These public domain images of threatened or endangered species are courtesy of the US Fish and Wildlife Service’s Digital Library.
Canis rufus. Red Wolf at the Alligator River National Wildlife Refuge. By Steve Hillebrand. 335.1.01_Hillebrand_LO5S5248a.jpg
Ursus americuans. Black bear at the Alligator River National Wildlife Refuge. By Steve Hillebrand. 335.1.01_Hillebrand_LO5S4773a.jpg
Icaricia icarioides missionensis. Mission Blue Butterfly. By Stuart Weiss.
Alligator mississippiensis. J.N. "Ding" Darling National Wildlife Refuge, Florida. U.S. Fish and Wildlife Service_310.1.15_2009-09-29
Mycteria americana. Wood Stork. J.N. "Ding" Darling National Wildlife Refuge, Florida. By Steve Hillebrand. Hillebrand_310.1.15_2009-01-29
Mustela nigripes. Black-Footed Ferret at Black-Footed Ferret Recovery Program in Colorado. By Ryan Hagerty. WV-W5B1587
Florida Panther. WO2883-33F