| Classification | Species/Listing Name |
|---|---|
| Amphibians | |
| Hellbender, Ozark (Cryptobranchus alleganiensis bishopi) | |
| Birds | |
| Black Rail (Laterallus jamaicensis) | |
| Crane, whooping (Grus americana) | |
| Plover, piping (Charadrius melodus) | |
| Red Knot (Calidnis canutus) | |
| Woodpecker, ivory-billed entire (Campephilus principalis) | |
| Woodpecker, red-cockaded (Dryobates borealis) | |
| Crayfish | |
| Crayfish, cave (Cambarus aculabrum) | |
| Crayfish, cave (Cambarus zophonastes) | |
| Fish | |
| Cavefish, Ozark (Amblyopsis rosae) | |
| Darter, Arkansas (Etheostoma cragini) | |
| Darter, leopard (Percina pantherina) | |
| Darter, yellowcheek (Etheostoma moorei) | |
| Shiner, Arkansas River Arkansas R. Basin (Notropis girardi) | |
| Sturgeon, pallid (Scaphirhynchus albus) | |
| Insects | |
| Beetle, American burying (Nicrophorus americanus) | |
| Mammals | |
| Bat, gray (Myotis grisescens) | |
| Bat, Little Brown (Myotis lucifugus) | |
| Bat, Indiana (Myotis sodalis) | |
| Bat, northern long-eared (Myotis septentrionalis) | |
| Bat, Ozark big-eared (Corynorhinus (=Plecotus) townsendii ingens) | |
| Mollusks | |
| Fatmucket, Arkansas (Lampsilis powellii) | |
| Mapleleaf, winged (Quadrula fragosa) | |
| Mucket, pink (pearlymussel) (Lampsilis abrupta) | |
| Mucket, Neosho (Lampsilis rafinesquena) | |
| Mussel, scaleshell (Leptodea leptodon) | |
| Mussel, fanshell (Cyprogenia stegaria) | |
| Mussel, ring pink (Obovaria retusa) | |
| Mussel, rabbitsfoot (Quadrula cylindrica) | |
| Mussel, spectaclecase (Cumberlandia monondonta) | |
| Mussel, snuffbox (Epioblasma triquetra) | |
| Pearlshell, Louisiana (Margaritifera hembeli) | |
| Pearlymussel, Curtis (Epioblasma florentina curtisii) | |
| Pocketbook, fat (Potamilus capax) | |
| Pocketbook, Ouachita rock (Arkansia wheeleri) | |
| Pocketbook, speckled (Lampsilis streckeri) | |
| Turgid blossom (Epioblasma turgidula) | |
| Reptiles | |
| Alligator, American (Alligator mississppiensis) |
All other federally-listed Arkansas species or candidates listed on the U.S. Fish and Wildlife Service site (https://ecos.fws.gov/ecp0/reports/species-listed-by-state-report?state=AR&status=listed), as they are added or deleted, are included in this Addendum.