Totals of individuals counted in Isle of Man



These figures are totals of the maximum counts recorded from each square in a given year. The maximum count is calculated for each species separately and is based on all birds seen and heard, including those in flight. These figures provide a useful indication of the relative abundance of different species, although they do not take account of differences in detectability between species. They do not provide measure of absolute abundance because BBS surveys do not detect all of the birds present in a particular square. For comparative purposes the data can be used to calculate the mean count per square by dividing the species totals in the table by the total number of squares surveyed. This measure has the advantage that it can be used to compare results based on different numbers of squares. Particular care should be taken in interpreting such results where only a few squares could be surveyed (fewer than 30-50 squares). While these figures may provide a general indication of major changes in abundance over time, they do not provide a statistically robust measure of such changes because they do not take account of the BBS sampling strategy or of temporal variation in the sample of squares surveyed. BBS trend analyses are available here

 
 

Species 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09
Total No squares surveyed 4 4 4 6 6 5 3 0 3 4 6 3 5 4 1 0
Mute Swan . . . . . 1 . . . . . . . . . .
Pink-footed Goose . . . . . . . . . . . 6 . . . .
Greylag Goose . . 2 2 . . 9 . 6 25 . . . . . .
Canada Goose . . . 8 . . . . . . . . . . . .
Shelduck . . . 1 7 . . . . . 2 3 8 2 . .
Mallard 2 6 7 11 7 4 11 . 4 4 11 10 22 23 5 .
Tufted Duck . . . . . . . . . . . . 2 1 . .
Eider . . . . . . . . . . 31 14 3 7 . .
Red-legged Partridge . . . . . . . . . . 2 . . . . .
Pheasant 9 12 6 14 17 23 14 . 8 16 32 11 22 23 4 .
Fulmar . . . 1 3 . . . . . 10 4 22 11 . .
Gannet . . . . 9 . . . . . 4 . 1 3 . .
Cormorant . . . . 8 . . . . . 13 6 8 16 . .
Shag . . . 10 2 . . . . . 4 . . . . .
Grey Heron 1 3 . 2 1 2 2 . 1 . 2 . 3 . . .
Hen Harrier . 1 1 . . . 1 . . 1 2 . 1 . . .
Sparrowhawk . . . 2 . . 2 . 1 2 . . . . 2 .
Kestrel . . 1 1 . . . . . . 3 1 1 . . .
Peregrine . . . 3 1 . . . . . 1 . 1 1 . .
Moorhen 2 . 1 1 2 1 1 . 3 . 3 1 2 5 2 .
Oystercatcher 3 3 2 11 9 3 1 . . . 6 8 2 1 . .
Ringed Plover . . . . . . . . . . 2 2 2 . . .
Lapwing . . . 6 . . . . . . . . . . . .
Sanderling . . . 1 . . . . . . . . . . . .
Curlew 11 10 8 19 11 7 8 . 6 23 12 . 8 3 . .
Common Sandpiper . . . . . . . . . . . 2 2 . . .
Lesser Black-backed Gull 1 . . . 1 . . . . . . . 2 . . .
Herring Gull 96 45 35 83 52 119 65 . 25 87 210 154 227 162 22 .
Great Black-backed Gull 1 1 4 8 14 2 3 . 1 . 3 9 5 4 . .
Guillemot . . . . . . . . . . 1 . 4 . . .
Razorbill . . . . 2 . . . . . . . . . . .
Black Guillemot . . . . . . . . . . . . 1 . . .
Feral Pigeon 5 4 9 5 8 1 5 . 5 6 1 . 1 . . .
Woodpigeon 21 22 36 51 30 33 38 . 20 25 43 34 30 33 12 .
Collared Dove 7 15 11 16 11 15 8 . 13 12 17 13 15 6 7 .
Barn Owl . . . . . . 1 . . . . . . . . .
Swift 4 3 13 . 1 3 . . 8 . 1 . . . . .
Skylark . 1 3 2 . . . . . . . . . . . .
Sand Martin . . . 9 . . . . 3 . . . . . . .
Swallow 20 12 18 76 43 52 16 . 23 43 123 24 31 14 6 .
House Martin 6 17 12 13 34 29 7 . 21 23 57 1 3 2 . .
Meadow Pipit 4 5 17 24 18 15 . . . 1 5 2 1 1 . .
Rock Pipit . . . 5 5 . . . . . 1 1 4 1 . .
Yellow Wagtail . . . 1 . . . . . . . . . . . .
Grey Wagtail 1 . . . . . . . . . . . 1 . . .
Pied Wagtail 4 3 8 12 21 9 1 . 5 4 10 10 8 2 1 .
Wren 55 59 47 59 69 84 51 . 59 64 75 44 69 61 23 .
Dunnock 13 14 10 15 13 9 6 . 7 9 12 7 10 13 2 .
Robin 23 38 24 33 36 48 35 . 28 24 46 19 27 29 14 .
Stonechat . . . 4 4 4 . . . 1 1 5 . . . .
Wheatear . 1 . 1 1 . . . . . . . . . . .
Blackbird 25 44 31 43 37 26 36 . 16 28 69 25 36 38 13 .
Fieldfare . . . . . . . . . . . . . 38 . .
Song Thrush 17 21 15 12 19 17 15 . 13 10 17 10 14 14 7 .
Mistle Thrush 3 5 7 8 6 6 11 . 6 6 14 6 12 11 12 .
Grasshopper Warbler . . . 1 . . . . . 2 . . . . . .
Sedge Warbler 4 2 5 3 1 . 2 . . 1 4 . 3 . . .
Blackcap 1 3 2 4 2 1 2 . 3 1 3 1 7 2 2 .
Lesser Whitethroat . . . . . . . . 1 . . . . . . .
Whitethroat 4 6 6 6 2 3 3 . 3 2 3 . 2 . 1 .
Chiffchaff 1 4 . 1 1 2 1 . . . 3 3 1 . . .
Willow Warbler 15 16 21 23 20 14 18 . 21 9 23 5 18 4 . .
Goldcrest 2 5 4 7 3 9 12 . 2 2 11 8 10 3 3 .
Spotted Flycatcher 2 . 1 . . . . . . 3 2 2 . . . .
Long-tailed Tit 6 4 . . . 4 6 . . . . 7 2 . 2 .
Blue Tit 13 28 26 23 19 21 17 . 19 14 24 17 13 15 10 .
Great Tit 16 19 4 15 19 17 12 . 18 18 18 17 12 15 6 .
Coal Tit 1 1 5 3 4 2 1 . 10 4 15 2 . 1 5 .
Treecreeper 2 2 1 . . . 2 . 2 . . 2 1 1 . .
Magpie 18 14 13 21 20 12 18 . 12 15 51 9 14 5 2 .
Chough 2 2 1 12 7 5 1 . . 4 20 15 25 16 . .
Jackdaw 97 77 119 204 106 80 33 . 42 52 52 47 88 44 41 .
Rook 43 21 8 65 149 85 95 . 46 88 51 95 101 34 2 .
Carrion Crow 2 . . 7 5 1 1 . 1 3 3 . 2 . 3 .
Hooded Crow 7 14 12 16 26 15 12 . 9 10 23 15 29 11 2 .
Raven 2 . 3 10 4 4 8 . 3 . 10 . 9 6 1 .
Starling 27 9 16 42 30 5 2 . 8 2 53 75 43 160 . .
House Sparrow 14 14 10 31 21 26 16 . 10 20 49 24 25 16 4 .
Tree Sparrow . . 1 2 6 . . . 1 . . . . . . .
Chaffinch 40 39 35 54 52 46 29 . 29 47 60 29 51 42 17 .
Greenfinch 11 24 33 37 21 26 16 . 19 35 39 14 19 8 5 .
Goldfinch 4 11 9 9 13 5 11 . 3 17 18 11 17 17 13 .
Siskin . . . 5 1 3 . . . . . . . . . .
Linnet 13 3 8 69 23 11 6 . 2 10 9 11 12 7 2 .
Lesser Redpoll . 2 4 6 . . 4 . 8 2 2 . 4 . . .
Reed Bunting . 2 . 1 3 1 2 . 1 2 3 . . . . .
Total number of Species 49 48 49 64 58 48 50 0 47 45 61 49 61 47 33 0

 


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