Bang pu
November 2002
Bang Pu 17 Nov
2002,
I found one Slender-billed Gull (pinkish underparts) . It rested in the group
of Brown-headed Gulls.
Bang pu 24 Nov 2002 , I found two Heulin's Gull.In the picture above it was sleeping on the water.
When a Heulin's
flied to escape from a Brown-headed . The picture below show the bill began
changing
from all black to pinkish at base.
