With an emphasis on provocative and unanswered questions, this series follows researchers on the winding paths of uncertainty and the unknown — and from the mysteries of astrophysics to the technologies that could rival or surpass the abilities of the human mind.
For some animals, living in the midst of huge colonies of their own kind is the most secure and rewarding housing arrangement. Icelandic puffins form nesting colonies of more than a million, providing shared information about food sources and reducing the odds of attacks on individual birds. But colonies are useful for predators, too.
Bird nests come in all shapes and sizes, crafted from a diversity of materials, including fur, grasses, leaves, mosses, sticks and twigs, bones, wool, mud and spider silk. Quite a few contain man-made materials – twine, bits of wire, even plastic bags.