Ornithology

Molt

털갈이

Definition

The periodic shedding and regrowth of feathers in birds, necessary for maintaining flight capability and appearance.

Detailed Explanation

Molt is energetically costly and temporarily reduces flight capability — many birds become secretive and flightless during simultaneous primary feather molt. Molt timing is carefully timed to avoid overlap with breeding and migration. Feather color changes between breeding and non-breeding plumage are often achieved through molt rather than color change — the brilliant breeding plumage of warblers is grown in late winter before spring migration.

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