Bill color is dynamic across the breeding season but not condition-dependent in Atlantic puffins https://www.biorxiv.org/content/10.1101/2023.04.11.536353v1?med=mas
Bill color is dynamic across the breeding season but not condition-dependent in Atlantic puffins https://www.biorxiv.org/content/10.1101/2023.04.11.536353v1?med=mas