When most people imagine territorial aggression in the animal kingdom, they picture lions roaring across the savanna or wolves howling at pack borders. Fierce, obvious, and easy to respect. The ...

Aggression in the animal kingdom can take many forms, including biting, charging, and stinging. Some animals lash out to defend their young, others to secure a meal, and a few seem ready just because ...

A new study of our two closest living relatives finds that, at least in zoos, bonobos may not be more peaceful than ...

The New Mexico Department of Wildlife is warning people to remain cautious after two incidents involving unusually aggressive ...

We got our two tabby cat sisters when they were three months old. They’ve always been very close – snuggling, sleeping and grooming each other. Two weeks ago, they were sitting together in our ...

Gut bacteria create smells that influence behavior, shaping aggression and social hierarchy through the brain.

Animals may behave similarly in cities because they learn from each other how to exploit novel human food sources. For instance, the cockatoos in Sydney have learned to open trash bins. In Toronto, ...