Malayan Pit Viper 
Malayan softshell turtle 
Maltese Wall Lizard 
Manchurian Black Water Snake 
Maned forest lizard 
Mangrove Monitor 
Mangrove skink 
Mangshan pitviper 
Many-banded Coral Snake 
Many-banded krait 
Many-scaled anole 
Many-scaled cylindrical skink 
Marbled Crested Lizard 
Marbled Gecko 
Marbled leaf-toed gecko 
Marbled water monitor 
Maren's Bronzeback 
Marginated tortoise 
Marine iguana 
Maritime Gartersnake 
Marojejy leaf chameleon 
Marojejy Side-striped Chameleon 
Martinique Anole 
Massasauga snake