Migrating Red-winged Blackbirds

Red-winged blackbirds gather in large migratory groups in early evening to roost in tall vegetation of prairies, marshes or even cornfields.  They are one of the most widespread birds in North America with a population approaching 200 million birds.   Masses of birds often lift out of vegetation only to settle down a hundred yards distant.  This behavior may occur over and over again until darkness descends.

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