Number of 1km squares in which each species
was recorded in UK



These figures show the total number of squares in which a given species was recorded at least once in a particular year. They provide as useful indication of which species are widely distributed and which have more restricted distributions. For comparative purposes the data can be used to calculate the frequency of occurrence of each species by dividing the number of squares occupied 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 distributions 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 1569 1747 1920 2195 2311 2395 2301 638 2205 2326 2530 2889 3287 3604
Mute Swan 115 128 150 172 194 219 214 69 204 225 259 278 318 335
Whooper Swan . 3 . . 3 4 1 . 1 7 3 1 4 4
Pink-footed Goose 3 1 4 7 4 5 7 . 6 7 9 7 6 5
White-fronted Goose . . 1 1 . 1 1 . 2 . 1 1 1 1
Greylag Goose 50 64 75 85 99 102 109 20 120 156 152 194 249 292
Feral/hybrid Goose . . . 1 2 2 6 2 4 1 16 15 20 18
Snow Goose 1 . 1 1 2 1 3 . 1 . . . . 1
Canada Goose 185 228 261 298 324 367 400 97 407 413 487 532 635 693
Barnacle Goose 2 4 5 6 5 4 2 . 2 4 9 4 9 11
Brent Goose 1 1 5 1 1 1 1 . 4 2 3 3 7 6
Black Brant . . . . . . . . . . . . 1 .
Red-breasted Goose . . . . . . 1 . . . 1 . . .
Egyptian Goose 2 2 . 4 7 6 8 1 7 10 15 20 19 26
Ruddy Shelduck . . 1 . 2 . 1 . . 1 1 . 2 2
Shelduck 85 96 109 127 138 128 132 31 117 129 137 153 191 187
Mandarin 5 8 3 10 8 18 17 6 20 23 25 17 39 35
Wigeon 5 7 3 10 4 2 9 1 5 7 13 6 8 13
Gadwall 17 16 18 19 32 29 35 17 23 29 38 42 44 56
Teal 13 25 27 19 20 19 22 4 19 37 31 30 38 28
Mallard 663 751 850 949 1038 1151 1116 275 1077 1119 1241 1429 1630 1737
Feral/hybrid mallard type . . . 2 . 3 3 2 8 10 21 22 29 39
Pintail . 1 3 2 . 2 1 . . 1 . . 2 3
Garganey . . 1 . 1 3 3 . . 3 . 2 3 .
Shoveler 9 11 9 9 11 15 16 3 9 14 18 19 19 17
Red-crested Pochard . 1 . 1 1 . 1 . 3 3 1 . 1 .
Pochard 11 10 11 18 13 12 16 6 9 15 19 25 19 24
Ring-necked Duck . . . . 1 1 . . . . . . . .
Tufted Duck 97 94 115 128 135 149 154 50 128 121 135 162 185 184
Scaup . . 1 1 1 . 2 . . 2 . . 1 .
Eider 7 9 6 8 6 6 10 3 10 6 10 12 17 20
Long-tailed Duck . . 1 . . 1 . . . . . . . .
Common Scoter 1 2 1 1 . . . . . . . 2 . 2
Goldeneye 5 7 2 2 3 2 7 2 6 4 3 5 7 8
Red-breasted Merganser 7 7 10 11 15 15 13 4 10 12 14 11 16 13
Goosander 20 31 32 32 46 31 33 3 32 41 36 36 53 41
Ruddy Duck 5 4 8 6 10 8 9 4 10 11 16 19 13 14
Red Grouse 83 92 103 118 128 113 97 18 91 98 113 112 117 145
Ptarmigan 2 1 3 2 2 3 2 . 2 1 . . 1 4
Black Grouse 5 13 9 14 9 10 9 1 8 4 10 7 16 18
Capercaillie . . . 1 . . . . . . . . 1 .
Red-legged Partridge 262 306 369 418 433 443 416 120 423 450 584 623 699 794
Grey Partridge 183 199 268 292 239 186 204 36 196 180 209 249 291 302
Quail 11 17 6 28 28 16 9 3 10 7 13 21 9 10
Pheasant 903 1014 1138 1318 1399 1483 1469 330 1416 1533 1706 1986 2292 2546
Golden Pheasant 1 4 4 . 1 . 3 . . 1 4 3 4 .
Lady Amhersts Pheasant . . . . . . . . 1 . . . . .
Red-throated Diver 13 11 14 17 14 12 13 6 13 13 12 15 14 10
Black-throated Diver 1 1 1 4 4 5 2 1 3 1 4 5 3 6
Great Northern Diver 1 . 1 1 1 3 2 . 1 1 1 3 4 2
Little Grebe 28 37 42 50 50 58 63 22 69 66 66 92 95 82
Great Crested Grebe 43 53 46 57 67 59 64 25 61 58 73 84 79 94
Black-necked Grebe . . . 2 . 2 1 1 1 1 1 1 1 1
Fulmar 18 19 17 21 24 20 21 3 27 16 25 27 32 22
Manx Shearwater . . 1 . 1 1 . . 1 1 . . . .
Gannet 4 8 5 5 7 8 3 3 9 6 15 14 19 17
Cormorant 81 114 115 132 164 190 210 67 206 207 270 284 331 345