The WeBS Core Counts scheme is the principal scheme of The Wetland Bird Survey. Counts are made annually at around 2,000 wetland sites of all habitats; estuaries and large still waters predominate.
Monthly coordinated counts are made mostly by volunteers, principally from September to March, with fewer observations during summer months. During 2008/09, WeBS counters covered 3,300 count sectors at around 2,000 count sites, during the crucial ‘winter’ period of September to March. At least 1,500 were counted in any one of these months and almost 1,100 were covered continually throughout this period. The success and growth of these count schemes accurately reflects the enthusiasm and dedication of the several thousands of volunteer ornithologists who participate. It is largely due to their efforts that waterbird monitoring in the UK is held in such international high regard.
This is the wetland bird count for Rutland Water Nature Reserve from April to September 2011. Many thanks to everyone who helped count the birds.
| Species | April | May | June | July | August | Sept | Total |
| Mute Swan | 208 | 256 | 326 | 475 | 464 | 542 | 2271 |
| Bewick’s Swan [Tundra] | 0 | 0 | 0 | 0 | 0 | 0 | |
| Whooper Swan | 0 | 0 | 0 | 0 | 0 | 0 | |
| Greylag Goose | 172 | 179 | 570 | 535 | 756 | 833 | 3045 |
| Canada Goose | 88 | 98 | 674 | 1051 | 1356 | 767 | 4034 |
| Barnacle Goose | 1 | 0 | 1 | 1 | 0 | 14 | 17 |
| Pink-footed Goose | 1 | 0 | 0 | 0 | 0 | 1 | |
| Egyptian Goose | 40 | 31 | 56 | 65 | 90 | 122 | 404 |
| (Common) Shelduck | 53 | 62 | 40 | 38 | 11 | 3 | 207 |
| Mandarin Duck | 0 | 0 | 2 | 2 | 1 | 3 | 8 |
| (Eurasian) Wigeon | 14 | 5 | 5 | 16 | 6 | 2187 | 2233 |
| Gadwall | 150 | 168 | 203 | 213 | 705 | 1537 | 2976 |
| (Eurasian) Teal | 100 | 2 | 11 | 79 | 393 | 720 | 1305 |
| Mallard | 412 | 543 | 851 | 1057 | 1577 | 1808 | 6248 |
| (Northern) Pintail | 0 | 0 | 0 | 0 | 0 | 51 | 51 |
| Garganey | 0 | 1 | 0 | 0 | 2 | 2 | 5 |
| (Northern) Shoveler | 18 | 17 | 16 | 12 | 146 | 402 | 611 |
| Red-crested Pochard | 0 | 0 | 0 | 12 | 1 | 13 | |
| (Common) Pochard | 0 | 1 | 5 | 0 | 34 | 50 | 90 |
| Tufted Duck | 389 | 216 | 250 | 2215 | 2971 | 7692 | 13733 |
| (Greater) Scaup | 0 | 0 | 0 | 0 | 0 | 0 | |
| Common Scoter | 1 | 0 | 0 | 0 | 0 | 1 | |
| (Common) Goldeneye | 21 | 1 | 0 | 1 | 1 | 2 | 26 |
| Smew | 0 | 0 | 0 | 0 | 0 | 0 | |
| Red-breasted Merganser | 0 | 0 | 0 | 0 | 0 | 0 | |
| Goosander | 0 | 0 | 0 | 0 | 0 | 0 | |
| Ruddy Duck | 0 | 0 | 0 | 0 | 0 | 0 | |
| Lesser Scaup | 0 | 0 | 0 | 0 | 0 | 0 | |
| Ruddy Shelduck | 0 | 0 | 0 | 2 | 0 | 2 | |
| Red Throated Diver [Loon] | 0 | 0 | 0 | 0 | 0 | 0 | |
| Black Throated Diver [Loon] | 0 | 0 | 0 | 0 | 0 | 0 | |
| Great Northern Diver [Loon] | 0 | 0 | 0 | 0 | 0 | 0 | |
| Little Grebe | 8 | 4 | 4 | 19 | 41 | 106 | 182 |
| Great Crested Grebe | 84 | 105 | 122 | 240 | 220 | 462 | 1233 |
| Red-necked Grebe | 0 | 0 | 0 | 0 | 0 | 0 | |
| Slavonian Grebe [Horned] | 0 | 0 | 0 | 0 | 0 | 0 | |
| Black-necked Grebe [Eared] | 0 | 0 | 0 | 0 | 0 | 0 | |
| (Great) Cormorant | 200 | 218 | 252 | 181 | 227 | 266 | 1344 |
| (Great) Bittern | 0 | 0 | 0 | 0 | 0 | 0 | |
| Little Egret | 4 | 8 | 11 | 51 | 40 | 55 | 169 |
| Grey Heron | 12 | 6 | 11 | 13 | 16 | 29 | 87 |
| Water Rail | 2 | 0 | 8 | 6 | 0 | 12 | 28 |
| (Common) Moorhen | 22 | 48 | 56 | 62 | 68 | 95 | 351 |
| (Eurasian) Coot | 237 | 277 | 456 | 1250 | 1870 | 4186 | 8276 |
| Shag | 0 | 0 | 0 | 0 | 0 | 0 | |
| (Eurasian) Oystercatcher | 20 | 19 | 22 | 12 | 0 | 73 | |
| (Pied) Avocet | 2 | 6 | 9 | 0 | 0 | 17 | |
| Little Ringed Plover | 21 | 24 | 28 | 26 | 13 | 6 | 118 |
| Ringed Plover (Common) | 0 | 27 | 20 | 0 | 13 | 13 | 73 |
| (European) Golden Plover | 0 | 0 | 0 | 0 | 0 | 3 | 3 |
| Grey Plover | 0 | 0 | 0 | 0 | 0 | 0 | |
| (Northern) Lapwing | 35 | 36 | 206 | 872 | 483 | 1079 | 2711 |
| (Red) Knot | 0 | 0 | 0 | 1 | 0 | 1 | |
| Sanderling | 0 | 4 | 0 | 0 | 1 | 5 | |
| Little Stint | 0 | 0 | 0 | 0 | 0 | 0 | |
| Pectoral Sandpiper | 0 | 0 | 0 | 0 | 0 | 0 | |
| Curlew Sandpiper | 0 | 0 | 0 | 0 | 0 | 0 | |
| Dunlin | 5 | 14 | 8 | 7 | 5 | 4 | 43 |
| Ruff | 0 | 0 | 0 | 4 | 17 | 7 | 28 |
| Jack Snipe | 0 | 0 | 0 | 0 | 0 | 0 | |
| Common Snipe | 1 | 0 | 0 | 0 | 1 | 12 | 14 |
| (Eurasian) Woodcock | 0 | 0 | 0 | 0 | 0 | 0 | |
| Black-tailed Godwit | 2 | 0 | 0 | 1 | 1 | 4 | 8 |
| Bar-tailed Godwit | 0 | 0 | 0 | 0 | 0 | 0 | |
| Whimbrel | 0 | 0 | 0 | 1 | 0 | 1 | |
| (Eurasian) Curlew | 2 | 0 | 3 | 6 | 4 | 4 | 19 |
| Spotted Redshank | 0 | 0 | 0 | 0 | 0 | 0 | |
| (Common) Redshank | 2 | 3 | 24 | 9 | 3 | 1 | 42 |
| (Common) Greenshank | 1 | 1 | 0 | 9 | 20 | 3 | 34 |
| Green Sandpiper | 1 | 0 | 2 | 22 | 21 | 12 | 58 |
| Lesser Yellow legs | 0 | 0 | 0 | 0 | 0 | 0 | |
| Wood Sandpiper | 0 | 0 | 0 | 0 | 1 | 1 | |
| Common Sandpiper | 0 | 1 | 0 | 18 | 4 | 2 | 25 |
| Spotted Sandpiper | 0 | 0 | 0 | 0 | 0 | 0 | |
| Ruddy Turnstone | 0 | 1 | 0 | 0 | 3 | 4 | |
| Red-necked Phalarope | 0 | 0 | 0 | 0 | 0 | 0 | |
| Grey Phalarope | 0 | 0 | 0 | 0 | 0 | 0 | |
| Arctic Skua | 0 | 0 | 0 | 0 | 0 | 0 | |
| Little Gull | 1 | 1 | 0 | 0 | 0 | 2 | |
| Sabie’s Gull | 0 | 0 | 0 | 0 | 0 | 0 | |
| Black-headed Gull | 270 | 220 | 110 | 37 | 255 | 892 | |
| Common (Mew) Gull | 16 | 0 | 0 | 0 | 0 | 16 | |
| Lesser Black-backed Gull | 1 | 1 | 1 | 30 | 14 | 47 | |
| Yellow-legged Gull | 0 | 0 | 6 | 7 | 0 | 13 | |
| Caspian Gull | 0 | 0 | 0 | 0 | 0 | 0 | |
| Herring Gull | 0 | 0 | 0 | 0 | 0 | 0 | |
| Glaucous Gull | 0 | 0 | 0 | 0 | 0 | 0 | |
| Great Black-backed Gull | 16 | 11 | 0 | 20 | 4 | 51 | |
| (Black-legged) Kittiwake | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bridled Tern | 0 | 0 | 0 | 0 | 0 | 0 | |
| Little Tern | 0 | 0 | 0 | 0 | 0 | 0 | |
| Black Tern | 0 | 0 | 0 | 0 | 0 | 0 | |
| White-winged Black Tern | 0 | 0 | 0 | 0 | 0 | 0 | |
| Common Tern | 33 | 100 | 73 | 92 | 65 | 8 | 371 |
| Arctic Tern | 0 | 0 | 0 | 0 | 0 | 2 | 2 |
| Mediterranean Gull | 0 | 0 | 0 | 0 | 0 | 0 | |
| Green Winged Teal | 0 | 0 | 5 | 0 | 0 | 5 | |
| Kingfisher | 0 | 1 | 2 | 0 | 2 | 2 | 7 |
| Sandwich Tern | 0 | 0 | 0 | 0 | 0 | 0 | |
| Grey Wagtail | 0 | 0 | 0 | 0 | 0 | 0 | |
| Canada x Barnacle | 2 | 0 | 0 | 0 | 0 | 2 | |
| Canada x Graylag | 0 | 0 | 0 | 0 | 1 | 1 | |
| Black Swan | 0 | 0 | 0 | 1 | 1 | 2 | |
| Long-tailed Duck | 0 | 0 | 0 | 0 | 0 | 0 | |
| Pochardxtufted duck | 0 | 0 | 0 | 0 | 0 | 0 | |
| Pink-footed Goose | 1 | 1 | 0 | 0 | 0 | 2 | |
| Australian/Shelduck | 0 | 0 | 0 | 0 | 0 | ||
| Spoonbill | 1 | 0 | 1 | ||||
| Total | 8771 | 11928 | 23108 | 53642 |