This adult Caspian Gull (Larus cachinnans)
was photographed by Martin Reid in Bahrain, early March 1999.
The extensive gray tongue on the inner web of P8 (plus the similar
tongue visible on the underside of P10) would seem to rule out
barabensis, thus the large black tip to P10, extensive
black bleeding into the inner web of P9, and small black notch
on P3 point towards this being the eastern form of Caspian Gull,
cachinnans; this is supported by the similar gray tone
of the bird immediately behind this individual - a single-mirrored
barabensis:
