Each of the world's bird species has adapted in some way to this seasonality—many by making long, precisely timed annual movements. Migration is the umbrella term for the tremendously variable movement patterns that birds have evolved for this purpose. read more
The island of youth or the island of pines which are very important for migratory birds. So those 350, around 174 species are migratory birds, birds that we share populations with them. Populations are declining. Populations of birds that we once shared are maybe still there. We don’t know. As the ivory bill woodpecker for example. read more
No. Being migratory is not a particularly special evolutionary trait that would label a species “more highly adapted” (to change from the inappropriate “more evolved”). Some migratory birds are quite ancient. Cranes, for instance are one of the oldest groups of existing birds. read more