Adult Eastern Caspian Gull (Larus cachinnans
cachinnans) among adult barabensis gulls, photographed
by Martin Reid in Bahrain, early March 1999. Compared to barabensis,
note the slightly paler mantle, less-round head shape, paler bill,
and larger P10 mirror; compared to ponticus the mantle
is darker and the black subterminal tip to P10 is too large:
