St. James's Park: Ross'sling and Sibling
Curvier creatures in large.
Smew (m) portrait
Wood pigeon hiding?
Pretty putty-coloured pigeon
Incoming heron (1/2)
Struggled to choose between a smew (posing and diving), various pretty pretty pigeons, and a heron in flight, but, frankly, "Long time, no [Ross'sling]"...
Others here (or right from Angry pigeon on weather station)