Grote Tafeleend
Aythya valisineria · Canvasback
| id | 30074 | |
|---|---|---|
| datum | 30 september 2006 t/m 13 februari 2007: 137 dagen | |
| gekoppeld aan | 30076 | |
| gemeente | Castricum (NH) | |
| locatie | Hoefijzermeer | |
| coördinaten | N 52.54044 O 4.6203 | |
| aantal, kleed | 1 | |
| soort waarneming | veldwaarneming | |
| status | Niet aanvaard, gepubliceerd in jaarverslag CDNA | |
| opmerkingen | Jaarverslag 2009: adult male, photographed, videoed (Reijnders & Ebels 2004; Birdwatch 12 nr 128: 62, 2003, Birding World 16: 10, 2003, 17: 23, 2004, Dutch Birding 25: 74, plate 60-61, 133, plate 121, 140, plate 133, 2003, 26: 181, plate 249, 182, plate 250-252, 2004, 27: 431, plate 540, 2005, 28: 396, plate 566, 2006, 30: 50, plate 64, 2008; @ the CDNA reconsidered this record after photographs showed the bird had a wing-clip; see main text: The CDNA reviewed the record of an adult male at Noordhollands Duinreservaat, Castricum, Noord-Holland, in most winters from January 2003 to at least 15 November 2009 (it was not seen in the winters of 2003/04 and 2004/05). Photographs taken in January 2008 (five years after its first sighting!) showed that the bird wore a metal wing-clip (most likely the remains of a wing-tag) on its left wing for which the CDNA was not able to retrace the origin, despite extensive research. The wing-clip may have been applied either on a wild bird trapped for research or a bird in captivity. However, it is certain that the bird has been handled by men and, in combination with the uncertain origin of the wing-clip, the CDNA concluded this individual no longer acceptable. The CDNA is, however, still anxious to receive any information on the use of wing-tags especially in wild Nearctic Aythya ducks. 2003.01.09-2003.03.05 / 2005.10.14-2005.11.08 / 2006.09.30-2007.02.13 / 2007.09.27-2008.02.17 / 2008.08.22-2008.11.22 | |
| gekoppelde gevallen | 30076 |
9 januari t/m 5 maart 2003 Castricum (NH) Hoefijzermeer |
| 30075 |
14 oktober t/m 8 november 2005 Castricum (NH) Hoefijzermeer |
|
| 30074 |
30 september 2006 t/m 13 februari 2007 Castricum (NH) Hoefijzermeer |
|
| 30073 |
27 september 2007 t/m 17 februari 2008 Castricum (NH) Hoefijzermeer |
|
| 30072 |
22 augustus t/m 22 november 2008 Castricum (NH) Hoefijzermeer |
|
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