I've knocked off a few birds and one butterfly about which I am now skeptical.
Birds:
1. Great Crested Grebe
2. Mute Swan
3. Coot
4. Lesser Black-Backed Gull
5. Blue Tit
6 Tufted Duck
7 Blackbird
8. Black-Headed Gull
9. Canada Goose
10. Pied Wagtail
11. Cormorant
12. Magpie
13. Carrion Crow
14. Mallard
15. Moorhen
16. Common Gull
17. Feral Pigeon
18. Grey Wagtail
19. Woodpigeon
20. Robin
21. Great Spotted Woodpecker
22. House Sparrow
23. Goldfinch
24. Starling
25. Great Tit
26. Greylag Goose
27. Long-Tailed Tit
28. Wren
29. Herring Gull
30. Chaffinch
31. Kingfisher
32. Greenfinch
33. Great Black-Backed Gull
34. Dunnock
35. Siskin
36. Grey Heron
37. Jay
38. Mistle Thrush
39. Sparrowhawk
40. Blackcap
41. Sedge Warbler
42. Swallow
43. Swift
44. Common Tern
45. House Martin
46. Reed Warbler
47. Green Woodpecker
48. Willow Warbler
49. Reed Bunting
50. Black Swan
51. Redwing
Butterflies:
1. Small White
2. Speckled Wood
3. Common Blue
4. Brimstone
5. Large White
6. Comma
7. Red Admiral
8. Holly Blue
9. Tortoiseshell
10. Meadow Brown
11. Gatekeeper
Mammals:
1. Grey Squirrel
2. Fox
3. Pipistrelle
4. Daubenton's Bat
5. Brown Rat
Amphibians:
1. Common Frog
2. Common Toad
Reptiles:
1. Red-Eared Terrapin
2. Smooth Soft-Shell Turtle
So the final score is 51 birds, 11 butterflies, 5 mammals, 2 amphibians and 2 reptiles, for a grand total of 71 species. The winner of
this poll is thus, ahem,
drplokta.