BOULDER COUNTY
EXTIRPATED & DECLINING SPECIES LIST

Mammals

Gray wolf (E)
Grizzly bear (E)
River otter (E)

MOUNTAINS

Mammals
Loggerhead shrike (D)
Lynx (E)
Bobcat (E)
Wolverine (D)

Birds
Barrow's goldeneye (E)
Mountain plover (E)
Northern goshawk (D)
Willow flycatcher (D)

Other species to watch in the mountains: bighorn sheep, boreal toad, northern leopard frog.

PLAINS

Birds

Sharp-tailed grouse (E)
Long-billed curlew (E)
American bittern (D)
Burrowing owl (D)
Red-headed woodpecker (D)
Northern harrier (D)
Swainson's hawk (D)
Loggerhead shrike (D)
Northern bobwhite (D)
Long-eared owl (D)
Brown thrasher (D)

Mammals

Bison (E)
Black-footed ferret (E)
Pronghorn antelope (E)
White-tailed jackrabbit (D)
Preble's meadow jumping mouse (D)
Merriam's shrew (D)

Other species to monitor in the plains: prairie dog, ferruginous hawk. Prairie dogs are a keystone species which means that many other species depend on them within the food web, especially raptors (birds of prey such as the ferruginous hawk). Prairie dog colonies face serious threat from development county-wide.

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