Monkeys may sometimes grieve for dead mates through necrophilia

A sad story of two marmosets documented by animal behavior researcher Bruna Bezerra, who was observing the primates in their northeast Brazil home:

The pair had been the dominant male and female since observations began. When the female fell out of the tree, her partner engaged in a number of behaviors, including embracing her, sniffing at her, chasing other monkeys away, sitting by her, and trying to copulate with her. He also emitted alarm calls normally used when a predator is near. And several months after her death, the male disappeared from the marmoset group, never to be seen again.

More: Do Monkeys Grieve for Fallen Mates? | Science/AAAS. Here’s the study, in the journal Primates. There’s video, too. [via Ed Yong]