Theropods are characterized by hollow bones, two legs, and three-toed limbs, much like a bird. These features make birds a versatile species. Not only do they fly, but many types of birds can also ...

They call and fly backwards and forward to draw local ... the bird world has its share of “bird brains.” There are the birds that build three nests behind three holes under a flower pot ...

"On a big night in the spring, you're talking 450 to 500 million birds flying under cover of darkness." For the most part, birds aren't at the Northeast yet, as it's the very beginning of our ...

More than 99% of birds can fly. But that still leaves many species that evolved to be flightless, including penguins, ostriches, and kiwi birds. In a study in the journal Evolution, researchers ...