Colorado’s mountain lions, bobcats and lynx are under threat from trophy hunting and need protection now.

Wherever you are in the U.S., a coyote may be taking up residence less than a mile away. If you live in the city, you’re more likely than your rural cousins to encounter raccoons. And regardless of geography, you probably share your home with dozens of species of insects and spiders. These facts...

The mountain lion known as P-47 survived fires, freeways and hostile ranchers. But in March, the 3-year-old big cat—tracked by California biologists since his kitten days—succumbed to a hidden hazard: an insidious form of food poisoning. Six anticoagulant compounds—chemicals used to kill rodents...

WARNING: This page contains graphic content. What are wildlife killing contests? While contests like dogfighting and cockfighting have been condemned in the U.S. as barbaric and cruel, wildlife killing contests still happen regularly in almost all of the 42 U.S. states they are legal in. Killing...

It seemed like a good idea at the time: Buy a house with a two-acre property, let our energetic herding dog have the run of the place and spend blissful summer days digging side by side in the dirt with her. And it was blissful, watching Mattie carve out her napping spots behind the ferns and tall...

WASHINGTON - The Humane Society of the United States released today the results of a disturbing undercover investigation into two wildlife killing contests in Frederick County and in Waldorf, Maryland. Investigators documented the judging portions of the events, with participants lining up rows of...