catastrophic moult
The term "catastrophic moult" describes a dramatic shedding and regrowth process in certain animals, notably penguins and seals, which renders them temporarily vulnerable.
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Definition
C1Ornithology
(technical)A process where birds, especially penguins, shed most or all of their feathers simultaneously, leaving them unable to fly and vulnerable until regrowth.
Example
- During a catastrophic moult, penguins stay on land as they cannot swim without their feathers.
C1Zoology
(technical)A process in some seals where large areas of skin and fur are shed at once, resulting in a period of increased vulnerability.
Example
- Seals undergo a catastrophic moult, during which they lose large patches of fur and skin.