Chimpanzee friends fight together to battle rivals

Chimpanzees, one of the closest relatives of humans, cooperate on a group level—in combative disputes, they even cooperate with group members to whom they are not related. Those involved in fights with neighboring groups ...

The brains of birds synchronize when they sing duets

When a male or female white-browed sparrow-weaver begins its song, its partner joins in at a certain time. They duet with each other by singing in turn and precisely in tune. A team led by researchers from the Max Planck ...

Ravens learn best from their affiliates

One of the benefits of living together is gaining new information from group members. Once a group member starts displaying a new behavior, it frequently spreads to the rest of the group. In a study on ravens, Cognitive Biologists ...

Chimpanzees sniff out strangers and family members

Chemical communication is widely used in the animal kingdom to convey social information. For example, animals use olfactory cues to recognize group or family members, or to choose genetically suitable mates. In contrast ...

Dramatic differences spotted in chimp communities

Dramatic differences in chimp societies, discovered by researchers at the University of St Andrews, reveal variations in social status and sharing food, as seen in human cultures.

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