Competition over love and real estate drives two extreme behaviors in green-rumped parrotlets, a new study finds—either caring for or killing one another’s babies. Infanticide and adoption in the ...

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 ...

Infanticide and adoption in the animal kingdom have long puzzled scientists. While both males and females of many species are known to kill the babies of their rivals to secure sexual or social ...

You may be familiar with the large, talking green bird known as a parrot. There's another parrot type called parrotlet, which is much smaller than the birds you’re familiar with. Parrotlets can also ...

Pacific parrotlets are highly popular among bird owners. While they have a strong voice, they can't scream or talk as well as other bigger parrot species. Thanks to their quiet nature and smaller size ...

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 ...