Knobbed Pacific iguana 
Knobloch's Mountain Kingsnake 
Knuckles Bent-toed Gecko 
Knuckles Pygmy Lizard 
Knysna dwarf chameleon 
Koch's Giant Day Gecko 
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