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Overview
of Invertebrate Animal Data
NatureServe Explorer provides comprehensive conservation status
and taxonomic information for invertebrate animal
species native to the United States and Canada in
the taxonomic groups noted below with an asterisk
(*). Invertebrate records in NatureServe Explorer
represent those species groups for which there is
sufficient information known to reasonably categorize
their status and distribution. Other invertebrate
species not in these groups that may need conservation
attention are also included. These records collectively
represent less than 5% of known described U.S. and
Canadian invertebrates. See Classification
of Vertebrates and Invertebrates for the source
of invertebrate names used in NatureServe Explorer.
Distribution information is complete for asterisked (*) groups, except sphinx and royal moths, stoneflies, and dragonflies, for which distribution information is only provided for those species globally at risk (i.e., with global conservation status ranks of GX to G3). All invertebrate species recorded in NatureServe Explorer have been classified according to major references or recent literature, and most have been assigned a global conservation status rank. National status under the U.S. Endangered Species Act and the Committee on the Status of Endangered Wildlife in Canada are provided where applicable. This information is continually reviewed and updated in the NatureServe Central Databases in order to reflect the latest taxonomic treatments, ongoing inventory efforts, and new status assessments. NatureServe Explorer is updated periodically from the NatureServe Central Databases, and new invertebrate groups are regularly added to the databases.
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Invertebrate Records in NatureServe Explorer (Native and Exotic)
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Known
U.S.
Distribution |
Known
Canadian Distribution |
Total Species and Subspecies |
| Species |
Subspecies |
Species |
Subspecies |
| All Invertebrates | 15,073 | 1,100 | 9,995 | 363 | 22,053 |
| Corals and other Cnidarians | 25 | 0 | 0 | 0 | 26 |
| Freshwater Mussels* | 306 | 30 | 56 | 6 | 340 |
| Freshwater Snails* | 783 | 17 | 101 | 19 | 837 |
| Terrestrial Snails* | 1,948 | 129 | 216 | 4 | 2,110 |
| Worms, Leeches, and Other Annelids | 41 | 0 | 3 | 0 | 45 |
| Crayfishes* | 352 | 26 | 11 | 2 | 381 |
| Amphipods | 219 | 2 | 8 | 0 | 226 |
| Isopods | 115 | 9 | 1 | 0 | 127 |
| Fairy, Clam, and Tadpole Shrimps* | 62 | 0 | 21 | 0 | 63 |
| Other Crustaceans | 143 | 5 | 13 | 0 | 160 |
| Butterflies and Skippers* | 622 | 515 | 269 | 250 | 1,408 |
| Giant Silkworm and Royal Moths* | 49 | 11 | 19 | 2 | 83 |
| Sphinx Moths* | 77 | 0 | 34 | 0 | 125 |
| Notodontid Moths* | 86 | 1 | 56 | 1 | 144 |
| Underwing Moths* | 106 | 13 | 57 | 1 | 119 |
| Papaipema Moths* | 52 | 0 | 31 | 0 | 53 |
| Tiger Moths* | 113 | 2 | 70 | 1 | 133 |
| Other Moths | 1,286 | 21 | 2,209 | 7 | 2,800 |
| Tiger Beetles* | 106 | 158 | 32 | 38 | 272 |
| Other Beetles | 2,991 | 75 | 3,902 | 3 | 5,268 |
| Ants, Wasps, and Bees | 173 | 6 | 153 | 0 | 333 |
| Caddisflies | 1,410 | 5 | 632 | 4 | 1,444 |
| Stoneflies* | 613 | 1 | 171 | 0 | 653 |
| Grasshoppers* | 496 | 13 | 65 | 8 | 669 |
| Mayflies* | 541 | 3 | 272 | 2 | 584 |
| Dragonflies and Damselflies* | 474 | 24 | 210 | 6 | 499 |
| Other Insects | 630 | 10 | 787 | 7 | 1,358 |
| Millipedes and Centipedes | 232 | 17 | 51 | 0 | 282 |
| Diplurans, Springtails and Proturans | 170 | 3 | 0 | 0 | 173 |
| Spiders and Other Chelicerates | 672 | 3 | 464 | 1 | 1,066 |
| Flatworms | 38 | 0 | 1 | 0 | 41 |
| Other Invertebrates | 43 | 0 | 28 | 0 | 58 |
"*" Denotes groups for which native species are comprehensively covered in NatureServe Explorer. Note: These records include 154 invertebrates known to be exotic in the United States or Canada. |
Invertebrate Animals by NatureServe Conservation Status
(Native Only) |
| Invertebrate Species Groups |
Potentially Extinct (GX, GH) |
| At Risk (G1, G2, G3) |
Apparently Secure (G4, G5) |
Unrankable (GU) |
Not Yet Ranked (GNR) |
| Freshwater Mussels* | 36 | 174 | 89 | 4 | 4 |
| Freshwater Snails* | 86 | 499 | 158 | 4 | 14 |
| Terrestrial Snails* | 75 | 854 | 280 | 6 | 656 |
| Crayfishes* | 3 | 180 | 167 | 1 | 1 |
| Fairy, Clam, and Tadpole Shrimps* | 4 | 16 | 43 | 0 | 0 |
| Butterflies and Skippers* | 1 | 129 | 484 | 3 | 4 |
| Giant Silkworm and Royal Moths* | 0 | 17 | 33 | 1 | 0 |
| Sphinx Moths* | 0 | 14 | 62 | 2 | 0 |
| Notodontid Moths* | 4 | 38 | 61 | 2 | 0 |
| Underwing Moths* | 1 | 12 | 91 | 2 | 0 |
| Papaipema Moths* | 3 | 17 | 33 | 0 | 0 |
| Tiger Moths* | 2 | 39 | 81 | 2 | 0 |
| Tiger Beetles* | 0 | 28 | 78 | 0 | 0 |
| Stoneflies* | 16 | 271 | 330 | 0 | 3 |
| Grasshoppers* | 20 | 271 | 156 | 54 | 3 |
| Mayflies* | 14 | 186 | 351 | 0 | 8 |
| Dragonflies and Damselflies* | 3 | 80 | 385 | 1 | 5 |
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