Unfortunately don't have the wide expanse of wildlife in South London but thought I'd add a few as I'm still getting used to this DSLR lark and the lenses.
Luckily have a lake outside of work which had a pair of nesting swans - the male showed off to anyone going near.
Minolta 7D Tokina 80-200 Shot at 200mm F5 at 1/2000sec ISO 100
Recently have a couple of Ruddy Ducks on the lake with their bright blue beaks. Unfortunately they are quite shy and had to shoot at 500mm and then crop
Minolta 7D Tamron 200-500 Shot at 500mm F6.3 at 1/125 sec ISO 200
Trying out the Tamron 200-500 for the first time in mother-in-laws garden some young blackbirds where being fairly helpful .
Minolta 7D Tamron 200-500 Shot at 300mm F5.6 at 1/125 sec ISO 100
Minolta 7D Tamron 200-500 Shot at 500mm F6.3 at 1/80 sec ISO 200
This final entry was more an example of how good I think the 100mm f2.8 macro lens is. I took my daughter to the London Butterfly house and only took the 100mm macro lens along. Having filled a 2GB card with butterflies went in to their avery and took a few photos of the birds. I loved the colour of this bird and the pose but what impressed me most was that this is cropped to about third of original size, as I couldn't get close enough to fill the frame, but even at 200% the image quality is still pretty good
Minolta 7D Minolta 100mm F2.8 Macro Shot at 100mm F2.8 at 1/80 sec ISO 200