Auteur(s): Craig R. White, Graham R. Martin and Patrick J. Butler
Bron: JOURNAL OF AVIAN BIOLOGY 39 (5): 576-578 SEP 2008
Abstract: Wing-spreading of cormorants (Phalacrocoracidae) is a characteristic and enigmatic aspect of their behavioural repertoire. It has been suggested to have a range of functions including wing-drying, food-warming, and social signalling of foraging success. We investigated two of these putative roles by comparing the wing-spreading behaviour of fed and unfed animals after they had been swimming and diving. The duration of wing-spreading was correlated only with time spent on the water. The ingestion of food did not influence the duration of wing-spreading, a finding that supports a wing-drying, rather than a food-warming, function.
Bron: JOURNAL OF AVIAN BIOLOGY 39 (5): 576-578 SEP 2008
Abstract: Wing-spreading of cormorants (Phalacrocoracidae) is a characteristic and enigmatic aspect of their behavioural repertoire. It has been suggested to have a range of functions including wing-drying, food-warming, and social signalling of foraging success. We investigated two of these putative roles by comparing the wing-spreading behaviour of fed and unfed animals after they had been swimming and diving. The duration of wing-spreading was correlated only with time spent on the water. The ingestion of food did not influence the duration of wing-spreading, a finding that supports a wing-drying, rather than a food-warming, function.
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