The Nene or Hawaiian Goose

From the USFWS National Wildlife Refuge System:

Happy World Wildlife Day. The endangered Hawaiian goose, or nene – shown at Kilauea Point National Wildlife Refuge (http://1.usa.gov/1986p3O) – is considered the world’s rarest goose. It is also the state bird of Hawaii. Photo by Katie Steiger-Meister / U.S. Fish and Wildlife Service