Osprey numbers are recovering after a drop in contaminants in the Delaware Estuary.

In a case of acoustic deception, caterpillars mimic bird alarm calls to defend themselves.

The Jurassic predator Razanandrongobe sakalavae used its colossal, ragged teeth to rip through the muscles and bones of its prey. 

Monarch and queen caterpillars store toxic compounds from their milkweed diet to ward off predators into adulthood, a new study suggests.

Ambush predators are more likely to have vertical slit pupils, while foraging animals tend to have horizontal ones, a study shows.

Microscopic analysis of carnivorous dinosaur teeth reveals specialized serrated edges.

The mollusk’s flashy tactics scare off predators.

A round-up of recent discoveries in behavior research

Extinct, giant arthropods, long assumed to be top predators of ancient seas, didn’t have sharp enough eyesight to be refined hunters.