Forum > Birds In The News > 'Green Wave' Explains Migratory Bird Routes

Webmaster Posted 10-Sep-2014 19:02
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From Science Daily on 10-Sep-2014 19:02

Bird migrations follow areas of new plant growth -- a so-called 'green wave' of new leaves and numerous insects -- research shows. In fall, particularly in the western US, they stick to higher elevations and head directly southward, making fewer detours along the way for food.


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