La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Sexual dimorphism in the birds from southern Veracruz, Mexico, and other localities. III. Wilson's Warbler (Wilsonia pusilla)
Auteurs :	J. J. Weicker, Auteur ; K. Winker, Auteur
Type de document :	Article
Dans :	Journal of Field Ornithology (73(1) Winter, 2002)
Article en page(s) :	62-69
Langues:	Anglais
Résumé :	Using museum specimens from Mexico, Canada, and the western United States, we examined sexual dimorphism in the Wilson's Warbler (Wilsonia pusilla), a Nearctic-Neotropic migrant (Passeriformes: Parulidae). On average, males had longer tails, wing chords, and eighth and ninth primaries than females. Three methods for quantifying cap plumage showed that differences in cap size and pattern alone could not definitively separate the sexes. Discriminant functions are presented for sexing individuals using cap category, cap length, wing chord, tail length, and ninth primary length. More specific functions are provided fur samples from Alaska and eastern Mexico. For each group, equations are included for assigning individual probabilities of belonging to either sex.

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