Aleutian Canada goose courtesy USFWS
American alligator courtesy NPS
American burying beetle courtesy USFWS
American crocodile (Florida DPS) courtesy NPS
American peregrine falcon © Craig-Koppie
Apache trout courtesy Arizona Department of Game and Fish
Arctic peregrine falcon by Steve Maslowski, USFWS
Atlantic green sea turtle courtesy NOAA
Atlantic hawksbill sea turtle courtesy NOAA
Atlantic leatherback sea turtle courtesy NOAA
Atlantic piping plover courtesy Flickr Commons/USFWS Northeast Region
Bald eagle (continental U.S. DPS) © Robin Silver
Bayou darter by Tom Thornhill, USFWS
Big Bend gambusia courtesy Texas Parks and Wildlife Service
Bighorn sheep (Peninsular Ranges DPS) courtesy USFWS
Black-footed ferret by Randy Matchett, USFWS
Blue whale courtesy NOAA
Bowhead whale courtesy NOAA
Brown pelican (Eastern DPS) courtesy Flickr Commons/Andrea Westmoreland
California bighorn sheep (Sierra Nevada DPS) courtesy USDA Forest Service
California brown pelican courtesy USFWS
California condor by Scott Frier, USFWS
California least tern courtesy Flickr Commons/USFWS Pacific Southwest Region
California towhee by Dave Menke, USFWS
Columbian white-tailed deer (Douglas County DPS) courtesy USFWS
Concho water snake by Michael Forstner, Texas State University, San Marcos
Cui-ui courtesy USGS
Delmarva Peninsula fox squirrel courtesy USFWS
Eastern brown pelican (Western Gulf Coast DPS) by Jim Rorabaugh, USFWS
Eggert's sunflower courtesy USFWS
El Segundo blue butterfly courtesy Flickr/stonebird
Fin whale courtesy Flickr Commons/dryoptera
Florida manatee courtesy USFWS
Florida panther courtesy USFWS
Gila trout by Craig Springer, USFWS
Gray bat courtesy USFWS
Gray whale (Northeast Pacific DPS) courtesy NOAA
Gray wolf (Northern Rockies DPS) courtesy Wikimedia Commons/Retron
Gray wolf (Southwest DPS) by George Andrejko, Arizona Game and Fish Department
Gray wolf (Western Great Lakes DPS) by Gary Kramer, USFWS
Great Lakes piping plover courtesy Flickr Commons/USFWS Northeast Region
Grizzly bear (Yellowstone DPS) courtesy USFWS
Guadalupe fur seal © John Kipping, California Academy of Sciences
Guam rail courtesy Flickr Commons/Smithsonian's National Zoo
Hawaiian common moorhen (`alae `ula) by John and Karen Hollingsworth, USFWS
Hawaiian coot (`alae ke`oke`o) courtesy USFWS
Hawaiian duck (koloa maoli) by Glen Smart, USFWS
Hawaiian goose by Glen Smart, USFWS
Hawaiian stilt (ae`o) courtesy Flickr Commons/kaleomokuokanalu
Humpback whale courtesy NOAA
Kemp's ridley sea turtle by Bill Reaves, Texas Parks and Wildlife
Key deer courtesy Wikimedia Commons/Ianare Sevi
Kirtland's warbler courtesy Flickr Commons/USFWS
Lake Erie water snake (off-shore DPS) by Kristin Stanford, USFWS
Laysan duck by John Klavitter, USFWS
Laysan finch courtesy Flickr Commons/USFWS
Least Bell's vireo © Richard and Nora Bowers
Light-footed clapper rail (U.S. DPS) by Phil Roullard, USFWS
Maguire daisy by Michelle Dela Cruz, NPS
Mississippi Sandhill crane by John and Karen Hollingsworth, USFWS
Mohave tui chub courtesy NPS
Mountain golden heather courtesy USFWS
Northern Aplomado falcon by Chris Perez, USFWS
Northern Great Plains piping plover courtesy USFWS and Nebraska Game and Parks Commission
Northern red-bellied cooter (Plymouth DPS) © John White, Virginia Herpetological Society
Okaloosa darter courtesy Fickr Commons/Noel Burkhead
Oregon chub courtesy USFWS
Owens pupfish courttesy BLM
Ozark big-eared bat courtesy USFWS
Pacific green sea turtle courtesy Fickr Commons/mattk1979
Pahrump poolfish courtesy USFWS
Palau fantail courtesy iStock/MichaelStubblefield
Palau ground dove © Valarie. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivs License - Version 2.0
Palau owl habitat courtesy Flickr Commons/simonglucas
Palos Verdes blue courtesy USFWS
Puerto Rican parrot courtesy USFWS
Puerto Rican plain pigeon © Alejandro Sanchez
Red wolf courtesy USFWS
Robbins' cinquefoil courtesy USFWS
San Clemente Island lotus © California Native Plant Society
San Clemente Island bush mallow © J.S. Peterson, USDA NRCS
San Clemente Island paintbrush courtesy USFWS Pacific Southwest Region
San Clemente loggerhead shrike courtesy USFWS
San Clemente sage sparrow courtesy USFWS
San Miguel island fox Courtesy NPS
Sandplain gerardia courtesy USFWS
Santa Catalina island fox Courtesy U.S. Navy
Santa Cruz island fox © Gary Roemer
Santa Rosa island fox Courtesy NPS
Seabeach amaranth courtesy USFWS
Shortnose sturgeon courtesy USFWS
Small whorled pogonia courtesy USFWS
Snail darter courtesy Wikimedia Commons/InvisibleK
Socorro isopod courtesy USFWS
Southern sea otter courtesy Flickr Creative Commons/Mike Baird
Steller sea-lion (eastern DPS) courtesy NOAA
Steller sea-lion (western DPS) courtesy NOAA
Tennessee coneflower courtesy TN.gov
Texas wild rice courtesy Texas Parks and Wildlife Department
Tidewater goby by Greg Goldsmith, USFWS
Tinian monarch courtesy USFWS
Tulotoma courtesy USFWS
Utah prairie dog courtesy USFWS and Hogle Zoo
Virgin Islands tree boa by Thomas Schmidt, USFWS
Virginia big-eared bat courtesy USFWS
Virginia round-leaf birch courtesy USFWS
Western snowy plover (Pacific DPS) courtesy USFWS
Whooping crane © Robin Silver
Wood stork (U.S. breeding DPS) courtesy USFWS
Yellowfin madtom courtesy Tennessee Valley Authority