Rare Species by County: Norfolk
Last Updated on 3/1/2003
| Taxonomic Group | Scientific Name | Common Name | State Rank | Federal Rank | Most Recent Obs |
| Fish | Lampetra appendix | American Brook Lamprey | T | 1980 | |
| Fish | Notropis bifrenatus | Bridle Shiner | SC | 1999 | |
| Amphibian | Ambystoma laterale | Blue-Spotted Salamander | SC | 1995 | |
| Amphibian | Ambystoma opacum | Marbled Salamander | T | 1995 | |
| Amphibian | Hemidactylium scutatum | Four-Toed Salamander | SC | 1993 | |
| Amphibian | Scaphiopus holbrookii | Eastern Spadefoot | T | 1924 | |
| Reptile | Clemmys guttata | Spotted Turtle | SC | 2001 | |
| Reptile | Clemmys insculpta | Wood Turtle | SC | 1993 | |
| Reptile | Emydoidea blandingii | Blanding's Turtle | T | 1997 | |
| Reptile | Terrapene carolina | Eastern Box Turtle | SC | 2001 | |
| Bird | Accipiter striatus | Sharp-Shinned Hawk | SC | (PS) | 1905 |
| Bird | Ammodramus henslowii | Henslow's Sparrow | E | 1897 | |
| Bird | Botaurus lentiginosus | American Bittern | E | 1970 | |
| Bird | Circus cyaneus | Northern Harrier | T | 1986 | |
| Bird | Cistothorus platensis | Sedge Wren | E | 1893 | |
| Bird | Gavia immer | Common Loon | SC | 1922 | |
| Bird | Ixobrychus exilis | Least Bittern | E | 1992 | |
| Bird | Vermivora chrysoptera | Golden-Winged Warbler | E | 1952 | |
| Mussel | Ligumia nasuta | Eastern Pondmussel | SC | 2000 | |
| Mussel | Strophitus undulatus | Creeper | SC | 2000 | |
| Crustacean | Crangonyx aberrans | Mystic Valley Amphipod | SC | 1997 | |
| Dragonfly/Damselfly | Aeshna mutata | Spatterdock Darner | E | 1997 | |
| Dragonfly/Damselfly | Anax longipes | Comet Darner | SC | 1970 | |
| Dragonfly/Damselfly | Enallagma daeckii | Attenuated Bluet | SC | 2001 | |
| Dragonfly/Damselfly | Enallagma laterale | New England Bluet | SC | 1996 | |
| Dragonfly/Damselfly | Neurocordulia obsoleta | Umber Shadowdragon | SC | 1968 | |
| Dragonfly/Damselfly | Ophiogomphus aspersus | Brook Snaketail | SC | 1894 | |
| Dragonfly/Damselfly | Somatochlora linearis | Mocha Emerald | SC | 1989 | |
| Beetle | Cicindela duodecimguttata | Twelve-Spotted Tiger Beetle | SC | 1908 | |
| Beetle | Cicindela purpurea | Purple Tiger Beetle | SC | 1961 | |
| Beetle | Cicindela rufiventris hentzii | Hentz's Redbelly Tiger Beetle | T | 1991 | |
| Beetle | Desmocerus palliatus | Elderberry Long-Horned Beetle | SC | 1991 | |
| Butterfly/Moth | Callophrys hesseli | Hessel's Hairstreak | SC | 2001 | |
| Butterfly/Moth | Cingilia catenaria | Chain Dot Geometer | SC | ||
| Butterfly/Moth | Eacles imperialis | Imperial Moth | T | 1934 | |
| Butterfly/Moth | Erynnis persius persius | Persius Duskywing | E | 1942 | |
| Butterfly/Moth | Hemileuca maia | Barrens Buckmoth | SC | 1934 | |
| Butterfly/Moth | Metarranthis pilosaria | Coastal Swamp Metarranthis Moth | SC | 1994 | |
| Butterfly/Moth | Papaipema appassionata | Pitcher Plant Borer Moth | T | 1985 | |
| Butterfly/Moth | Satyrium favonius | Oak Hairstreak | SC | 1996 | |
| Butterfly/Moth | Spartiniphaga inops | Spartina Borer Moth | SC | ||
| Vascular Plant | Aristida purpurascens | Purple Needlegrass | T | 1908 | |
| Vascular Plant | Asclepias purpurascens | Purple Milkweed | E | 1945 | |
| Vascular Plant | Asclepias verticillata | Linear-Leaved Milkweed | T | 1909 | |
| Vascular Plant | Bolboschoenus fluviatilis | River Bulrush | SC | 2001 | |
| Vascular Plant | Carex glaucodea | Glaucescent Sedge | E | 1901 | |
| Vascular Plant | Carex oligosperma | Few-Fruited Sedge | E | 1920 | |
| Vascular Plant | Carex polymorpha | Variable Sedge | E | 1930 | |
| Vascular Plant | Carex recta | Saline Sedge | E | 1873 | |
| Vascular Plant | Claytonia virginica | Narrow-Leaved Spring Beauty | E | 1981 | |
| Vascular Plant | Conioselinum chinense | Hemlock Parsley | SC | 1892 | |
| Vascular Plant | Cyperus houghtonii | Houghton's Flatsedge | E | 1928 | |
| Vascular Plant | Eleocharis obtusa var ovata | Ovate Spike-Sedge | E | 1878 | |
| Vascular Plant | Elymus villosus | Hairy Wild Rye | E | 1889 | |
| Vascular Plant | Eriophorum gracile | Slender Cottongrass | T | 1892 | |
| Vascular Plant | Eupatorium aromaticum | Lesser Snakeroot | E | 1999 | |
| Vascular Plant | Galium boreale | Northern Bedstraw | E | 1881 | |
| Vascular Plant | Gentiana andrewsii | Andrews' Bottle Gentian | E | 1911 | |
| Vascular Plant | Goodyera repens | Dwarf Rattlesnake-Plantain | E | 1894 | |
| Vascular Plant | Houstonia longifolia var longifolia | Long-Leaved Bluet | E | 1919 | |
| Vascular Plant | Liatris borealis | New England Blazing Star | SC | 1915 | |
| Vascular Plant | Linum medium var texanum | Rigid Flax | T | 1908 | |
| Vascular Plant | Lygodium palmatum | Climbing Fern | SC | 1899 | |
| Vascular Plant | Magnolia virginiana | Sweetbay Magnolia | E | 1998 | |
| Vascular Plant | Myriophyllum alterniflorum | Alternate-Flowered Water-Milfoil | T | 1894 | |
| Vascular Plant | Ophioglossum pusillum | Adder's-Tongue Fern | T | 1919 | |
| Vascular Plant | Panicum philadelphicum | Philadelphia Panic-Grass | SC | 1986 | |
| Vascular Plant | Petasites frigidus var palmatus | Sweet Coltsfoot | E | 1897 | |
| Vascular Plant | Platanthera flava var herbiola | Pale Green Orchis | T | 1995 | |
| Vascular Plant | Potamogeton vaseyi | A Pondweed | E | 1880 | |
| Vascular Plant | Prenanthes serpentaria | Lion's Foot | E | 1946 | |
| Vascular Plant | Pycnanthemum clinopodioides | Basil Mountain-Mint | E | 1997 | |
| Vascular Plant | Ranunculus micranthus | Tiny-Flowered Buttercup | E | 1910 | |
| Vascular Plant | Rhododendron maximum | Great Laurel | T | 1998 | |
| Vascular Plant | Rotala ramosior | Toothcup | E | 1929 | |
| Vascular Plant | Rumex pallidus | Seabeach Dock | T | 1998 | |
| Vascular Plant | Rumex verticillatus | Swamp Dock | T | 1996 | |
| Vascular Plant | Sabatia kennedyana | Plymouth Gentian | SC | 1999 | |
| Vascular Plant | Scheuchzeria palustris | Pod-Grass | E | 1992 | |
| Vascular Plant | Scirpus longii | Long's Bulrush | T | 2002 | |
| Vascular Plant | Senna hebecarpa | Wild Senna | E | 1886 | |
| Vascular Plant | Sphenopholis nitida | Shining Wedgegrass | T | 1923 | |
| Vascular Plant | Sphenopholis pensylvanica | Swamp Oats | T | 1887 | |
| Vascular Plant | Spiranthes vernalis | Grass-Leaved Ladies'-Tresses | T | 1985 | |
| Vascular Plant | Symphyotrichum tradescantii | Tradescant's Aster | T | 1932 | |
| Vascular Plant | Triosteum perfoliatum | Broad Tinker's-Weed | E | 1905 | |
| Vascular Plant | Trisetum triflorum ssp molle | Spiked False Oats | E | 1889 | |
| Vascular Plant | Verbena simplex | Narrow-Leaved Vervain | E | 1890 | |
| Vascular Plant | Viola brittoniana | Britton's Violet | T | 2001 |