Six red wolf pups were recently born at Zoo Knoxville, a significant milestone as the species is critically endangered, according to zoo officials.

Red wolves, which can grow to be about 80 pounds, have been called the most endangered wolf species on Earth. They once lived ...

Zoo Knoxville is celebrating the Earth Day birth of six critically endangered red wolf pups. The pups were born to first-time mother Cirilla and nine-year-old Buckeye as part of a national breeding ...