Marbled frog 
Marbled poison frog 
Marbled Rain Frog 
Marbled Reed Frog 
Marsh Frog 
Maryati's Torrent Frog 
Mascarene Grass Frog 
Masked Tree Frog 
Massif Madagascar Frog 
Matang narrow-mouthed frog 
Mato Grosso Snouted Tree Frog 
Mediterranean tree frog 
Meristogenys poecilus 
Metallic Robber Frog 
Mexican burrowing toad 
Mexican Leaf Frog 
Mexican narrow-mouthed toad 
Mexican white-lipped frog 
Micrixalus elegans 
Micrixalus kottigeharensis 
Microhyla heymonsi 
Microhyla nilphamariensis 
Middle East tree frog 
Mimic poison frog