For social animals, communication is a key that unlocks the benefits of group living. It’s well known that animals with more ...

Monk parakeets in Barcelona use more varied calls in larger groups. Females produce more call types, indicating social ...

Take for example, the prothonotary (pro-thon-uh-ter-ee) warbler. It’s a bright golden bird about 5 inches long and weighing ...

In the urban parks of Barcelona, Spain, the calls of a tropical parrot fill the air. The bright green monk parakeet, native to South America ... squawking happens in large groups with many ...