Monarch butterflies are now listed as endangered because of fast dwindling populations in North America...

Great white shark researchers on Cape Cod are reminding visitors that warmer weather signals not just the start of the busy tourist season, but also the arrival of the region’s famous predators...

California officials are weighing whether to list the iconic western Joshua tree as a threatened species...

Many species of birds are nesting and laying eggs nearly a month earlier than they did 100 years ago in the Chicago area...