Janet, an adult primate observed in juvenile behavior.
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There are 30 new articles in PLoS ONE this week. Here are my picks:
Ultrasonic Communication in Rats: Can Playback of 50-kHz Calls Induce Approach Behavior?:
Rats emit distinct types of ultrasonic vocalizations, which differ depending on age, the subject's current state and environmental factors.…
Last year, in a paper published in the journal Current Biology, Jill Pruetz and Paco Bertolani reported on their observation of ten different chimpanzees thrusting wooden "spears" into holes in trees 22 times over the course of more than a year, presumably to stun bush babies that sleep in the…
This is a photograph of wild western lowland gorillas copulating in, sort of, the missionary position. This shot was taken in the Nouabale-Ndoki National Park in the Republic of Congo.
The female gorilla in the photograph, nicknamed "Leah" by researchers, has twice made history. In 2005 Breuer…
A brief clip of a Siamang (Symphalangus syndactylus) vocalizing.
Some mornings in the forests of Indonesia, a male and female gibbon will perform a musical duet. The pair will call out, staking their claim in the forest, often answered by neighboring pairs, their treetop display the result of…