Birds are vertebrate animals adapted for flight. Many can also run, jump, swim, and dive. Some, like penguins, have lost the ability to fly but retained their wings. Birds are found worldwide and ...

Sergio’s conclusion: that black kites were using style to show their social dominance. Nests with the most plastic belonged to the strongest birds, able to fend off attackers that coveted their ...

"Of course some of the birds have different reactions to the net. Some of them will lay there, stay still. Others are a little more like, 'what’s going on? Let me out,'" said Romero, as a ...