In the latest sign that wolves are continuing to make a comeback across California after being hunted out of existence for ...

U.S. bird populations are experiencing alarming declines due to factors such as habitat loss and climate change, according to a new report identifying 112 species that have reached a "tipping point," ...

The researchers behind the Science study used data from ... The findings revealed that 33% of butterfly species have experienced significant population declines over the past two decades, with ...