7

Giervalk

Falco rusticolus  ·  Gyrfalcon

id 4223
datum 13 november 2004
gemeente Noardeast-Fryslân (FR)
locatie Holwerd
coördinaten N 53.38537  O 5.8831
aantal, kleed 1, juveniel
soort waarneming veldwaarneming
status Aanvaard, gepubliceerd in jaarverslag CDNA
waarnemer(s) D.M. Brinkhuizen, E. de Weerd, P.W. van Wetter et al
opmerkingen 13 November, Holwerd, Dongeradeel, Friesland, photographed (D M Brinkhuizen, E de Weerd, P W van Wetter; Brinkhuizen et al 2004a; Dutch Birding 26: 433, plate 611, 2004), and 19-20 December, Tibma, Dongeradeel, Friesland, juvenile, dark morph, photographed (A Hidding, E Douwma, O Tol; Douwma & Tol 2005; Dutch Birding 27: 83, plate 100, 2004). This bird was very elusive and could not be twitched. It is still under investigation whether one bird or two were involved; for the time being, it is regarded here as one. Previous records were in October 1849, December 1864, December 1900, December 1909, January-April 1987 and March 1998. The 1909 and 1998 birds were white morphs, all others were dark morphs. Annual Report 2004 and 2005.
gekoppelde gevallen 4223 13 november 2004
Noardeast-Fryslân (FR) Holwerd
4224 19 t/m 20 december 2004
Noardeast-Fryslân (FR) Tibma

DB 26:433 Giervalk bij Holwerd

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