La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Biometric differences between Common Terns Sterna hirundo and Arctic Terns S. paradisaea
Auteurs :	J. C. A. Craik, Auteur
Type de document :	Article
Dans :	Ringing & Migration (19(1) May, 1998)
Article en page(s) :	75-78
Résumé :	Significant differences were found in statistical comparisons of adult Common Terns and Arctic Terns. Common Terns were heavier and had higher values of bill + head length, wing breadth and wing area. Although Arctic Terns were smaller than Common Terns in most measurements, they had significantly longer outer wings (wing length as normally measured by ringers). Differences between the species in total wing length (wing tip to body) and in wing loading (body weight/wing area) were not significant. These differences, especially the longer outer wing and lighter weight of the Arctic Tern, can be related qualitatively to the flight characteristics and habitat preferences of each species.

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