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LENSINK R, VAN TURNHOUT, C., BAKHUIZEN JJ, BOELE A, VAN DONGEN R, FOPPEN R, HULSEBOS B, LANJOUW R, RADEMAKER J & WOUDA S Increase and expansion of Middle Spotted Woodpecker Dendropicos medius in the Netherlands in 1995-2020: a textbook example of an invasion
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VAN DIJK AJ Breeding Whooper Swans Cygnus cygnus in the province of Drenthe closely followed: observations on distribution, breeding and moulting in 2005-2021
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KLEEFSTRA R, HOOIJMEIJER J & NIJLAND F Geese on night roosts in the province of Friesland in 1996/97-2016/17
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KLEEFSTRA R Interesting literature
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NOU
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