TY - JOUR
T1 - Primary moult in non-breeding second-calendar-year Swifts Apus apus during summer in Europe
AU - Jukema, Joop
AU - van de Wetering, Henk
AU - Klaassen, Raymond H G
PY - 2015/1/2
Y1 - 2015/1/2
N2 - Little is known about the extent of primary moult in non-breeding second-calendar-year Swifts during summer in Europe. A sample of 352 Swifts of this age group was captured during May–July in a village in the Netherlands. Primary moult was almost completely restricted to July. During the first and second halves of July, respectively, 20% and 60% of the second-calendar-year Swifts were moulting. Moult was restricted to the first four inner primaries, but 62% of individuals moulted the innermost primary only. Surprisingly, in 63% of moulting birds, primary moult was asymmetric.
AB - Little is known about the extent of primary moult in non-breeding second-calendar-year Swifts during summer in Europe. A sample of 352 Swifts of this age group was captured during May–July in a village in the Netherlands. Primary moult was almost completely restricted to July. During the first and second halves of July, respectively, 20% and 60% of the second-calendar-year Swifts were moulting. Moult was restricted to the first four inner primaries, but 62% of individuals moulted the innermost primary only. Surprisingly, in 63% of moulting birds, primary moult was asymmetric.
UR - http://www.scopus.com/inward/record.url?scp=84936883075&partnerID=8YFLogxK
U2 - 10.1080/03078698.2015.1059632
DO - 10.1080/03078698.2015.1059632
M3 - Article
AN - SCOPUS:84936883075
SN - 0307-8698
VL - 30
SP - 1
EP - 6
JO - Ringing & Migration
JF - Ringing & Migration
IS - 1
ER -