A green-rumped parrotlet (Forpus passerinus), widow and her nestlings. When the nestlings spill out of the nest cavity begging for food as these chicks are, this indicates that they aren't getting ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American Sometimes, zoo animals behave unnaturally.

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 ...

Many bachelor mammals, including lions, mountain gorillas, monkeys, and mice, attack and kill the offspring of other males--a form of infanticide--yet display parental behavior once they themselves ...

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Hidden survival tactics: Male zebras and hippos both display aggressive behaviors like infanticide or territorial violence, ...