Common Big-headed Frog 
Common coquí 
Common eastern froglet 
Common green frog 
Common Mexican tree frog 
Common midwife toad 
Common mudpuppy 
Common parsley frog 
Common puddle frog 
Common Southeast Asian Tree Frog 
Common Suriname toad 
Conant's Mushroomtongue Salamander 
Condoto Stubfoot Toad 
Congo caecilian 
Convict Treefrog 
Coorg Yellow Bush Frog 
Copan Stream Frog 
Cope's gray tree frog 
Copper-cheeked Frog 
Corroboree Frog 
Corrugated Frog 
Corrugated Water Frog 
Couch's Spadefoot 
Cranwells horned frog