KLEYHEEG E, DIRKEN S †, VAN BEUSEKOM R, EGGENHUIZEN T, JONKERS D, KOFFIJBERG K, MAJOOR F & NAGTEGAAL J Moulting Ruddy Shelducks Tadorna ferruginea in the Netherlands: numbers, origin and ecology
[samenvatting] [summary] [pdf only for members]

ALTENBURG JF & BOUDEWIJN TJ Barn Swallow Hirundo rustica predation by Tawny Owl Strix aluco
[samenvatting] [summary] [pdf only for members]

KLEEFSTRA R Going out on a moonlit night: nocturnal foraging by White-fronted Geese Anser albifrons and Barnacle Geese Branta leucopsis in relation to new and full moon
[samenvatting] [summary] [pdf only for members]

OOSTERHUIS R Dramatic decline of Eurasian Tree Sparrow Passer montanus in Groningen, the Netherlands
[samenvatting] [summary] [pdf only for members]

KLEEFSTRA R Andermans Veren
[samenvatting] [summary] [pdf only for members]

VAN DEN BREMER L, VAN TURNHOUT C, PIERSMA T, NIENHUIS J & DE JONG A Breeding performance of Dutch House Martins Delichon urbicum
[samenvatting] [summary] [pdf only for members]

Netherlands ornithological Union
[samenvatting] [summary] [pdf only for members]