Résumé de l'épisode 3
A beak made from horn, without any teeth, might seem a clumsy implement for gathering food. But birds have evolved an amazing range of bill shapes and sizes designed to hammer out grubs from trees, winkle out tiny seeds from fruits, and sip nectar from the deep recesses of flowers. If their bills and tongues can't reach what they're seeking, some of them even use tools to help them get a meal.
Extrait de l'épisode 3 de Life of Birds