In
my limited experience of Pallas's Gull this species seems to be a
nocturnal feeder in much the same way as Audoin's
Gull. In the eastern Mediterranean off the coast of Israel
I have almost only seen this species during the hours of darkness (January 2010 and January 2011). Needless
to say this presented some photographic difficulties - the images below
were shot at ISO3200 and 1/15 of a second - even after underexposing as
much as possible. With a handheld 400mm lens on a moving boat the
results speak for themselves...
Above
and below, Pallas's Gull feeding at night, off Israel,
January 2011
The following book takes
a lot of the mystery of gull identification: