Quick Take Scientists have documented same-sex behavior in hundreds of animal species, though it is not considered a required function for specific ecosystem roles. Some researchers suggest that ...

Homosexual behavior is much more common across the animal kingdom than we first thought, new research has found. Scientists found that 78 percent of animal behavior experts had seen some degree of ...

Never underestimate the mind of a crow. Members of a family of birds that includes ravens, rooks, magpies, and jays, crows have been known to bend wire into hooks to retrieve food; drop nuts in a road ...

Instinct / Charles Darwin -- Introduction / George C. Romanes -- Introduction / E. L. Thorndike -- What is behaviorism? / J. B. Watson -- Critique of Konrad Lorenz's theory of instinctive behavior / ...