thayeri / L. glaucoides kumlieni
January 30th and February 28th
2012 Choshi Chiba Japan
gull also seems to be the same individual as another
one considered as kumlieni in 2009 ('Sangou'). This also has
grown into a darker bird than we expected, and currently looks like a
hybrid/intergrade between thayeri and kumlieni. We will
keep our eyes open to watch next year whether
this individual will get paler than this or not.
The wing pattern is quite subtle. The
dark markings of the left wing look 5 pieces, 10-P6. But on the left wing,
the outer web of P5 (-6th from the outermost) has a tiny dot. The dark band
of P6 is grayish, and is divided by a white shaft. White mirror on P9
slightly spreads out to the outer web on the left wing, but is restricted
to the inner web on the right wing.
The same individual on February 28th.
Vega Gulls and a 'Taimyr Gull'.
like kumlieni in this shot.
1st winter in 2009
(left), 4th winter in 2012 (right), presumed the same
For comparison: Kumlien's Iceland
kumleni at Niagara Canada in