Birds are known for their elaborate courtship rituals and romantic gestures that are replete with beautiful songs, complex dances, gift-giving practices, preening, and flamboyant plumage. While ...

Pair-bonded Java sparrows show enlarged eye rings to signal breeding readiness. Birds are known for their elaborate courtship rituals and romantic gestures that are replete with beautiful songs, ...

A new study shows that sparrows with more opposite-sex friends contribute more to the gene pool, but 'average' friendliness wins out in the long term. Scientists have assumed for a long time that ...