Chimpanzee nest-building behavior may reveal an ability to respond to weather cues before nighttime conditions fully arrive.

Every evening, as they move from place to place through the forest, chimpanzees stop to build a nest – most often in a tree – to sleep in. Using a selection of branches, leaves and twigs, they create ...

The chimpanzees tended to build more insulating nests when the weather was colder and when it was more humid, both during nest-building and overnight. In cooler and wetter conditions, the chimps also ...