The use of primary abrasion in ageing Siskins Carduelis spinus

Publication Type:Journal Article
Year of Publication:1996
Authors:Martin, A
Journal:Ringing & Migration
Volume:17
Issue:1
Date Published:1996
ISBN Number:0307-8698
Keywords:Carduelis, Carduelis Spinus, Fringillidae, Spinus, Spinus spinus
Abstract:This paper presents information regarding the use of primary abrasion for ageing Siskins. 96% of the Siskins examined could be aged from the degree of primary wear, juvenile outer primaries usually being more abraded than adults. A four point scale was used to classify the degree of abrasion. This ageing technique may be useful for other species of passerines that undergo a partial post?juvenile moult and the adults a complete post?breeding moult.This paper presents information regarding the use of primary abrasion for ageing Siskins. 96% of the Siskins examined could be aged from the degree of primary wear, juvenile outer primaries usually being more abraded than adults. A four point scale was used to classify the degree of abrasion. This ageing technique may be useful for other species of passerines that undergo a partial post?juvenile moult and the adults a complete post?breeding moult.
URL:http://dx.doi.org/10.1080/03078698.1996.9674119
Short Title:Ringing & Migration
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