Denne eftermiddag fangede jeg denne han gul vipstjert. Bemærkede straks at den havde knaldgult øjenbryn og manglede gråt på hovedet. Det eneste grå var 3-4 fjer bag hvert øje. De 2k+ flava jeg har fanget den seneste tid har alle været ekstremt slidte, mens denne fugl allerede havde overstået sin fældning. Fuglen blev bestemt til en flavissima og er dermed ny ringmærkningsrace for DK. Fuglen var formentlig en 2k (rettet til 1k) og vingemålet på 88,5 overstiger ifølge Svensson både målene for flava og flavissima.
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Kommentarer:
Yoav Perlman skriver onsdag 17. august 2011 kl. 20.35
Hi Jesper,
I would begin with ageing the bird correctly - by the GC pattern (somewhat difficult to see from these images - white tips, sharply demarcated) this looks like a 1cy. 2cy should have a pattern similar to that on MC in this bird.
I could imagine a 1cy male flava looking like this.
Best, Yoav.
Jan Jörgensen skriver onsdag 17. august 2011 kl. 21.40
I agree with Yoav that this Yellow Wagtail looks like a 1cy, which has moulted all (as it seems) median coverts but with reatained juvenile greater coverts with whitish tips sharply set of against the dark centres, however, with yellowish edges on this one.
Thanks for your comments!
I now aggree that this bird is a 1cy! I was confused about how yellow this bird is, and the other flava 1cy I caught the last days are still in juvenile plumage! The other ringers at Gedser and I had never caught or seen a 1cy flava as yellow as this bird, but the variation in flava seems rather large.
Can any of you refer to photos of 1cy male flava/flavissima from this time of the year? It would be good to study in further detail!
Jesper Brinkmann
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English version
Yoav Perlman skriver onsdag 17. august 2011 kl. 20.35 