Totals of individuals counted in Channel Isles



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 (less 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
Total No squares surveyed 1 1 7 6 7 7 7 7 7 7 11 13 19 16
Greylag Goose . . . . . . . . . . 1 . 1 .
Brent Goose . . . . . . . . 1 . . 37 . .
Mandarin . . . . . . . . . . . 1 . .
Mallard . . 69 60 38 84 69 65 39 28 42 98 50 96
Feral/hybrid mallard type . . . . . . . . . . . . 10 .
Tufted Duck . . 2 4 3 3 1 4 . 2 . 5 . .
Red-legged Partridge . . . . . . . . . 1 2 1 2 1
Grey Partridge 2 2 2 . . . 2 2 . . 2 . . .
Pheasant . . 11 14 11 16 33 34 43 39 62 99 128 147
Fulmar . . . . . . . . . . 1 2 36 2
Gannet . 15 33 . . 27 2 17 5 1 6 3 16 6
Cormorant . . . . . . . . 1 . 2 1 . 2
Shag . 1 1 1 . . 1 11 . . 4 3 9 15
Little Egret . . . . . . . . . . 24 12 21 .
Grey Heron . . 1 . 2 1 . 1 2 1 4 5 4 2
Marsh Harrier . . . . . . . . . . 1 1 3 3
Sparrowhawk . . 2 1 2 2 1 1 2 . 1 1 4 2
Buzzard . . . . 1 . . . . . 1 . 2 1
Kestrel 1 . 7 2 5 5 4 7 3 4 3 6 15 15
Hobby . . . . . . . . . . 1 . . .
Peregrine . . . . . . . . . . . 1 5 4
Moorhen . . 7 5 4 7 8 9 7 5 4 3 4 9
Coot . . . . . . . . . 2 2 11 4 6
Oystercatcher 21 29 25 14 10 5 9 11 9 4 29 56 39 107
Ringed Plover 1 . . . . . . . . . . . 2 .
Sanderling . . . . . . . . . . 2 . . .
Bar-tailed Godwit . 1 . . . . . 2 . . 2 . . 3
Whimbrel . 9 1 2 . . 3 1 . . 1 . 1 1
Curlew 4 3 13 1 . . 3 . . . 5 . 5 1
Turnstone . 1 . . . . . . . . . . . .
Black-headed Gull . 18 2 . . . 3 . . . 16 . 52 4
Lesser Black-backed Gull . . 2 . 4 1 . 5 3 4 3 5 24 32
Herring Gull 8 10 107 116 131 119 136 92 115 116 284 397 490 479
Great Black-backed Gull 6 6 15 12 8 17 10 12 9 12 20 35 30 28
Sandwich Tern . . . . . . . . . . . . 1 .
Common Tern 28 3 . . . 6 1 8 . 6 10 4 . .
Razorbill . . 1 . . . . . . . . . . .
Puffin . . . . . . . . . . . . 1 .
Feral Pigeon . 1 68 69 75 28 23 10 15 48 208 63 227 121
Stock Dove . . 10 . 9 23 20 14 33 28 38 46 25 44
Woodpigeon 4 3 137 123 130 186 173 140 175 101 182 247 338 340
Collared Dove . . 35 40 73 50 41 34 51 69 62 101 133 120
Turtle Dove . . 5 7 4 4 5 1 12 . 9 3 1 1
Cuckoo 3 1 1 1 1 . 2 3 1 . 1 . 1 .
Swift 25 . 36 8 12 11 21 5 10 8 15 26 29 24
Great Spotted Woodpecker . . 3 2 . 6 5 4 4 2 4 13 11 11
Skylark . 1 1 2 1 1 2 1 . . . 3 3 2
Sand Martin . . . . 1 1 . . . . . . . .
Swallow 14 4 49 46 56 52 67 44 69 77 158 124 185 126
House Martin 2 . 51 16 45 96 84 38 62 38 40 70 35 15
Meadow Pipit 12 9 6 1 4 10 3 9 6 4 23 9 83 10
Rock Pipit . . . . 2 . . . . . . . . 2
Yellow Wagtail . . . . . 1 . . . . . . . .
Grey Wagtail . . . . . . . . 2 . . . . .
Pied Wagtail . . . 1 . . . 1 . 3 2 6 . 2
Wren 13 9 136 113 153 178 172 148 184 165 174 221 320 245
Dunnock 2 3 60 39 45 56 35 37 26 31 40 46 81 72
Robin . 1 64 51 56 49 66 59 52 60 77 86 113 94
Redstart . 1 . 1 . . . . . . . . . .
Whinchat . . . . . 1 . . . . . . . .
Stonechat 2 3 . . . 1 . . 3 2 2 1 5 1
Wheatear 1 4 . 3 1 2 1 9 2 . . 1 4 2
Blackbird 4 8 122 83 100 95 85 73 94 63 99 145 240 201
Song Thrush . . 34 25 27 24 21 15 19 9 17 15 25 29
Mistle Thrush . . 10 1 6 . 2 2 1 4 . 1 1 2
Cettis Warbler . . . . . . . . . . . . . 1
Fan-tailed Warbler . . . . . . . . . . . . 3 .
Sedge Warbler . . . . 1 . . . . . . . 2 .
Reed Warbler . . 1 1 . . . . . . . . . 3
Blackcap 1 1 8 9 5 10 9 23 23 20 22 26 34 26
Garden Warbler . . . . . 1 . 1 . . 1 1 2 1
Lesser Whitethroat . . . . . . . . . . . . . 1
Whitethroat 2 2 5 4 2 5 2 2 3 3 5 5 51 13
Dartford Warbler . . . . . . . . . . . . 8 15
Chiffchaff 1 9 47 30 45 49 42 45 40 38 44 42 66 79
Willow Warbler . . 3 3 . 4 1 5 2 . 1 1 6 9
Goldcrest . . 10 5 3 14 12 12 13 8 13 10 6 10
Spotted Flycatcher . . 2 1 2 4 3 1 . . . . . .
Pied Flycatcher . . . . . . . . . . . . 1 .
Long-tailed Tit . . 6 1 1 7 4 3 18 17 7 16 22 10
Coal Tit . . . . . . . . 9 . 2 . . .
Blue Tit . . 45 48 42 56 42 71 50 50 73 72 92 86
Great Tit 3 2 45 52 38 62 35 52 57 70 78 150 167 150
Short-toed Treecreeper . . 5 6 2 5 4 3 6 2 6 5 7 .
Jay . . 4 3 3 4 1 2 5 4 9 14 12 13
Magpie . . 70 45 58 76 58 75 58 62 93 77 127 156
Jackdaw . . . . . . . . . . 1 . 34 9
Carrion Crow 4 4 69 50 60 58 44 89 74 75 86 146 220 245
Raven . . . . . . . . 1 1 . . 3 .
Starling 11 70 189 117 84 108 57 95 116 74 202 179 222 184
House Sparrow 3 . 235 243 161 164 133 146 137 154 342 378 380 363
Chaffinch 1 . 35 27 19 28 34 33 35 41 42 79 123 122
Greenfinch 1 1 58 40 39 60 38 49 68 70 112 180 208 171
Goldfinch . 1 44 48 28 44 18 27 23 25 52 55 67 46
Linnet 12 14 45 38 44 20 36 19 7 18 25 54 61 36
Bullfinch . . 3 . . 3 3 1 . 2 . 2 4 1
Yellowhammer . . 4 2 2 1 1 1 2 1 1 . . .
Reeves Pheasant . . . . . . . . . . . . 4 .
Helmeted Guineafowl . . . . . . . . . . . 6 2 .
Total number of Species 29 34 58 53 52 56 56 59 54 51 68 64 75 68

 


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