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Primary moult in non-breeding second-calendar-year Swifts Apus apus during summer in Europe

Joop Jukema, Auteur ; Henk van de Wetering, Auteur ; Raymond H.G. Klaassen, Auteur

Dans Ringing & Migration (30(1) janvier 2, 2015)

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 almos[...]

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Article

Slight sexual dimorphism in tail-fork depth of Common Swifts Apus apus

Joop Jukema, Auteur ; Henk van de Wetering, Auteur ; Jorge S. Gutiérrez, Auteur ; Theunis Piersma, Auteur

Dans Ringing & Migration (38(1-2) 2023-07-03)

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