As much as Tango would love another feathered friend or two, he doesn't need one. In fact, Cockatoos are mostly solitary ...

It’s difficult to ID Eastern and Western screech-owl species—location is your best bet. Hear their call and learn about their ...

New research painted a more accurate picture of the megafauna that spread widely around the Americas before they went extinct.

How much they weigh: From as little as 60 pounds (27 kilograms) to more than 1,700 pounds (771 kg) ...