moult in 1cy

[Ruud Altenburg]

Better check the provided links before posting a cunning question Here's a sightly improved picture of W-947X

[lou bertalan]

hi,

2nd gen. GC and TT and some 3rd gen. scapulars in this michahellis from yesterday, bucharest, pic by cristian: http://www.birdforum.net/attachment.php ... 1262127200
on first view i was a bit surprised about that GC pattern...
many plain grey lookiong scpulars in this ind. also (and 2nd gen TT), same place and date: http://www.birdforum.net/attachment.php ... 1262126552

to me these look like 1cy YLG with pale underparts, what do you think?
http://www.birdforum.net/attachment.php ... 1262126863
http://www.birdforum.net/attachment.php ... 1262126581

lou

[Cristian Mihai]

Another pic with the same bird here.

[lou bertalan]

that tertial pattern is quite odd.

[marsmuusse]

Birds with strong transversal bars on the tertials and coverts sometimes occur in S France as well:
ring white 142P:
http://www.gull-research.org/ylg1cy2cy/ ... ha142p.htm

Just imagine that the grey tones are more bleached, turning whitish, and the pattern is rather similar?

[lou bertalan]

regular transversal bars surely are ok like in this bird,

1 2009.01.17 tineretului cm 9902m - Kopie.jpg (150.96KiB)Viewed 7073 times

but the bird in question shows a complicated filigran pattern well inside the "core" of the tertial. surely it's a 1cy and surely GC are 2nd generation (with a 'fitting' pattern) but then there's also a tiny mirror like spot on p10 - i wonder if such birds could be of hybridish blood (e.g. with caspian) but of course this remains speculation untill they're ringed.

[lou bertalan]

i thought i'd post dimitris' pics here as well since it is about postjuvenile moult in 1cy YLG - including primaries in this case! athens, 27.12.2009

initial thread: viewtopic.php?f=3&t=158

first 3 pics are of another advanced bird taken (not moulting primaries but with active rectrices moult) taken 3.1.2010