gull Vermivora chrysoptera — golden-winged warbler Wilsonia citrina — hooded warbler Birds of special concern Bucephala islandica (eastern population) — Barrow's goldeneye Coturnicops noveboracensis — yellow rail Dendroica cerulea — cerulean warbler Falco peregrinus pealei — peregrine falcon, pealei subspecies Histrionicus histrionicus (eastern population) — harlequin duck Icteria virens virens — yellow-breasted chat, virens subspecies Megascops kennicottii kennicottii — western screech-owl, kennicottii subspecies Melanerpes lewis — Lewis' woodpecker Numenius americanus — long-billed curlew Otus flammeolus — flammulated owl Pagophila eburnea — ivory gull Passerculus sandwichensis princeps — Savannah sparrow, princeps subspecies Rhynchophanes mccownii — thick-billed longspur Seiurus motacilla — Louisiana waterthrush Synthliboramphus antiquus — ancient murrelet Tyto alba (western population) — barn owl Reptiles Extirpated reptiles Actinemys marmorata — Pacific pond turtle Crotalus horridus — timber rattlesnake Phrynosoma douglasii — pygmy short-horned lizard Pituophis catenifer catenifer — Pacific gophersnake Endangered reptiles Chrysemys picta bellii (Pacific Coast population) — western painted turtle Clemmys guttata — spotted turtle Coluber constrictor foxii — blue racer Contia tenuis — sharp-tailed snake Dermochelys coriacea — leatherback seaturtle Emydoidea blandingii (Nova Scotia population) — Blanding's turtle Eumeces septentrionalis — prairie skink Hypsiglena torquata — nightsnake Threatened reptiles Apalone spinifera — spiny softshell Coluber constrictor flaviventris — eastern yellow-bellied racer Crotalus oreganus — western rattlesnake Elaphe gloydi — eastern foxsnake Elaphe spiloides — grey ratsnake Emydoidea blandingii (Great Lakes / St. Lawrence population) — Blanding's turtle Heterodon platirhinos — eastern hog-nosed snake Pituophis catenifer deserticola — Great Basin gophersnake Regina septemvittata — queen snake Sistrurus catenatus — massasauga Sternotherus odoratus — stinkpot Thamnophis butleri — Butler's gartersnake Thamnophis sauritus (Atlantic population) — eastern ribbonsnake Reptiles of special concern Charina bottae — rubber boa Chrysemys picta bellii (intermountain–Rocky Mountain population) — western painted turtle Coluber constrictor mormon — western yellow-bellied racer Eumeces skiltonianus — western skink Graptemys geographica — northern map turtle Lampropeltis triangulum — milksnake Thamnophis sauritus (Great Lakes population) — eastern ribbonsnake Amphibians Extirpated amphibians Ambystoma tigrinum (Great Lakes population) — tiger salamander Endangered amphibians Acris crepitans — northern cricket frog Ambystoma texanum — small-mouthed salamander Ambystoma tigrinum (southern mountain population) — tiger salamander Ascaphus montanus — Rocky Mountain tailed frog Rana pipiens (southern mountain population) — northern leopard frog Rana pretiosa — Oregon spotted frog Threatened amphibians Ambystoma jeffersonianum — Jefferson salamander Bufo fowleri — Fowler's toad Desmognathus ochrophaeus — Allegheny Mountain dusky salamander Dicamptodon tenebrosus — coastal giant salamander Spea intermontana — Great Basin