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1

This example proves IMHO that migration is largely nature and not nurture: In the Netherlands, white storks were bred / reintroduced. A large part (about one third?) of the reintroduced birds do not migrate, but their offspring usually does migrate see. They couldn't have learned it from their parents, that's for sure.


0

It seems as though it is named for feathers below the beak that have a barblike appearance, rather than actual barbs. It may be clearer from these images: India Nature Watch Or in this photo: SivamDesign - Flickr



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