Migrations: Molt Migration
At the end of summer, the once-bright feathers of a male American Goldfinch look ragged. Growing new flight feathers in a process called molting makes him more vulnerable to predators. Before migrating to wintering grounds, many songbirds stop at a secondary location to undergo the indignities of molting. It’s called molt migration. The places birds go to molt could be important targets for conservation efforts.
More info and transcript at BirdNote.org.
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