People in northern climates are familiar with flocks of birds flying south in the winter, but why do they do it, and why ...

Trumpeter swans fly over icy waters on Thursday ... is North America's largest and rarest water fowl and can be seen from the Riverlands Migratory Bird Sanctuary.

The bird is thought to have come from southern ... "Raptors, in general, do not like flying over water so it is quite unusual for a large raptor to come over the Channel. "But they would migrate ...