A newly published UC Berkeley-led study compiles nearly 30 years of research and observations of the green-rumped parrotlet, a small South American parrot, and their behavioral patterns of infanticide ...

Before learning to speak, human babies go through a vocal stage known as babbling, which is a well documented part of the vocal language acquisition process. Basically, babbling is how an animal ...

A green-rumpled parrotlet widow and her nestlings. The behavior of the nestlings — spilling out of the cavity begging for food — indicates that they aren't getting enough food. A team of University of ...