The following list is an adaptation of data published at the The US Fish & Wildlife Service's Endangered Species Program Website. For the most current data, please refer to US Fish & Wildlife Service database (TESS).
Bear, grizzly (Ursus arctos horribilis)
Butterfly, Uncompahgre fritillary (Boloria acrocnema)
Chub, bonytail (Gila elegans)
Chub, humpback (Gila cypha)
Crane, whooping (Grus americana)
Curlew, Eskimo (Numenius borealis)
Ferret, black-footed (Mustela nigripes)
Flycatcher, southwestern willow (Empidonax traillii extimus)
Lynx, Canada (Lynx canadensis)
Mouse, Preble's meadow jumping (Zapus hudsonius preblei)
Owl, Mexican spotted (Strix occidentalis lucida)
Pikeminnow (=squawfish) (Ptychocheilus lucius)
Plover, piping (Charadrius melodus)
Skipper, Pawnee montane (Hesperia leonardus montana)
Sucker, razorback (Xyrauchen texanus)
Tern, least (Sterna antillarum)
Trout, greenback cutthroat (Oncorhynchus clarki stomias)
Wolf, gray (Canis lupus)
Source
US Fish & Wildlife Service. 'Threatened and Endangered Species (Colorado)' (On-line), The Endangered Species Program. Accessed April 29, 2008.
