X Vega Gull Larus
schistisagus X L. vegae
This 2nd winter gull shows intermediate
characteristcs between Slaty-backed Gull and Vega Gull.
The mantle looks obviously paler than that
of Black-tailed Gulls, thus it seems too pale for pure Slaty-backed
mantle looked very similar to that of the Vega Gull in the background. But
its other features such as head structure and pale iris looked very like
The presumed hybrid in the center, with one
Slaty-backed Gull on the right, one Vega Gull and two Black-tailed Gulls
in the background.
The primaries look nearly black in the Vega
Gull, brownish in the Slaty-backed Gull, intermediate in the presumed
tail pattern was very like Slaty-backed Gull rather than Vega Gull.