La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Age determination of Jack Snipe by plumage characteristics (2017)
Auteurs :	Michel Devort, Auteur ; Gilles Leray, Auteur ; Yves Ferrand, Auteur
Type de document :	Article
Dans :	Wader Study (124(1) April, 2017)
Article en page(s) :	60-65
Résumé :	We develop a method to age Jack Snipe Lymnocryptes minimus during autumn using outer tail feathers. This method was tested by also ageing birds through the presence/absence of the bursa of Fabricius. The pattern on the tip of the outer tail feathers allowed reliable age discrimination of more than 80% of adults and juveniles sampled. Most adults had a single pale spot on the external side of the outer tail feather whereas juveniles displayed a narrow black line separating two pale spots. Overall, we describe two adult patterns and four juvenile patterns. The validity of the resulting ageing key was tested and confirmed using volunteer ringers.

Lundi , mardi et jeudi de 9h à 12h et de 13h à 17h00 : ouverture au public ...