary feeding of weka

HJ:more weka

Weka fence

BW:Pūriri moth should not be impacted by weka HJ:Weka eat

Weka fence plus

HJ:Weka eat BW:Pūriri moth should not be impacted by weka

Burrow modifications + supplementary feeding of weka

HJ:more weka

Weka deterrent

BW:Pūriri moth should not be impacted by weka

Select weka + burrow modification

BW:Pūriri moth should not be impacted by weka HJ:Weka few

Translocate weka

BW:Pūriri moth should not be impacted by weka HJ:Weka few

Tītī town

HJ:Weka eat BW:Pūriri moth should not be impacted by weka

New Zealand reticulate stag beetle (Paralissotes reticulatus)

Action	Expert	Impact	Minimum Plausible	Most Likely	Maximum Plausible	Confidence
Status Quo	BW	Yes	1	3	10	50
	HJ	Yes	0	25	50	50
	NR	Yes	0	40	50	50
	GE	No	0	0	0	100
	HV	No	33	25	50	10
Burrow modifications	BW	Yes	1	3	10	50
	HJ	Yes	0	25	50	50
	GE	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Supplementary feeding of weka	BW	Yes	2	5	10	50
	HJ	Yes	0	30	50	100
	GE	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Weka fence	BW	Yes	1	3	10	50
	HJ	Yes	0	25	50	50
	GE	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Weka fence plus	BW	Yes	1	3	10	50
	HJ	Yes	0	25	50	50
	GE	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Burrow modifications + supplementary feeding of weka	BW	Yes	2	5	10	50
	HJ	Yes	0	30	50	100
	GE	No	0	0	0	100
	NR	No	0	0	0	100
Weka deterrent	BW	Yes	1	3	10	50
	GE	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Weka deterrent + supplementary feeding	BW	Yes	2	5	10	50
	GE	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Burrow special	BW	Yes	2	5	10	50
	GE	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100
Select weka + burrow modification	BW	Yes	1	3	10	50
	HJ	Yes	0	20	50	50
	GE	No	0	0	0	100
	NR	No	0	0	0	100
Translocate weka	BW	Yes	1	3	10	50
	HJ	Yes	0	20	50	50
	GE	No	0	0	0	100
	NR	No	0	0	0	100
Tītī town	BW	Yes	1	3	10	50
	HJ	Yes	0	25	50	50
	GE	No	0	0	0	100
	HV	No	0	0	0	100
	NR	No	0	0	0	100

Comments

Status Quo

HJ:Weka eat

Burrow modifications

HJ:Weka eat

Supplementary feeding of weka

HJ:more weka

Weka fence

HJ:Weka eat

Weka fence plus

HJ:Weka eat

Burrow modifications + supplementary feeding of weka

HJ:more weka

Select weka + burrow modification

HJ:Weka few

Translocate weka

HJ:Weka few

Tītī town

HJ:Weka eat

Northern rata (Metrosideros robusta)

Action	Expert	Impact	Confidence
Status Quo	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Burrow modifications	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Supplementary feeding of weka	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Weka fence	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
	BT	Yes	100
Weka fence plus	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
	BT	Yes	100
Burrow modifications + supplementary feeding of weka	BT	No	100
	GE	No	100
	NR	No	100
	QN	No	100
Weka deterrent	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Weka deterrent + supplementary feeding	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Burrow special	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Select weka + burrow modification	BT	No	100
	GE	No	100
	NR	No	100
	QN	No	100
Translocate weka	BT	No	100
	GE	No	100
	NR	No	100
	QN	No	100
Tītī town	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
	BT	Yes	100

Comments

Weka fence

BT:A significant amount of trees will need to be cut for a fence, but none of this will cause extinctions

Weka fence plus

BT:A significant amount of trees will need to be cut for a fence, but none of this will cause extinctions

Select weka + burrow modification

BT:A significant amount of trees will need to be cut for a fence, but none of this will cause extinctions

Translocate weka

BT:A significant amount of trees will need to be cut for a fence, but none of this will cause extinctions

Tītī town

BT:Some trees will need to be cut for a fence, but none of this will cause extinctions

New Zealand linen flax (rauhuia), (Linum monogynum)

Action	Expert	Impact	Confidence
Status Quo	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Burrow modifications	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Supplementary feeding of weka	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Weka fence	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Weka fence plus	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Burrow modifications + supplementary feeding of weka	BT	No	100
	GE	No	100
	NR	No	100
	QN	No	100
Weka deterrent	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Weka deterrent + supplementary feeding	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Burrow special	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Select weka + burrow modification	BT	No	100
	GE	No	100
	NR	No	100
	QN	No	100
Translocate weka	BT	No	100
	GE	No	100
	NR	No	100
	QN	No	100
Tītī town	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100

Comments

Perching kohukohu, tāwhiri karo (Pittosporum cornifolium)

Action	Expert	Impact	Confidence
Status Quo	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Burrow modifications	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Supplementary feeding of weka	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Weka fence	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
	BT	Yes	100
Weka fence plus	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
	BT	Yes	100
Burrow modifications + supplementary feeding of weka	BT	No	100
	GE	No	100
	NR	No	100
	QN	No	100
Weka deterrent	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Weka deterrent + supplementary feeding	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Burrow special	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Select weka + burrow modification	BT	No	100
	GE	No	100
	NR	No	100
	QN	No	100
Translocate weka	BT	No	100
	GE	No	100
	NR	No	100
	QN	No	100
Tītī town	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
	BT	Yes	100

Comments

Weka fence

BT:A significant amount of trees will need to be cut for a fence, but none of this will cause extinctions

Weka fence plus

BT:A significant amount of trees will need to be cut for a fence, but none of this will cause extinctions

Select weka + burrow modification

BT:A significant amount of trees will need to be cut for a fence, but none of this will cause extinctions

Translocate weka

BT:A significant amount of trees will need to be cut for a fence, but none of this will cause extinctions

Tītī town

BT:Some trees will need to be cut for a fence, but none of this will cause extinctions

Coastal tree daisy (Olearia solandri)

Action	Expert	Impact	Confidence
Status Quo	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Burrow modifications	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Supplementary feeding of weka	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Weka fence	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
	BT	Yes	100
Weka fence plus	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
	BT	Yes	100
Burrow modifications + supplementary feeding of weka	BT	No	100
	GE	No	100
	NR	No	100
	QN	No	100
Weka deterrent	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Weka deterrent + supplementary feeding	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Burrow special	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Select weka + burrow modification	BT	No	100
	GE	No	100
	NR	No	100
	QN	No	100
Translocate weka	BT	No	100
	GE	No	100
	NR	No	100
	QN	No	100
Tītī town	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
	BT	Yes	100

Comments

Weka fence

BT:A significant amount of trees will need to be cut for a fence, but none of this will cause extinctions

Weka fence plus

BT:A significant amount of trees will need to be cut for a fence, but none of this will cause extinctions

Select weka + burrow modification

BT:A significant amount of trees will need to be cut for a fence, but none of this will cause extinctions

Translocate weka

BT:A significant amount of trees will need to be cut for a fence, but none of this will cause extinctions

Tītī town

BT:Some trees will need to be cut for a fence, but none of this will cause extinctions

Thick-leaved mahoe (Melicytus crassifolius)

Action	Expert	Impact	Confidence
Status Quo	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Burrow modifications	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Supplementary feeding of weka	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Weka fence	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
	BT	Yes	100
Weka fence plus	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
	BT	Yes	100
Burrow modifications + supplementary feeding of weka	BT	No	100
	GE	No	100
	NR	No	100
	QN	No	100
Weka deterrent	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Weka deterrent + supplementary feeding	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Burrow special	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Select weka + burrow modification	BT	No	100
	GE	No	100
	NR	No	100
	QN	No	100
Translocate weka	BT	No	100
	GE	No	100
	NR	No	100
	QN	No	100
Tītī town	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
	BT	Yes	100

Comments

Weka fence

BT:A significant amount of trees will need to be cut for a fence, but none of this will cause extinctions

Weka fence plus

BT:A significant amount of trees will need to be cut for a fence, but none of this will cause extinctions

Select weka + burrow modification

BT:A significant amount of trees will need to be cut for a fence, but none of this will cause extinctions

Translocate weka

BT:A significant amount of trees will need to be cut for a fence, but none of this will cause extinctions

Tītī town

BT:Some trees will need to be cut for a fence, but none of this will cause extinctions

Cook Strait Māhoe (Melicytus orarius)

Action	Expert	Impact	Confidence
Status Quo	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Burrow modifications	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Supplementary feeding of weka	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Weka fence	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
	BT	Yes	100
Weka fence plus	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
	BT	Yes	100
Burrow modifications + supplementary feeding of weka	BT	No	100
	GE	No	100
	NR	No	100
	QN	No	100
Weka deterrent	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Weka deterrent + supplementary feeding	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Burrow special	BT	No	100
	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Select weka + burrow modification	BT	No	100
	GE	No	100
	NR	No	100
	QN	No	100
Translocate weka	BT	No	100
	GE	No	100
	NR	No	100
	QN	No	100
Tītī town	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
	BT	Yes	100

Comments

Weka fence

BT:A significant amount of trees will need to be cut for a fence, but none of this will cause extinctions

Weka fence plus

BT:A significant amount of trees will need to be cut for a fence, but none of this will cause extinctions

Select weka + burrow modification

BT:A significant amount of trees will need to be cut for a fence, but none of this will cause extinctions

Translocate weka

BT:A significant amount of trees will need to be cut for a fence, but none of this will cause extinctions

Tītī town

BT:Some trees will need to be cut for a fence, but none of this will cause extinctions

Dwarf mistletoe (Korthalsella salicornioides)

Action	Expert	Impact	Confidence
Status Quo	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Burrow modifications	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Supplementary feeding of weka	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Weka fence	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Weka fence plus	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Burrow modifications + supplementary feeding of weka	GE	No	100
	NR	No	100
	QN	No	100
Weka deterrent	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Weka deterrent + supplementary feeding	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Burrow special	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Select weka + burrow modification	GE	No	100
	NR	No	100
	QN	No	100
Translocate weka	GE	No	100
	NR	No	100
	QN	No	100
Tītī town	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100

Comments

Cook’s scurvy grass (Lepidium oleraceum)

Action	Expert	Impact	Minimum Plausible	Most Likely	Maximum Plausible	Confidence
Status Quo	GE	Yes	2	5	30	90
	HV	No	0	0	0	100
	NR	No	0	0	0	100
	QN	No	0	0	0	100
Burrow modifications	GE	Yes	2	5	30	90
	HV	No	0	0	0	100
	NR	No	0	0	0	100
	QN	No	0	0	0	100
Supplementary feeding of weka	GE	Yes	2	5	30	90
	HV	No	0	0	0	100
	NR	No	0	0	0	100
	QN	No	0	0	0	100
Weka fence	GE	Yes	2	5	30	90
	HV	No	0	0	0	100
	NR	No	0	0	0	100
	QN	No	0	0	0	100
Weka fence plus	GE	Yes	2	5	30	90
	HV	No	0	0	0	100
	NR	No	0	0	0	100
	QN	No	0	0	0	100
Burrow modifications + supplementary feeding of weka	GE	Yes	2	5	30	90
	NR	No	0	0	0	100
	QN	No	0	0	0	100
Weka deterrent	GE	Yes	2	5	30	90
	HV	No	0	0	0	100
	NR	No	0	0	0	100
	QN	No	0	0	0	100
Weka deterrent + supplementary feeding	GE	Yes	2	5	30	90
	HV	No	0	0	0	100
	NR	No	0	0	0	100
	QN	No	0	0	0	100
Burrow special	GE	Yes	2	5	30	90
	HV	No	0	0	0	100
	NR	No	0	0	0	100
	QN	No	0	0	0	100
Select weka + burrow modification	GE	Yes	2	5	30	90
	NR	No	0	0	0	100
	QN	No	0	0	0	100
Translocate weka	GE	Yes	2	5	30	90
	NR	No	0	0	0	100
	QN	No	0	0	0	100
Tītī town	GE	Yes	2	5	30	90
	HV	No	0	0	0	100
	NR	No	0	0	0	100
	QN	No	0	0	0	100

Comments

White mistletoe (Tupeia antarctica)

Action	Expert	Impact	Confidence
Status Quo	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Burrow modifications	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Supplementary feeding of weka	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Weka fence	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Weka fence plus	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Burrow modifications + supplementary feeding of weka	GE	No	100
	NR	No	100
	QN	No	100
Weka deterrent	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Weka deterrent + supplementary feeding	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Burrow special	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100
Select weka + burrow modification	GE	No	100
	NR	No	100
	QN	No	100
Translocate weka	GE	No	100
	NR	No	100
	QN	No	100
Tītī town	GE	No	100
	HV	No	100
	NR	No	100
	QN	No	100

Expert Elicitation Summary: Impacts of Tītī Conservation on Ecosystem

Background

General background information

Questionnaire

Status quo

Actions

Additional information

Comments

Burrow modifications

Actions

Comments

Supplementary feeding of weka

Actions

Additional information

Comments

Weka fence

Actions

Comments

Weka fence plus

Actions

Comments

Burrow modifications + supplementary feeding of weka

Actions

Additional information

Comments

Weka deterrent

Actions

Comments

Weka deterrent + supplementary feeding

Actions

Additional information

Comments

Burrow special

Actions

Additional information

Comments

Select weka

Actions

Additional information

Comments

Select weka + burrow modification

Actions

Additional information

Comments

Translocate weka

Actions

Comments

Tītī town

Actions

Additional information

Comments

Answers by species

Goldstripe gecko (Woodworthia chrysosiretica)

Comments

Status Quo

Burrow modifications

Supplementary feeding of weka

Weka fence

Weka fence plus

Burrow modifications + supplementary feeding of weka

Select weka + burrow modification

Translocate weka

Tītī town

Wellington green barking gecko (Naultinus punctatus)

Comments

Status Quo

Burrow modifications

Supplementary feeding of weka

Weka fence

Weka fence plus

Burrow modifications + supplementary feeding of weka

Weka deterrent

Select weka + burrow modification

Translocate weka

Tītī town

Copper skink (Oligosoma aeneum)

Comments

Status Quo

Burrow modifications

Supplementary feeding of weka