Bonaparte's Gull standing on wall, Farmoor Reservoir

Farmoor Reservoir, Farmoor, Oxfordshire (April 2017)

Status is Least Concern. Vagrant from North America. Images of this gull taken in Canada can be viewed here. For more information on this bird species see the following links:
Bonaparte's Gull (Larus philadelphia) / Internet Bird Collection
Bonaparte's Gull / Bird Forum
BirdLife International / Bonaparte's Gull Larus philadelphia
Bonaparte's gull (Larus philadelphia) / ARKive

Shooting Time 08:38
Tv(Shutter Speed) 1/2000
Av(Aperture Value) 9.0
Exposure Compensation -1/3
ISO Speed 640

Latitude 51 44 42.8 N
Longitude 01 21 15.1 W
Altitude 82.20m