ARKive's most wanted species listed alphabetically by scientific name
| Scientific name | Common name | Status |
|---|---|---|
| Kadarsanomys sodyi | Sody's Tree Rat | VU |
| Kajikia albida | White Marlin | VU |
| Kalappia celebica | VU | |
| Kaliella aldabra | EN | |
| Kaliella hongkongensis | VU | |
| Kalophrynus intermedius | VU | |
| Kalophrynus minusculus | VU | |
| Kalophrynus punctatus | VU | |
| Kaloula kalingensis | Smooth-fingered Narrow-mouthed Frog | VU |
| Kaloula rigida | Luzon Narrow-mouthed Frog | VU |
| Kanakysaurus viviparus | EN | |
| Kanakysaurus zebratus | EN | |
| Kapcypriodopsis barnardi | CR | |
| Karocolens tuberculatus | EX | |
| Kassina jozani | EN | |
| Katechonemertes nightingaleensis | VU | |
| Kaunia pachanoi | EN | |
| Kawanphila pachomai | EN | |
| Kayea macrophylla | VU | |
| Keetia bakossii | CR | |
| Keetia koritschoneri | VU | |
| Keetia purpurascens | VU | |
| Kerivoula africana | Tanzanian Woolly Bat | EN |
| Kerivoula flora | Flores Woolly Bat | VU |
| Kerkia brezicensis | VU | |
| Kerkia kusceri | CR | |
| Kermadecia pronyensis | VU | |
| Khadia beswickii | CR | |
| Khaya grandifoliola | Senegal mahogany | VU |
| Khaya ivorensis | Lagos mahogany | VU |
| Kibatalia borneensis | EN | |
| Kibatalia longifolia | CR | |
| Kibatalia merrilliana | VU | |
| Kibatalia wigmani | VU | |
| Kimboraga exanimus | EN | |
| Kimboraga koolanensis | VU | |
| Kimboraga micromphala | VU | |
| Kimboraga yammerana | VU | |
| Kingiodendron pinnatum | EN | |
| Kinosternon angustipons | Narrow-bridged Mud Turtle | VU |
| Kinosternon dunni | Dunn's Mud Turtle | VU |
| Knema austrosiamensis | VU | |
| Knema bengalensis | VU | |
| Knema emmae | VU | |
| Knema hookerana | VU | |
| Knema kostermansiana | VU | |
| Knema krusemaniana | VU | |
| Knema lamellaria | VU | |
| Knema lampongensis | VU | |
| Knema longepilosa | VU |