The Nest

S1 E1: Bird nests come in all shapes and sizes, crafted from an inexhaustible diversity of materials, including fur, grasses, leaves, mosses, sticks and twigs, bones, wool, mud and spider silk -- even colorful twine, bits of wire and plastic bags! Each one is a remarkable work of art, built with just a beak, for the all-important task of protecting eggs and raising young.