2025 Invasive species distribution on Great Gull

2026 Invasive species distribution on Great Gull

Invasive species observations - 2025

August 2025
common_name n_observations
Other/Unlisted 842
Wild Radish/Mustard 324
Oriental Bittersweet 236
Virginia Creeper 202
Dewberry/Rubus sp. 125
Phragmites/Common Reed 91
Common Milkweed 82
Thistle/Cirsium sp. 59
Common Evening Primrose 28
Common St. John’s Wort 27
Cocklebur 22
Bindweed 18
Nightshade sp. 17
Poison Ivy 12
Aster sp. 9
Black Swallow-wort 3
Total 2097

Invasive species observations - 2026

August 2026
common_name n_observations
Wild Radish/Mustard 386
Oriental Bittersweet 340
Other/Unlisted 314
Virginia Creeper 218
Wild Carrot 182
Common Lambsquarters 167
Saltwort 157
Dewberry/Rubus sp. 142
Common Milkweed 109
Horseweed 105
Phragmites/Common Reed 97
Thistle/Cirsium sp. 97
Pokeweed 71
Common St. John’s Wort 61
Common Evening Primrose 52
Epazote/Mexican Tea 43
Grass/Sedge/Rush sp. 36
Ragweed 32
Bindweed 26
Nightshade sp. 26
Pepperweed 19
Cocklebur 15
Clover sp. 14
Sumac sp. 13
Mullein 10
Poison Ivy 10
Amaranth 6
Groundsel 6
Aster sp. 4
Black Swallow-wort 3
Knotweed 2
Total 2763

Change in the focus invasive species (2025 vs. 2026)

Phragmites/common reed, dewberry/Rubus sp., wild radish, common evening primrose, common milkweed, and cocklebur.

Observation counts by year for focus species
common_name y2025 y2026 pct_change
Cocklebur 22 15 -31.8
Common Evening Primrose 28 52 85.7
Common Milkweed 82 109 32.9
Dewberry/Rubus sp. 125 142 13.6
Phragmites/Common Reed 91 97 6.6
Wild Radish/Mustard 324 386 19.1

Individual invasive species counts per year

Individual Species distribution over time 2025-2026

Each map shows 2025 points (orange) vs. 2026 points (green) for one invasive species - turn years on/off with the layer control

Phragmites/Common Reed

Dewberry/Rubus sp.

Wild Radish/Mustard

Common Evening Primrose

Common Milkweed

Cocklebur