There are now more Mexican gray wolves roaming the American Southwest than at any time since the federal government began trying to reintroduce the predators nearly two decades ago.
The rusty patched bumblebee has become the first bee species in the continental U.S. to be declared endangered after suffering a dramatic population decline over the past 20 years, federal officials said Tuesday.
Federal wildlife officials on Thursday made a formal recommendation to list the rusty patched bumble bee as an endangered species because it has disappeared from about 90 percent of its historic range in just the past two ...
A group of Montana and federal wildlife officials has expressed opposition to a $57 million concrete dam and fish bypass that the U.S. government says would help an ancient and endangered fish species in the Yellowstone River.
Hunters soon could be chasing grizzly bears across the ridges of the Rocky Mountains, leaving three states to drum up plans to ensure the iconic species won't be snuffed out soon after recovering from threats to their survival.
The Obama administration brushed over the threat that climate change poses to the snow-loving wolverine when it denied protections for the elusive predator also known as the "mountain devil," a federal judge ruled Monday.
A fungal disease that has killed millions of bats nationwide has spread to Washington state, the first time white-nose syndrome has turned up in the western United States, federal wildlife officials said Thursday.
Federal wildlife officials say 13 bald eagles found dead on Maryland's Eastern Shore did not die of natural causes.
Federal wildlife officials recommended Friday that three fox subspecies native to California's Channel Islands be removed from the endangered species, saying their populations have made an historic recovery.
Native foxes on islands off the California coast were once on the brink of extinction.