06 May '11, 6am

The Miracle of Migrating Songbirds

The Miracle of Migrating Songbirds

Even with all these adaptions, migration takes a toll on birds. Half of all migrating birds heading south for the winter will not return in the spring, say experts. One flight may exhaust a bird's entire fat reserve, and they will need to replenish their supply before moving on. They must find a source of stable food where they can quickly replenish their fat supplies. However, continual loss of habitat is probably the greatest threat birds face during migration. As birds fly south during fall migration, they often find their forests fragmented or clear-cut for farming. According to Wild Birds Unlimited, declines in the number of neotropical migratory bird species has been recorded over the past decades due to fragmentation of breeding habitat and destruction of tropical forests on wintering grounds. Migrating birds need reliable food sources, shelter from predators, and w...

Full article: http://www.environmentalgraffiti.com/animals/news-songbir...

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On Our Radar: Migrating Songbirds Vanish in Bri...

green.blogs.nytimes.com 25 Apr '11, 7pm

On Our Radar: Migrating Songbirds Vanish in Britain By JOHN COLLINS RUDOLF British ornithologists record dramatic declines...