Federal wildlife officials say the world's oldest known seabird has returned to Midway Atoll.
Researchers have released a desert tortoise raised on a Marine Corps base as part of efforts aimed at reinvigorating the threatened population in the western Mojave Desert.
Poaching and habitat loss have landed the military macaw and the great green macaw, two birds typically found in Central and South America, on the US endangered species list, officials said Thursday.
Walrus carcasses were found last week on a northwest Alaska beach, but the U.S. Fish and Wildlife Service says the deaths appear to be natural.
The U.S. Fish and Wildlife Service said Friday it is investigating the deaths of 25 Pacific walrus found on an isolated northwest Alaska beach.
Fishermen benefiting from booming prices for American eels are squirming about a decision expected this month on whether to list the fish under the Endangered Species Act.
The federal government said Friday that public and private conservation efforts have helped the New England cottontail rebound to the point where it can be taken off the list of species under consideration for protection.
The kind of clear-cutting that made the woods of Maine an ideal hunting ground for Canada lynx is a thing of the past, but wildlife experts are trying to recreate enough of that habitat to secure the thick-furred cat's future.
Crunching through waist-high prairie grass, the researchers scan ahead with binoculars. Peering out at the black-eyed susans reaching above the prairie dropseed, they are searching for something they do not expect to find ...
Wolf experts from around the nation will be gathering this week to consider how to help the critically endangered red wolf.