Science, Maths & Technology
Migration
...simple nest, she lays between two and five eggs. It will take them nearly a month to hatch. She shoulders the burden of all the incubating. But while she sits, her mate stands guard. Though nesting on islands keeps wolves and foxes at bay, there are other dangers - ravens. When the first clutches hatch, a few addled eggs are left in the abandoned nests. These attract...