Quote:
Original posted by lpaul at 15/04/2010 08:50 
Such birds are gutteralis/tytleri intergrades (sometimes in the past treated as a distinct subspecies 'saturata') and as such are almost certainly from ne China/Kamchatka/Lower Amur. Such birds have ...
Hi Paul,
Thanks for your sharing and information!
And I have a doubt for a long time that I sometimes saw some Barn Swallow juvenile with rufous underpart, but both of the parent are without rufous underpart, just like the photo show in the link.
http://www.hkbws.org.hk/BBS/viewthread.php?tid=11232
Does it mean "rufous underpart" maybe show in young stage, although the barn swallow is the offsprings of subspecies
"gutteralis"?
And how about this one? Is it
tytleri?
http://www.hkbws.org.hk/BBS/viewthread.php?tid=1972&extra=page%3D3
Thanks again!
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Last edited by Sze at 15/04/2010 14:17 ]
