Oldbury Power Station annual bird species
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Years seen in last 10 years % years seen in last 10 Years seen  1979-2005* % years seen 1979-2005 Difference in % Years seen since 1979
American Wigeon         1                       1 10% 0 0% 10% 1
Arctic Skua 1 1 1 1 1 1 1   1 1 1 1 1 1 1   9 90% 2 8% 82% 16
Arctic Tern 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 1 4% 96% 17
Avocet 1 1 1 1 1 1 1 1 1 1     1 1   1 10 100% 7 27% 73% 20
Barn Owl 1 1 1   1   1 1 1 1 1 1       1 8 80% 3 12% 68% 14
Barnacle Goose 1 1 1   1   1         1         5 50% 3 12% 38% 9
Bar-tailed Godwit 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Bean Goose (Taiga)                                 0 0% 1 4% -4% 1
Bean Goose (Tundra)   1                             1 10% 0 0% 10% 1
Bearded Tit             1             1     1 10% 0 0% 10% 2
Bewick's Swan 1         1   1 1     1 1 1     4 40% 15 58% -18% 22
Bittern                                 0 0% 1 4% -4% 1
Black Redstart 1 1 1 1 1 1 1 1 1 1   1 1 1 1 1 10 100% 9 35% 65% 24
Black Tern           1     1 1   1   1   1 3 30% 6 23% 7% 12
Blackbird 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Blackcap 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Black-headed Gull 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Black-necked Grebe                                 0 0% 2 8% -8% 2
Black-tailed Godwit 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Black-winged Stilt                                 0 0% 1 4% -4% 1
Blue Tit 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Brambling 1 1 1 1 1 1 1   1 1 1 1         9 90% 10+ 38% 52% 21
Brent Goose 1   1 1 1     1     1   1   1   5 50% 5 19% 31% 13
Broad-billed Sandpiper                                 0 0% 1 4% -4% 1
Bullfinch 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Buzzard 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Canada Goose 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 10 38% 62% 26
Carrion Crow 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Cattle Egret 1                               1 10% 0 0% 10% 1
Cett's Warbler 1 1 1 1 1 1 1 1 1             1 9 90% 2 8% 82% 12
Chaffinch 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Chiffchaff 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Coal Tit 1 1 1 1 1 1 1   1   1 1       1 8 80% 20+ 77% 3% 31
Collared Dove 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 10+ 38% 62% 26
Common Crane           1 1 1 1         1     4 40% 0 0% 40% 5
Common Gull 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Common Redpoll   1             1       1       2 20% 0 0% 20% 3
Common Sandpiper 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Common Scoter 1 1 1 1     1   1       1 1 1   6 60% 6 23% 37% 15
Common Tern 1 1 1 1 1 1 1 1 1 1 1   1 1 1   10 100% 26 100% 0% 40
Coot 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Cormorant 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Corn Bunting 1 1 1 1                 1   1   4 40% 1 4% 36% 7
Crossbill 1 1 1 1 1   1   1 1 1 1         8 80% 0 0% 80% 10
Cuckoo 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 20+ 77% 23% 36
Curlew 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Curlew Sandpiper 1 1 1 1 1 1   1 1 1 1 1 1 1 1 1 9 90% 26 100% -10% 41
Dotterel               1                 1 10% 0 0% 10% 1
Dunlin 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Dunnock 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Egyptian Goose 1 1 1 1                       1 4 40% 1 4% 36% 6
Eider                                 0 0% 2 8% -8% 2
Feral Pigeon 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Fieldfare 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Firecrest     1       1   1   1     1     3 30% 0 0% 30% 5
Fulmar     1 1             1         1 2 20% 0 0% 20% 4
Gadwall 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Gannet 1   1   1   1 1 1 1 1           7 70% 3 12% 58% 11
Garden Warbler 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 20+ 77% 23% 36
Garganey   1     1       1 1 1 1   1 1 1 4 40% 4 15% 25% 13
Glaucous Gull 1                               1 10% 1 4% 6% 2
Goldcrest 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Golden Plover 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% c13 50% 50% 29
Goldeneye                     1       1 1 0 0% 20 77% -77% 23
Goldfinch 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Goosander 1       1 1 1     1   1 1       5 50% 2 8% 42% 9
Goshawk 1 1 1 1     1   1               6 60% 2 8% 52% 8
Grasshopper Warbler 1 1 1 1 1 1 1 1 1 1 1 1   1 1   10 100% 5+ 19% 81% 19
Great Black-backed Gull 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Great Bustard                           1     0 0% 0 0% 0% 1
Great Crested Grebe 1 1 1 1 1     1           1 1 1 6 60% 7 27% 33% 16
Great Northern Diver 1                               1 10% 1 4% 6% 2
Great Skua 1   1 1 1 1 1 1 1   1 1     1 1 8 80% 2 8% 72% 14
Great Spotted Woodpecker 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Great Tit 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Great White Egret 1 1 1 1 1 1 1                   7 70% 0 0% 70% 7
Green Sandpiper 1 1 1 1 1 1 1 1   1 1   1 1 1 1 9 90% 20+ 77% 13% 34
Green Woodpecker 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 14 54% 46% 30
Greenfinch 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Greenshank 1 1 1 1 1 1   1 1 1 1 1 1 1 1 1 9 90% 26 100% -10% 41
Green-winged Teal                       1         0 0% 1 4% -4% 2
Grey Heron 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Grey Partridge                                 0 0% 3 12% -12% 3
Grey Phalarope   1   1     1   1               4 40% 4 15% 25% 8
Grey Plover 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Grey Wagtail 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Greylag Goose 1 1 1 1 1 1 1 1   1 1 1 1 1 1 1 9 90% 8 31% 59% 23
Guillemot       1 1     1 1 1           1 5 50% 1 4% 46% 7
Hawfinch 1   1 1 1   1   1 1 1           7 70% 1 4% 66% 9
Hen Harrier 1       1   1     1   1 1 1 1   4 40% 0 0% 40% 8
Herring Gull 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Hobby 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 13 50% 50% 29
Hoopoe   1                 1           1 10% 0 0% 10% 2
House Martin 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
House Sparrow 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Iceland Gull     1                           1 10% 5 19% -9% 6
Jack Snipe 1   1 1 1 1 1 1 1 1   1 1 1 1 1 9 90% 14 54% 36% 28
Jackdaw 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Jay 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 20+ 77% 23% 36
Kentish Plover                                 0 0% 1 4% -4% 1
Kestrel 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Kingfisher 1 1 1 1 1 1 1 1 1 1   1 1 1 1 1 10 100% 4+ 15% 85% 19
Kittiwake 1 1 1 1 1 1 1 1 1 1       1   1 10 100% 13+ 50% 50% 25
Knot 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 20+ 77% 23% 36
Lapland Bunting                       1         0 0% 0 0% 0% 1
Lapwing 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Lesser Black-backed Gull 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Lesser Redpoll 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Lesser Spotted Woodpecker     1                           1 10% 1 4% 6% 2
Lesser Whitethroat 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Linnet 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Little Auk                                 0 0% 1 4% -4% 1
Little Bunting 1                               1 10% 0 0% 10% 1
Little Egret 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 6 23% 77% 22
Little Grebe 1 1 1 1 1 1 1 1 1 1 1 1 1 1   1 10 100% 26 100% 0% 41
Little Gull   1 1 1 1 1   1 1 1 1       1 1 8 80% 5 19% 61% 16
Little Owl 1                 1   1 1 1 1 1 2 20% 20+ 77% -57% 27
Little Ringed Plover 1       1   1 1   1 1 1 1 1 1   5 50% 20+ 77% -27% 30
Little Stint 1         1       1   1 1 1 1 1 3 30% 20+ 77% -47% 28
Little Tern         1 1 1     1   1   1     4 40% 3 12% 28% 9
Long-eared Owl                                 0 0% 7+ 27% -27% 7
Long-tailed Duck                                 0 0% 5 19% -19% 5
Long-tailed Skua                           1     0 0% 0 0% 0% 1
Long-tailed Tit 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Magpie 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 16 62% 38% 32
Mallard 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Mandarin Duck 1       1 1 1           1     1 4 40% 4 15% 25% 10
Manx Shearwater   1     1           1 1         2 20% 2 8% 12% 6
Marsh Harrier 1 1 1   1 1 1 1       1   1   1 7 70% 2 8% 62% 12
Marsh Tit         1   1                   2 20% 4 15% 5% 6
Meadow Pipit 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Mediterranean Gull 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 14 54% 46% 30
Merlin 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 16 62% 38% 32
Mistle Thrush 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Moorhen 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Mute Swan 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 23 88% 12% 39
Nightingale                                 0 0% 2 8% -8% 2
Nightjar   1   1                         2 20% 0 0% 20% 2
Nuthatch 1   1 1     1   1 1   1         6 60% 2 8% 52% 9
Osprey     1 1 1 1       1       1     5 50% 2 8% 42% 8
Oystercatcher 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Pectoral Sandpiper                                 0 0% 2 8% -8% 2
Peregrine 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 22 85% 15% 38
Pheasant 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Pied Flycatcher       1     1 1 1 1       1     5 50% 1 4% 46% 7
Pied Wagtail 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Pied Wheatear                     1           0 0% 0 0% 0% 1
Pintail 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 24 92% 8% 40
Pochard     1       1 1 1     1 1 1     4 40% 12 46% -6% 19
Pomarine Skua                 1       1       1 10% 0 0% 10% 2
Raven 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 11 42% 58% 27
Red Kite 1 1 1 1 1 1 1 1 1 1   1 1 1 1   10 100% 0 0% 100% 14
Red-breasted Merganser   1       1   1     1     1     3 30% 6 23% 7% 11
Red-crested Pochard                 1 1       1     2 20% 0 0% 20% 3
Red-legged Partridge 1 1 1     1 1   1   1 1       1 6 60% 3 12% 48% 12
Redshank 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Redstart 1 1 1 1 1 1 1 1 1 1 1 1   1 1 1 10 100% 26 100% 0% 41
Redwing 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Reed Bunting 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Reed Warbler 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 17+ 65% 35% 33
Richard's Pipit                       1         0 0% 1 4% -4% 2
Ring Ouzel 1     1 1 1 1   1 1     1   1   7 70% 2 8% 62% 11
Ring-billed Gull                                 0 0% 1 4% -4% 1
Ringed Plover 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Ring-necked Duck                                 0 0% 1 4% -4% 1
Ring-necked Parakeet       1               1   1     1 10% 0 0% 10% 3
Robin 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Rock Pipit 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 16+ 62% 38% 32
Rook 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 20+ 77% 23% 36
Rose-coloured Starling 1                               1 10% 0 0% 10% 1
Ruddy Duck                                 0 0% 2 8% -8% 2
Ruddy Shelduck                   1   1         1 10% 0 0% 10% 2
Ruff     1 1 1 1         1   1   1 1 4 40% 21 81% -41% 29
Sabine's Gull                                 0 0% 2 8% -8% 2
Sand Martin 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Sanderling 1 1 1 1 1 1 1 1 1   1 1 1 1 1 1 9 90% c20 77% 13% 35
Sandwich Tern 1 1 1 1 1 1 1   1 1     1     1 9 90% 2 8% 82% 13
Sedge Warbler 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 15+ 58% 42% 31
Semi-palmated Sandpiper                                 0 0% 1 4% -4% 1
Shag           1         1     1     1 10% 0 0% 10% 3
Shelduck 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Shore Lark                       1         0 0% 0 0% 0% 1
Short-eared Owl 1 1 1 1 1 1 1 1   1 1   1 1 1   9 90% 15+ 58% 32% 28
Shoveler 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 20+ 77% 23% 36
Siskin 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 7+ 27% 73% 23
Skylark 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Slavonian Grebe                                 0 0% 1 4% -4% 1
Snipe 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Snow Bunting         1     1                 2 20% 4 15% 5% 6
Song Thrush 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Sparrowhawk 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Spoonbill       1 1           1 1 1 1   1 2 20% 0 0% 20% 7
Spotted Flycatcher 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 7+ 27% 73% 23
Spotted Redshank         1   1   1     1 1 1 1 1 3 30% 20+ 77% -47% 28
Starling 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Stock Dove 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Stone Curlew                 1               1 10% 0 0% 10% 1
Stonechat 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 20+ 77% 23% 26
Storm Petrel           1                     1 10% 2 8% 2% 3
Swallow 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Swift 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Tawny Owl 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 0 0% 100% 16
Teal 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Temminck's Stint                                 0 0% 1 4% -4% 1
Tree Pipit 1 1 1 1 1 1 1 1 1 1 1 1   1 1 1 10 100% c20 77% 23% 35
Tree Sparrow                     1   1       0 0% 19+ 78% -78% 21
Treecreeper 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 9 35% 65% 25
Tufted Duck 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 24 92% 8% 40
Turnstone 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Turtle Dove                 1 1           1 2 20% 3 12% 8% 6
Twite                   1 1           1 10% 2 8% 2% 4
Water Pipit     1 1 1 1     1 1   1 1       6 60% 3 12% 48% 11
Water Rail 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 11 42% 58% 27
Waxwing                   1   1         1 10% 0 0% 10% 2
Wheatear 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Whimbrel 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Whinchat 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 20+ 77% 23% 36
Whiskered Tern           1                     1 10% 0 0% 10% 1
White Stork 1                               1 10% 0 0% 10% 1
White-fronted Goose     1                 1       1 1 10% 17 65% -55% 20
Whitethroat 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Whooper Swan   1     1             1         2 20% 2 8% 12% 5
Wigeon 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Willow Warbler 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Wood Sandpiper             1           1       1 10% 3 12% -2% 5
Wood Warbler 1   1   1 1   1             1   5 50% 3 12% 38% 9
Woodcock     1 1   1         1 1 1       3 30% 3 12% 18% 9
Woodpigeon 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Wren 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Wryneck   1                             1 10% 0 0% 10% 1
Yellow Wagtail 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Yellow-browed Warbler           1       1             2 20% 0 0% 20% 2
Yellowhammer 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 100% 26 100% 0% 42
Yellow-legged Gull 1 1 1 1 1 1 1   1 1 1   1 1   1 9 90% 15 58% 32% 28
Total Species recorded in year 159 149 156 152 158 151 153 140 152 150 143 151 142 149 136 142
2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 Years seen in last 10 years % years seen in last 10 Years seen  1979-2005* % years seen 1979-2005 Difference in % Years seen since 1979
 
  No. in last 10 years
Very Rare - not seen in last 10 years, but seen since 1979*; or only seen once ever. 6 4 2 1 1 1 0 1 1 0 2 2 0 2 0 0 14
Very Rare - Seen one or two years in last 10 years (and more than once ever). 2 4 3 3 6 3 3 1 4 6 4 7 5 4 2 5 21
Rare - seen less than half years (3 to 4 times in last 10 years) 8 7 7 5 10 6 7 4 6 3 4 5 4 8 5 5 20
Total of Rare or Very Rare 16 15 12 9 17 10 10 6 11 9 10 14 9 14 7 10 55
Uncommon - seen at least half years (missed 2 to 5 years in 10) 19 15 25 24 22 22 26 16 23 23 18 19 17 16 11 17 25
Annual/Almost Annual - missed  max. one year in last 10  124 119 119 119 119 119 117 118 118 118 115 118 116 119 118 115 125
159 149 156 152 158 151 153 140 152 150 143 151 142 149 136 142 205 Species recorded in last 10 years
* The historic records (1979 – 2005) are with reference to ’The Journal of the Bristol Ornithological
 Club, Number 28, 2006; The Birds of Oldbury Power Station Silt Lagoons’ by AJ Middleton, DH Payne, JDR Vernon.
(Note that where the above publication does not specify all records for a species I have estimated the number of years seen from the text in the publication.)
The following Annual species are the least commonly seen (10 or less times per year on average, over last 10 years):
Arctic Skua
Arctic Tern
Avocet
Brambling
Common Tern
Cuckoo
Curlew Sandpiper
Garden Warbler
Golden Plover
Grasshopper Warbler
Green Sandpiper
Greenshank
Greylag Goose
Hobby
Jack Snipe
Kingfisher
Kittiwake
Knot
Mediterranean Gull
Merlin
Pintail
Red Kite
Redstart
Sanderling
Sandwich Tern
Short-eared Owl
Spotted Flycatcher
Tawny Owl
Tree Pipit
Treecreeper
Whinchat
Yellowhammer
Yellow-legged Gull