Table 1.
Summary of recorder effort (total records received and mean number of records per species) of UK mapping schemes for birds, plants and 39 groups of terrestrial or freshwater invertebrate.
| group | total records | records per species |
|---|---|---|
| bird | 1 252 734 | 6023 |
| plant | 9 100 000 | 5971 |
| butterfly (2001) | 1 857 400 | 26 534 |
| butterfly (1984) | 281 424 | 4020 |
| spider | 451 975 | 1773 |
| macro-moth | 378 549 | 490 |
| hoverfly | 374 784 | 1409 |
| slug, snail | 201 240 | 887 |
| ground-beetle | 141 700 | 400 |
| dragonfly | 109 117 | 1881 |
| grasshopper | 46 346 | 786 |
| milli-/centipede | 34 330 | 350 |
| soldier beetle | 30 412 | 422 |
| woodlice | 27 054 | 731 |
| brachycera fly | 20 980 | 141 |
| lacewing | 18 508 | 226 |
| bumblebee | 18 505 | 685 |
| longhorn beetle | 12 867 | 195 |
| harvestmen | 11 834 | 473 |
| atomariine beetle | 10 814 | 226 |
| water-flea | 9559 | 111 |
| ladybird | 9340 | 212 |
| rove beetle | 8644 | 103 |
| sepsid fly | 6083 | 225 |
| burnet moth | 5520 | 131 |
| picture-winged fly | 4921 | 76 |
| leech | 4414 | 276 |
| crayfish | 3896 | 649 |
| muscid fly | 2259 | 282 |
| bee, wasp, ant | 2054 | 93 |
| flea | 1939 | 52 |
| cranefly | 1894 | 271 |
| midge | 1463 | 105 |
| other beetles | 1030 | 103 |
| ciid beetles | 736 | 147 |
| well/land shrimp | 582 | 83 |
| water-slater | 582 | 194 |
| dolly/emphid fly | 582 | 29 |
| flatworm | 496 | 50 |
| parasitic wasps | 431 | 144 |
| tick (I. ricinus) | 249 | 249 |
| fairy shrimp | 163 | 83 |