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Male red-billed quelas develop colorful red or yellow feathers during breeding season to attract mates, though their offspring success does not depend on feather color. It was originally thought brighter red meant a better diet, but one study found feather color was inherited from fathers, not influenced by diet. While females were thought to prefer red males, the criteria for sexual selection is not fully met since female plumage does not change and offspring counts remain equal across male colors.
- Author
- Bob
- Language
- EN