La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Primary moult, mass and movements of the Rock Pigeon Columba Guinea in the Western Cape, South Africa
Auteurs :	L. G. Underhill, Auteur ; G. D. Underhill, Auteur
Type de document :	Article
Dans :	Ostrich (68(2-4) JUN-DEC 1997)
Article en page(s) :	86-89
Langues:	Anglais
Résumé :	Rock Pigeons Columba guinea in the Western Cape, South Africa, take an estimated 7.2 months to complete primary moult. The mean starting and completion dates are 26 December and 2 August, with 95% of birds starting and completing within two months of these dates. The overall mean mass was 344 S, but birds were heaviest in winter (356 g) and lightest in spring and summer (334 g). Twenty-four of 48 recoveries of Rock Pigeons ringed in the Western Cape were more than 2 km from the ringing site. These recoveries demonstrate movements of Rock Pigeons between the mountains of the Cape Peninsula and the wheat-growing areas to the northeast.

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