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Colorado Parks and Wildlife releases gray wolf onto public land in Grand County, Colorado on Monday, December 18, 2023.

invasive

Federally Endangered, Federally Threatened, State Endangered, State Threatened, State Special Concern

Gray Wolf

Mammal - Canis lupus

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Great Basin Spadefoot, NPS

invasive

Great Basin Spadefoot

Amphibian - Spea intermontana

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Great Plains Rat Snake, NPS

invasive

Great Plains Ratsnake

Reptile - Pantherophis emoryi

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Great Plains Skink, Gary Stolz, FWS

invasive

Great Plains Skink

Reptile - Plestiodon (Eumeces) obsoletus

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Great Plains Toad, NPS

invasive

Great Plains Toad

Amphibian - Bufo cognatus, Anaxyrus cognatus

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Greater prairie-chicken, Wayne D. Lewis

invasive

Greater Prairie-Chicken

Bird - Tympanuchus cupido

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Greater Sage Grouse, Wayne D. Lewis

invasive

Federally Threatened, State Endangered

Greater Sage-Grouse

Bird - Centrocercus urophasianus

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Green Toad, Cecelia Alexander, PD

invasive

Green Toad

Amphibian - Bufo debilis, Anaxyrus debilis

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greenback cutthroat illustration by Joseph R. Tomelleri.

invasive

Federally Threatened, State Threatened

Greenback Cutthroat Trout

Fish - Oncorhynchus clarki stomias

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Kevyn Jalone/NPS

invasive

Federally Threatened, State Endangered

Grizzly Bear

Mammal - Ursus arctos

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Gunnison sage-grouse, Gary Kramer, USFWS, PD

invasive

Federally Threatened, State Endangered

Gunnison Sage-Grouse

Bird - Centrocerus minimus

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