thayers gull
white upperparts grey wings with black tips black legs and feet yellow bill dark eyes black hood that runs from the eyes to the back of the head pale grey underparts dark grey tail white rump patch
thayers gull which has white upperparts thayers gull which has grey wings with black tips thayers gull which has black legs and feet thayers gull which has yellow bill thayers gull which has dark eyes thayers gull which has black hood that runs from the eyes to the back of the head thayers gull which has pale grey underparts thayers gull which has dark grey tail thayers gull which has white rump patch