List of Critically Endangered species in United States
This is a list of Critically Endangered species in United States according to the IUCN Red List.
This list was last updated 2019-09-14
This list contains only species that have been assessed for the IUCN Red List. It is therefore not representative of all the species in the country.
Species counts by country: Total | Amphibians | Birds | Fish | Mammals | Reptiles | Vascular Plants.
| scientific_name | common_name | taxonid | category |
|---|---|---|---|
| Nothocestrum peltatum | 30947 | CR | |
| Quercus graciliformis | Slender Oak | 30954 | CR |
| Pegias fabula | Little Winged Pearly Mussel | 16479 | CR |
| Quercus hinckleyi | Hinckley's Oak | 30955 | CR |
| Festuca aloha | 80232566 | CR | |
| Lysimachia daphnoides | 80232582 | CR | |
| Taxus floridana | Florida Yew | 30965 | CR |
| Torreya taxifolia | Florida Torreya | 30968 | CR |
| Achatinella apexfulva | Oahu Treesnail | 168 | CR |
| Achatinella bellula | 169 | CR | |
| Achatinella bulimoides | 171 | CR | |
| Achatinella byronii | 172 | CR | |
| Achatinella cestus | 175 | CR | |
| Achatinella concavospira | 176 | CR | |
| Achatinella curta | 177 | CR | |
| Achatinella decipiens | 178 | CR | |
| Achatinella fulgens | 182 | CR | |
| Achatinella fuscobasis | 183 | CR | |
| Achatinella lila | 188 | CR | |
| Achatinella lorata | 190 | CR | |
| Achatinella mustelina | 191 | CR | |
| Achatinella phaeozona | 193 | CR | |
| Achatinella pulcherrima | 194 | CR | |
| Achatinella pupukanioe | 195 | CR | |
| Achatinella sowerbyana | 197 | CR | |
| Achatinella stewartii | 199 | CR | |
| Achatinella swiftii | 200 | CR | |
| Achatinella taeniolata | 201 | CR | |
| Achatinella turgida | 203 | CR | |
| Achatinella viridans | 205 | CR | |
| Achatinella vulpina | 207 | CR | |
| Achatinella leucorrhaphe | 209 | CR | |
| Percina jenkinsi | Conasauga Logperch | 16589 | CR |
| Malaxis bayardii | Adder’s-mouth | 64176353 | CR |
| Plantago hawaiensis | 80175325 | CR | |
| Lysimachia iniki | 80232735 | CR | |
| Fallicambarus hortoni | Hatchie Burrowing Crayfish | 8493 | CR |
| Asplenium dielfalcatum | 78774610 | CR | |
| Myadestes lanaiensis | Hawaiian Thrush | 22708574 | CR |
| Coprosma kawaikiniensis | 91169123 | CR | |
| Myadestes palmeri | Puaiohi | 22708583 | CR |
| Asplenium dielpallidum | 78774640 | CR | |
| Lysimachia ovoidea | 80232847 | CR | |
| Popenaias popeii | 17992 | CR | |
| Melanthera fauriei | 80167382 | CR | |
| Melanthera kamolensis | 80167423 | CR | |
| Lysimachia pendens | 80233005 | CR | |
| Fusconaia cor | Shiny Pigtoe | 8778 | CR |
| Peristylus holochila | 64176722 | CR | |
| Lysimachia scopulensis | 80233116 | CR | |
| Melanthera micrantha | 80167580 | CR | |
| Gammarus desperatus | Noel's Amphipod | 8902 | CR |
| Lysimachia venosa | 80233182 | CR | |
| Melanthera micrantha subsp. micrantha | 80167648 | CR | |
| Melanthera micrantha subsp. exigua | 80167662 | CR | |
| Alasmidonta raveneliana | Appalachian Elktoe | 776 | CR |
| Melicope quadrangularis | Four-angled Pelea | 33559 | CR |
| Ochrosia kauaiensis | 33561 | CR | |
| Ochrosia kilaueaensis | 33562 | CR | |
| Alectryon macrococcus var. auwahiensis | 33574 | CR | |
| Clermontia oblongifolia subsp. brevipes | Oahu Clermontia | 33575 | CR |
| Clermontia oblongifolia subsp. mauiensis | 33576 | CR | |
| Cyanea hamatiflora subsp. carlsonii | 33580 | CR | |
| Cyanea horrida | 33582 | CR | |
| Melanthera tenuifolia | 80167726 | CR | |
| Euphorbia celastroides var. kaenana | 33600 | CR | |
| Euphorbia herbstii | 33602 | CR | |
| Euphorbia rockii | 33604 | CR | |
| Flueggea neowawraea | 33605 | CR | |
| Mezoneuron kavaiense | 33606 | CR | |
| Bonamia menziesii | 44129 | CR | |
| Hibiscus brackenridgei subsp. mokuleianus | 33625 | CR | |
| Hibiscus waimeae subsp. hannerae | 33627 | CR | |
| Quercus boyntonii | Boynton Oak | 33635 | CR |
| Urera kaalae | 30970 | CR | |
| Melicope haupuensis | 33666 | CR | |
| Melicope knudsenii | Knudsen's Melicope | 33669 | CR |
| Melicope mucronulata | 33672 | CR | |
| Melicope zahlbruckneri | Zahlbruckner's Melicope | 33681 | CR |
| Wikstroemia villosa | Hairy Wikstroemia | 30972 | CR |
| Xylosma crenatum | 30973 | CR | |
| Amastra cylindrica | 985 | CR | |
| Amastra micans | 986 | CR | |
| Amastra rubens | 987 | CR | |
| Amastra spirizona | 988 | CR | |
| Doryopteris angelica | 80233453 | CR | |
| Delissea waianaeensis | 79864848 | CR | |
| Melanthera waimeaensis | 80167978 | CR | |
| Cambarus laconensis | Lacon Exit Cave Crayfish | 164914 | CR |
| Amblema neislerii | Fat Threeridge | 1076 | CR |
| Plagopterus argentissimus | Woundfin | 17468 | CR |
| Kadua flynnii | 80233548 | CR | |
| Cyanea konahuanuiensis | 103801946 | CR | |
| Schiedea apokremnos | 80217216 | CR | |
| Sclerocactus brevispinus | Pariette Cactus | 181378 | CR |
| Euproserpinus wiesti | Prairie Sphinx Moth | 8373 | CR |
| Cupressus goveniana var. abramsiana | Santa Cruz Cypress | 34000 | CR |
| Hesperomannia arborescens | Lanai Hesperomannia | 34002 | CR |
| Hesperomannia arbuscula | Maui Hesperomannia | 34003 | CR |
| Elimia bellacrenata | Princess Elimia | 189659 | CR |
| Asplenium unisorum | 78775516 | CR | |
| Bidens sandvicensis subsp. confusa | 91153629 | CR | |
| Cyanea stictophylla | 34016 | CR | |
| Delissea kauaiensis | 34038 | CR | |
| Cyanea hamatiflora subsp. hamatiflora | 34044 | CR | |
| Alectryon macrococcus var. macrococcus | 34045 | CR | |
| Dubautia herbstobatae | 79865085 | CR | |
| Kadua haupuensis | 80233735 | CR | |
| Pleurobema collina | James River Spinymussel | 17677 | CR |
| Pleurobema rubellum | Warrior Pigtoe | 17692 | CR |
| Pleurocera corpulenta | Corpulent Hornsnail | 17699 | CR |
| Gulickia alexandri | 9560 | CR | |
| Lithobates sevosus | Dusky Gopher Frog | 58714 | CR |
| Melicope degeneri | 80233838 | CR | |
| Melicope lydgatei | 80168308 | CR | |
| Poa mannii | 80176565 | CR | |
| Pinus torreyana | Soledad Pine | 42424 | CR |
| Platydesma rostrata | 80233969 | CR | |
| Dalea sabinalis | Sabinal Prairie-clover | 19891725 | CR |
| Labordia triflora | 80092636 | CR | |
| Neraudia kauaiensis | 80234094 | CR | |
| Helminthoglypta walkeriana | Banded Dune Snail | 9859 | CR |
| Hemistena lata | Cracking Pearlymussel | 9907 | CR |
| Procambarus attiguus | Silver Glen Springs Cave Crayfish | 18192 | CR |
| Procambarus delicatus | Big-cheeked Cave Crayfish | 18196 | CR |
| Procambarus morrisi | Putnam County Cave Crayfish | 18205 | CR |
| Bridgeoporus nobilissimus | 76195622 | CR | |
| Poa siphonoglossa | 80176944 | CR | |
| Procambarus rogersi ssp. expletus | 18227 | CR | |
| Diplazium molokaiense | 78776120 | CR | |
| Schiedea haleakalensis | 80217972 | CR | |
| Astragalus sinuatus | Whited's Milkvetch | 19892102 | CR |
| Schiedea helleri | 80218137 | CR | |
| Melicope oppenheimeri | 103802920 | CR | |
| Armsia petasus | 2116 | CR | |
| Schiedea hookeri | 80218194 | CR | |
| Schiedea kauaiensis | 80218247 | CR | |
| Schiedea kealiae | 80218288 | CR | |
| Schiedea lydgatei | 80218307 | CR | |
| Schiedea nuttallii | 80218319 | CR | |
| Schiedea perlmanii | 80218373 | CR | |
| Schiedea membranacea | 80218429 | CR | |
| Dubautia latifolia | 79866204 | CR | |
| Megalagrion molokaiense | Molokai Damselfly | 59740 | CR |
| Megalagrion nesiotes | Flying Earwig Hawaiian Damselfly | 59741 | CR |
| Ptychobranchus jonesi | Southern Kidneyshell | 18826 | CR |
| Dubautia pauciflorula | 79866309 | CR | |
| Porites pukoensis | 133574 | CR | |
| Astragalus schmolliae | Schmoll's Milkvetch | 19892697 | CR |
| Hypomesus transpacificus | Delta Smelt | 10722 | CR |
| Dubautia plantaginea subsp. magnifolia | 80087527 | CR | |
| Pyrgulopsis bruneauensis | Bruneau Hot Springsnail | 18960 | CR |
| Marstonia castor | Beaverpond Marstonia | 18961 | CR |
| Pyrgulopsis erythropoma | Ash Meadows Pebblesnail | 18966 | CR |
| Marstonia ozarkensis | Ozark Pyrg | 18980 | CR |
| Idiostatus middlekaufi | Middlekauf's Shieldback Katydid | 10791 | CR |
| Pyrgulopsis neomexicana | Socorro Snail | 18977 | CR |
| Pyrgulopsis thermalis | New Mexico Hotspring Snail | 18988 | CR |
| Pyrgulopsis trivialis | Three Forks Springsnail | 18990 | CR |
| Pseudonestor xanthophrys | Maui Parrotbill | 22720753 | CR |
| Ostrya chisosensis | Chisos hop-hornbeam | 194284 | CR |
| Quadrula fragosa | Winged Mapleleaf | 19040 | CR |
| Theliderma intermedia | Cumberland Monkey-face Pearly Mussel | 19041 | CR |
| Theliderma sparsa | Appalachian Monkeyface | 19042 | CR |
| Amphinaias couchiana | 19045 | CR | |
| Theliderma tuberosa | 19051 | CR | |
| Radiocentrum avalonense | Catalina Mountain Snail | 19063 | CR |
| Eragrostis fosbergii | 80087743 | CR | |
| Lithobates subaquavocalis | Ramsey Canyon Leopard Frog | 19180 | CR |
| Pteris lidgatei | 78777080 | CR | |
| Cyanea grimesiana | 78777135 | CR | |
| Cyanea grimesiana subsp. grimesiana | 78777144 | CR | |
| Cyanea grimesiana subsp. obatae | 78777153 | CR | |
| Cyanea humboldtiana | 78777176 | CR | |
| Amorpha crenulata | Clusterspike False Indigo | 19893100 | CR |
| Consolea corallicola | Florida Semaphore Cactus | 16329591 | CR |
| Cyanea lobata | 78777213 | CR | |
| Cyanea lobata subsp. lobata | 78777234 | CR | |
| Cyanea lobata subsp. baldwinii | 78777250 | CR | |
| Laminella sanguinea | 11198 | CR | |
| Cyanea longiflora | 78777282 | CR | |
| Cyanea magnicalyx | 78777299 | CR | |
| Opuntia abjecta | 199640 | CR | |
| Cyrtandra dentata | 79129577 | CR | |
| Lampsilis streckeri | Speckled Pocketbook | 11244 | CR |
| Lampsilis virescens | Alabama Lamp Pearly Mussel | 11245 | CR |
| Branchinella lithaca | Stone Mountain Fairy Shrimp | 3055 | CR |
| Metrosideros polymorpha var. pseudorugosa | 103803885 | CR | |
| Cyanea mannii | 78777332 | CR | |
| Obovaria haddletoni | Haddleton Lampmussel | 11256 | CR |
| Cyanea st-johnii | St John's Rollandia | 44052 | CR |
| Cyanea truncata | Punaluu Cyanea | 44053 | CR |
| Cyrtandra kaulantha | Waikane Valley Cyrtandra | 44054 | CR |
| Cyrtandra polyantha | Niu Valley Cyrtandra | 44055 | CR |
| Gouania vitifolia | Oahu Chewstick | 44057 | CR |
| Alsinidendron obovatum | 44058 | CR | |
| Abutilon eremitopetalum | Hiddenpetal Indian Mallow | 44059 | CR |
| Abutilon menziesii | 44060 | CR | |
| Abutilon sandwicense | Greenflower Indian Mallow | 44061 | CR |
| Phlegmariurus nutans | 44062 | CR | |
| Phyllostegia kaalaensis | 44063 | CR | |
| Phyllostegia mollis | 44064 | CR | |
| Schiedea adamantis | 44065 | CR | |
| Labordia cyrtandrae | 44068 | CR | |
| Lobelia monostachya | 44069 | CR | |
| Schiedea kaalae | 44067 | CR | |
| Schiedea stellarioides | 80219174 | CR | |
| Alsinidendron lychnoides | 44073 | CR | |
| Achyranthes mutica | Blunt Chaff Flower | 44075 | CR |
| Astelia waialealae | 44079 | CR | |
| Brighamia insignis | 44080 | CR | |
| Brighamia rockii | 44081 | CR | |
| Cyanea crispa | 44092 | CR | |
| Cyanea dunbariae | 44095 | CR | |
| Cyanea gibsonii | 44097 | CR | |
| Cyanea glabra | 44098 | CR | |
| Cyanea asarifolia | 44100 | CR | |
| Clermontia peleana subsp. peleana | 44102 | CR | |
| Clermontia peleana subsp. singuliflora | 44103 | CR | |
| Cyanea asplenifolia | 44105 | CR | |
| Cyanea calycina | 44106 | CR | |
| Cyanea acuminata | Honolulu Cyanea | 44104 | CR |
| Alsinidendron trinerve | Three Nerved Alsinidendron | 44110 | CR |
| Alsinidendron viscosum | Climbing Alsinidendron | 44111 | CR |
| Argyroxiphium kauense | Kau Silversword | 44113 | CR |
| Bidens wiebkei | 44119 | CR | |
| Canavalia molokaiensis | Molokai Jack-bean | 44120 | CR |
| Canavalia napaliensis | Jack-bean | 44121 | CR |
| Canavalia pubescens | Jack Bean | 44122 | CR |
| Ctenitis squamigera | Pacific Lacefern | 44128 | CR |
| Euphorbia deppeana | 44130 | CR | |
| Euphorbia eleanoriae | 44131 | CR | |
| Euphorbia halemanui | 44132 | CR | |
| Euphorbia kuwaleana | 44133 | CR | |
| Cyanea platyphylla | 78777444 | CR | |
| Cyanea hamatiflora | 44139 | CR | |
| Centaurium sebaeoides | 44136 | CR | |
| Euphorbia remyi var. kauaiensis | 44148 | CR | |
| Euphorbia remyi var. remyi | 44149 | CR | |
| Euphorbia remyi | 44150 | CR | |
| Alectryon macrococcus | 44144 | CR | |
| Clermontia samuelii subsp. samuelii | 44154 | CR | |
| Clermontia samuelii subsp. hanaensis | 44155 | CR | |
| Achyranthes splendens var. rotundata | Round Chaff Flower | 44147 | CR |
| Argyroxiphium sandwicense subsp. sandwicense | Mauna Kea Silversword | 44158 | CR |
| Bidens campylotheca subsp. pentamera | Koko`olau | 44162 | CR |
| Bidens campylotheca subsp. waihoiensis | Koko`olau | 44163 | CR |
| Rhodacmea filosa | Wicker Ancylid | 19670 | CR |
| Lemiox rimosus | Birdwing Pearlymussel | 11479 | CR |
| Cyanea remyi | 78777599 | CR | |
| Cyanea rivularis | 78777626 | CR | |
| Acanthothecis leucoxanthoides | 80702763 | CR | |
| Acanthothecis paucispora | 80702772 | CR | |
| Lepidomeda albivallis | White River Spinedace | 11576 | CR |
| Silene alexandri | 80219480 | CR | |
| Melicope reflexa | 80172785 | CR | |
| Silene perlmanii | 80219542 | CR | |
| Cyanea shipmanii | 78777783 | CR | |
| Cyanea undulata | 78777794 | CR | |
| Cyanea mceldowneyi | 78777416 | CR | |
| Loxospora assateaguensis | 80702946 | CR | |
| Scaphirhynchus suttkusi | Alabama Sturgeon | 19942 | CR |
| Solanum incompletum | 80219624 | CR | |
| Leptoxis plicata | Plicate Rocksnail | 11783 | CR |
| Cambarus zophonastes | Hell Creek Cave Crayfish | 3678 | CR |
| Cambarus obeyensis | Obey Crayfish | 3677 | CR |
| Cambarus subterraneus | Delaware County Cave Crayfish | 3682 | CR |
| Cambarus tartarus | Oklahoma Cave Crayfish | 3683 | CR |
| Cambarus aculabrum | Benton County Cave Crayfish | 3688 | CR |
| Lexingtonia subplana | 11923 | CR | |
| Canis rufus | Red Wolf | 3747 | CR |
| Oxyloma kanabense | Kanab Amber Snail | 15780 | CR |
| Cyperus pennatiformis var. bryanii | 78786376 | CR | |
| Theliderma stapes | Stirrup Shell | 19043 | CR |
| Somatogyrus coosaensis | Coosa Pebblesnail | 20354 | CR |
| Somatogyrus crassus | Stocky Pebblesnail | 20349 | CR |
| Fraxinus quadrangulata | Blue Ash | 61919112 | CR |
| Somatogyrus currierianus | Tennessee Pebblesnail | 20356 | CR |
| Somatogyrus hendersoni | Fluted Pebblesnail | 20359 | CR |
| Somatogyrus quadratus | Quadrate Pebblesnail | 20366 | CR |
| Somatogyrus strengi | Rolling Pebblesnail | 20368 | CR |
| Somatogyrus tennesseensis | Opaque Pebblesnail | 20369 | CR |
| Cyanea membranacea | 91115476 | CR | |
| Pyrgulopsis ventricosa | Clear Lake Pyrg | 189681 | CR |
| Speoplatyrhinus poulsoni | Alabama Cavefish | 20467 | CR |
| Delphinapterus leucas Cook Inlet subpopulation | White Whale | 61442 | CR |
| Urocitellus brunneus | Northern Idaho Ground Squirrel | 20497 | CR |
| Stenogyne bifida | 80220185 | CR | |
| Somatogyrus humerosus | Atlas Pebblesnail | 20361 | CR |
| Somatogyrus nanus | Dwarf Pebblesnail | 20362 | CR |
| Somatogyrus pygmaeus | Pygmy Pebblesnail | 20365 | CR |
| Bombus franklini | Franklin's Bumble Bee | 135295 | CR |
| Labordia hosakana | 91115648 | CR | |
| Stenogyne campanulata | 80220290 | CR | |
| Oncorhynchus nerka COLUMBIA RIVER: Redfish Lk | Sockeye Salmon | 135309 | CR |
| Stenogyne kanehoana | 80220314 | CR | |
| Telespiza ultima | Nihoa Finch | 22720722 | CR |
| Psittirostra psittacea | Ou | 22720734 | CR |
| Stagnicola bonnevillensis | Fat-whorled Pondsnail | 20707 | CR |
| Stagnicola utahensis | Utah Ribbed Snail | 20706 | CR |
| Loxioides bailleui | Palila | 22720742 | CR |
| Oreomystis bairdi | Akikiki | 22720809 | CR |
| Paroreomyza maculata | Oahu Alauahio | 22720827 | CR |
| Loxops caeruleirostris | Akekee | 22720832 | CR |
| Lobelia gaudichaudii | 91115847 | CR | |
| Palmeria dolei | Crested Honeycreeper | 22720855 | CR |
| Sternotherus depressus | Flattened Musk Turtle | 20824 | CR |
| Melamprosops phaeosoma | Po'o-uli | 22720863 | CR |
| Procambarus machardyi | Caddo Chimney Crayfish | 153938 | CR |
| Polyscias bisattenuata | 80228720 | CR | |
| Tetramolopium capillare | 80220552 | CR | |
| Polyscias flynnii | 80228773 | CR | |
| Wikstroemia skottsbergiana | Skottsberg's Wikstroemia | 30971 | CR |
| Orconectes sheltae | Shelta Cave Crayfish | 153962 | CR |
| Margaritifera hembeli | Louisiana Pearlshell | 12803 | CR |
| Remya montgomeryi | 80212504 | CR | |
| Sanicula mariversa | 80212515 | CR | |
| Sanicula purpurea | 80212525 | CR | |
| Cyrtandra crenata | 78787179 | CR | |
| Medionidus penicillatus | Gulf Moccasinshell | 12928 | CR |
| Medionidus simpsonianus | Ochlockonee Moccasinshell | 12929 | CR |
| Medionidus walkeri | Suwannee Moccasinshell | 12930 | CR |
| Anas laysanensis | Laysan Teal | 22680203 | CR |
| Melicope adscendens | 80168163 | CR | |
| Megalagrion leptodemas | Crimson Hawaiian Damselfly | 12954 | CR |
| Betula lenta subsp. uber | Virginia Round-leaf Birch | 37556 | CR |
| Cercocarpus traskiae | Catalina Mahogany | 37562 | CR |
| Asplenium diellaciniatum | 80229055 | CR | |
| Asplenium dielmannii | 80229074 | CR | |
| Chasmistes liorus | June Sucker | 62197 | CR |
| Empetrichthys latos | Raycraft Ranch Poolfish | 62213 | CR |
| Dubautia kalalauensis | 80229156 | CR | |
| Tetramolopium rockii | 80220991 | CR | |
| Dubautia kenwoodii | 80229184 | CR | |
| Glyptemys muhlenbergii | Bog Turtle | 4967 | CR |
| Tetramolopium rockii var. calcisabulorum | 80221048 | CR | |
| Asplenium dielerectum | Asplenium-diellia | 78774453 | CR |
| Sadleria wagneriana | 80229274 | CR | |
| Lepiota luteophylla | Yellow-gilled Lepiota | 95384528 | CR |
| Lepiota rhodophylla | 95384531 | CR | |
| Micrarionta feralis | Fraternal Snail | 13300 | CR |
| Trematolobelia singularis | 80221174 | CR | |
| Vicia menziesii | Hawaiian Vetch | 80221227 | CR |
| Tettigidea empedonepia | Torreya Pygmy Grasshopper | 21680 | CR |
| Viola chamissoniana subsp. chamissoniana | 80221399 | CR | |
| Exocarpos luteolus | 80090352 | CR | |
| Hibiscus brackenridgei | 62743 | CR | |
| Geranium arboreum | 80090392 | CR | |
| Prunus murrayana | Murray Plum | 50623767 | CR |
| Moapa coriacea | Moapa Dace | 13602 | CR |
| Cottus paulus | Pygmy Sculpin | 5443 | CR |
| Pediocactus knowltonii | Knowlton's Cactus | 152903 | CR |
| Viola helenae | 80221505 | CR | |
| Gouania meyenii | 80090580 | CR | |
| Toxolasma cylindrellus | Pale Lilliput Naiad | 22013 | CR |
| Bidens micrantha subsp. ctenophylla | 16184855 | CR | |
| Pritchardia napaliensis | 38651 | CR | |
| Leptoxis melanoides | 177734 | CR | |
| Cyrtandra viridiflora | 79853183 | CR | |
| Hibiscadelphus giffardianus | 30396 | CR | |
| Crystallaria cincotta | Diamond Darter | 202435 | CR |
| Elassoma alabamae | Spring Pygmy Sunfish | 202436 | CR |
| Etheostoma chermocki | Vermilion Darter | 202461 | CR |
| Etheostoma marmorpinnum | Marbled Darter | 202502 | CR |
| Etheostoma percnurum | Duskytail Darter | 202513 | CR |
| Tropidoptera heliciformis | 22347 | CR | |
| Athyrium haleakalae | 114849613 | CR | |
| Pritchardia limahuliensis | 38741 | CR | |
| Myrsine juddii | 80172901 | CR | |
| Pritchardia affinis | 38641 | CR | |
| Pritchardia aylmer-robinsonii | 38642 | CR | |
| Dubautia plantaginea subsp. humilis | 79869827 | CR | |
| Pritchardia hardyi | 38646 | CR | |
| Pritchardia kaalae | 38647 | CR | |
| Tryonia brunei | Brune's Tryonia | 22423 | CR |
| Pritchardia munroi | 38650 | CR | |
| Lepidium orbiculare | 80230301 | CR | |
| Pritchardia schattaueri | 38653 | CR | |
| Pritchardia viscosa | 38655 | CR | |
| Noturus crypticus | Chucky Madtom | 202682 | CR |
| Cyprinodon diabolis | Devils Hole Pupfish | 6149 | CR |
| Cyanea kolekoleensis | 80230419 | CR | |
| Cyprogenia stegaria | Fanshell | 6184 | CR |
| Cicindela albissima | Coral Pink Sand Dunes Tiger Beetle | 64174124 | CR |
| Clermontia peleana | 30767 | CR | |
| Cyanea procera | Haha | 30769 | CR |
| Charpentiera densiflora | Papala | 30772 | CR |
| Hibiscus brackenridgei subsp. brackenridgei | 30775 | CR | |
| Eugenia koolauensis | 30778 | CR | |
| Nothocestrum breviflorum | Small-flowered Nothocestrum | 30784 | CR |
| Zanthoxylum dipetalum var. tomentosum | 30781 | CR | |
| Hibiscadelphus hualalaiensis | 30787 | CR | |
| Cyanea kuhihewa | 80230488 | CR | |
| Schiedea attenuata | 80230525 | CR | |
| Destuntzia rubra | 75102369 | CR | |
| Clermontia pyrularia | Pear Clermontia | 30914 | CR |
| Colubrina oppositifolia | 30915 | CR | |
| Cyanea marksii | Mark's Cyanea | 30920 | CR |
| Cambarus veitchorum | White Spring Cave Crayfish | 153812 | CR |
| Gardenia brighamii | Forest Gardenia | 30927 | CR |
| Hesperomannia lydgatei | Kauai Hesperomannia | 30929 | CR |
| Hibiscadelphus distans | 30930 | CR | |
| Hibiscus clayi | Clay's Hibiscus | 30931 | CR |
| Kokia drynarioides | Hawaiian Tree Cotton | 30933 | CR |
| Kokia kauaiensis | Kauai Koki'o | 30934 | CR |
| Myrsine mezii | 30943 | CR | |
| Neraudia ovata | Big Island Ma'oloa | 30945 | CR |
| Limbella fryei | 39156 | CR | |
| Hemignathus hanapepe | Kauai Nukupuu | 103823616 | CR |
| Isodendrion laurifolium | 80091402 | CR | |
| Ozobryum ogalalense | 39182 | CR | |
| Neraudia angulata | 80173352 | CR | |
| Hemignathus affinis | Maui Nukupuu | 103823664 | CR |
| Geothallus tuberosus | 39242 | CR | |
| Neraudia angulata var. angulata | 80173388 | CR | |
| Neraudia angulata var. dentata | 80173413 | CR | |
| Isodendrion pyrifolium | 80091503 | CR | |
| Dexteria floridana | Florida Fairy Shrimp | 6519 | CR |
| Neraudia sericea | 80173437 | CR | |
| Aglaothorax longipennis | Santa Monica Shieldback Katydid | 39312 | CR |
| Acrocephalus familiaris | Nihoa Millerbird | 22714797 | CR |
| Villosa trabalis | Cumberland Bean Pearly Mussel | 22976 | CR |
| Villosa perpurpurea | Purple Bean | 22977 | CR |
| Adenophorus periens | 78772698 | CR | |
| Artemisia kauaiensis | 91150858 | CR | |
| Plethobasus cicatricosus | White Warty-back Pearly Mussel | 17622 | CR |
| Plethobasus cooperianus | Orange-footed Pimpleback Mussel | 17623 | CR |
| Gardenia mannii | Mann's Gardenia | 31365 | CR |
| Panicum niihauense | 80173703 | CR | |
| Obovaria retusa | Ring Pink | 15020 | CR |
| Kadua coriacea | 80091826 | CR | |
| Dromus dromas | Dromedary Pearly Mussel | 6843 | CR |
| Dryopteris crinalis var. podosorus | 80231114 | CR | |
| Loxops ochraceus | Maui Akepa | 103824084 | CR |
| Sarracenia oreophila | Green Pitcherplant | 39718 | CR |
| Pleurobema clava | Club Naiad | 17665 | CR |
| Sarracenia rubra subsp. alabamensis | 39725 | CR | |
| Pleurobema curtum | Curtus's Mussel | 17666 | CR |
| Pleurobema marshalli | Marshall's Mussel | 17667 | CR |
| Kadua degeneri | 80091967 | CR | |
| Pleurobema plenum | Rough Pigtoe Pearly Mussel | 17669 | CR |
| Dryopteris glabra var. flynnii | 80231256 | CR | |
| Pleurobema chattanoogaense | Painted Clubshell | 17676 | CR |
| Kadua degeneri subsp. degeneri | 80092017 | CR | |
| Dryopteris glabra var. pusilla | 80231286 | CR | |
| Pleurobema furvum | Dark Pigtoe | 17681 | CR |
| Pleurobema georgianum | Southern Pigtoe | 17682 | CR |
| Pleurobema gibberum | Cumberland Pigtoe | 17683 | CR |
| Pleurobema hanleyianum | Georgia Pigtoe | 17685 | CR |
| Elaphrus viridis | Delta Green Ground Beetle | 7120 | CR |
| Oncorhynchus apache | Apache Trout | 15316 | CR |
| Inflectarius magazinensis | Magazine Mountain Shagreen | 39942 | CR |
| Lepidium arbuscula | 80165940 | CR | |
| Delissea rhytidosperma | 79862837 | CR | |
| Kadua degeneri subsp. coprosmifolia | 80092214 | CR | |
| Balaenoptera edeni Gulf of Mexico subpopulation | Gulf of Mexico Whale | 117636167 | CR |
| Kadua laxiflora | 80092248 | CR | |
| Polyscias gymnocarpa | Koolau Tetraplasandra | 34007 | CR |
| Epioblasma florentina ssp. walkeri | Brown-blossom Pearly Mussel | 40042 | CR |
| Geranium kauaiense | 80231538 | CR | |
| Kadua parvula | 80092275 | CR | |
| Pinus torreyana subsp. torreyana | Torrey Pine | 34015 | CR |
| Kadua st-johnii | 80092309 | CR | |
| Labordia tinifolia var. wahiawaensis | 34022 | CR | |
| Phyllostegia haliakalae | 80174299 | CR | |
| Lobelia koolauensis | 80166134 | CR | |
| Phyllostegia hirsuta | 80174327 | CR | |
| Phyllostegia hispida | 80174349 | CR | |
| Kanaloa kahoolawensis | 80092456 | CR | |
| Phyllostegia knudsenii | 80174379 | CR | |
| Polyscias racemosa | 34055 | CR | |
| Phyllostegia mannii | 80174419 | CR | |
| Phyllostegia parviflora | 80174447 | CR | |
| Phyllostegia parviflora var. parviflora | 80174481 | CR | |
| Elimia ampla | Ample Elimia | 7582 | CR |
| Elimia annettae | Lily Shoals Elimia | 7583 | CR |
| Elimia troostiana | Mossy Elimia | 7617 | CR |
| Phyllostegia parviflora var. glabriuscula | 80174541 | CR | |
| Elliptio nigella | Recovery Pearly Mussel | 7631 | CR |
| Elliptio steinstansana | Tar River Spiny Mussel | 7634 | CR |
| Phyllostegia parviflora var. lydgatei | 80174575 | CR | |
| Pacifastacus fortis | Placid Crayfish | 15866 | CR |
| Cyrtandra paliku | 80231951 | CR | |
| Palaemonetes cummingi | Squirrel Chimney Cave Shrimp | 15886 | CR |
| Phyllostegia pilosa | 80174634 | CR | |
| Schiedea verticillata | 80219238 | CR | |
| Lobelia oahuensis | 80166506 | CR | |
| Phyllostegia electra | 80232055 | CR | |
| Phyllostegia helleri | 80232087 | CR | |
| Phyllostegia kahiliensis | 80232109 | CR | |
| Epioblasma brevidens | Cumberlandian Combshell | 7865 | CR |
| Epioblasma florentina ssp. curtisi | Curtis' Naiad | 7870 | CR |
| Epioblasma metastriata | Upland Combshell | 7876 | CR |
| Epioblasma othcaloogensis | Southern Acorn Riffle Shell | 7877 | CR |
| Epioblasma penita | Penitent Mussel | 7878 | CR |
| Lysimachia lydgatei | 80166609 | CR | |
| Epioblasma obliquata ssp. perobliqua | White Cat's Paw Mussel | 7894 | CR |
| Phyllostegia renovans | 80232159 | CR | |
| Phyllostegia waimeae | 80174830 | CR | |
| Cookeconcha contorta | 40716 | CR | |
| Endodonta apiculata | 40717 | CR | |
| Phyllostegia warshaueri | 80174894 | CR | |
| Wilkesia hobdyi | Dwarf Iliau | 80224047 | CR |
| Lasmigona decorata | Carolina Heelsplitter | 11360 | CR |
| Schiedea viscosa | 80230682 | CR | |
| Stenogyne kealiae | 80232294 | CR | |
| Delissea takeuchii | 79863661 | CR | |
| Lysimachia maxima | 80166801 | CR | |
| Labordia helleri | 80232348 | CR | |
| Cyrtandra subumbellata | 79830986 | CR | |
| Phyllostegia wawrana | 80175066 | CR | |
| Partulina confusa | 16350 | CR | |
| Partulina dubia | 16358 | CR | |
| Labordia lorenceana | 80232429 | CR |
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Species are classified by the IUCN Red List into nine groups: