Kochs giant day gecko 
Kodaikanal Dravid Gecko 
Kollegal Ground Gecko 
Komodo dragon 
Kopstein's Emo Skink 
Kotschy's gecko 
Kuhl's Flying Gecko 
Kuhl's flying gecko 
Kulzer's Rock Lizard 
Lace monitor 
Lance-nosed chameleon 
Land Mullet 
Laotian wolf snake 
Large Psammodromus 
Large-eyed pitviper 
Large-scaled Pit Viper 
Large-scaled tree viper 
Larutia penangensis 
Lateral Water Snake 
Leaf-nosed lizard 
Leatherback sea turtle 
Lebanese Thin-toed Gecko 
Lebanon Lizard 
Lebanon viper