| Species Name | Status | See Also |
| Bat, Mexican long-nosed | E | |
| Bear, Louisiana black | T | |
| Jaguarundi | E | |
| Manatee, West Indian (=Florida) | E | FL, PR |
| Ocelot | E | |
| Crane, whooping | E | FL, NE |
| Curlew, Eskimo | E | |
| Eagle, bald | E | IN, KS, LA, ME, MN, MO, MT, OH, WI, WY |
| Falcon, American peregrine | E | AK, CA, MN, MT, NY, OH, PA, VT, WI |
| Falcon, Arctic peregrine | T | AK |
| Falcon, northern aplomado | E | |
| Pelican, brown | E | |
| Plover, piping | T | CT, MA, ND, SD |
| Prairie-chicken, Attwater's greater | E | |
| Tern, least (interior population) | E | IN, CA, ND, SD |
| Vireo, black-capped | E | OK |
| Warbler (wood), golden-cheeked | E | |
| Woodpecker, red-cockaded | E | AR, SC |
| Snake, Concho water | T | |
| Turtle, green sea | T | FL |
| Turtle, hawksbill sea (=carey) | E | |
| Turtle, Kemp's (=Atlantic) ridley sea | E | |
| Turtle, leatherback sea | E | PR, VI |
| Turtle, loggerhead sea | T | FL |
| Salamander, San Marcos | T | |
| Salamander, Texas blind | E | |
| Toad, Houston | E | |
| Darter, fountain | E | |
| Gambusia, Big Bend | E | |
| Gambusia, Clear Creek | E | |
| Gambusia, Pecos | E | |
| Gambusia, San Marcos | E | |
| Pupfish, Comanche Springs | E | |
| Pupfish, Leon Springs | E | |
| Beetle, Kretschmarr Cave mold | E | |
| Beetle, Tooth Cave ground | E | |
| Harvestman, Bee Creek Cave | E | |
| Pseudoscorpion, Tooth Cave | E | |
| Spider, Tooth Cave | E | |
| Bladderpod, white | E | |
| Cactus, black lace | E | |
| Cactus, bunched cory | T | |
| Cactus, Chisos Mountain hedgehog | T | |
| Cactus, Lloyd's hedgehog | E | |
| Cactus, Lloyd's Mariposa | T | |
| Cactus, Nellie cory | E | |
| Cactus, Sneed pincushion | E | |
| Cactus, Tobusch fishhook | E | |
| Cats-eye, Terlingua Creek | E | |
| Dawn-flower, Texas prairie (Texas bitterweed) | E | |
| Dogweed, ashy | E | |
| Frankenia, Johnston's | E | |
| Ladies'-tresses, Navasota | E | |
| Manioc, Walker's | E | |
| Oak, Hinckley's | T | |
| Pennyroyal, McKittrick | T | NM |
| Phlox, Texas trailing | E | |
| Pitaya, Davis' green | E | |
| Pondweed, Little Aguja | E | |
| Poppy-mallow, Texas | E | |
| Rush-pea, slender | E | |
| Sand-verbena, large-fruited | E | |
| Snowbells, Texas | E | |
| Wild-rice, Texas | E | |
