Coral trout 
Coral-billed Nuthatch 
Corallus ruschenbergerii 
Coraya wren 
Cordilleran canastero 
Cordilleran parakeet 
Corn bunting 
Corn snake 
Coroneted fruit dove 
Corroboree Frog 
Corrugated Frog 
Corrugated Water Frog 
Corsac fox 
Corsican finch 
Corsican nuthatch 
Cortez rainbow wrasse 
Corvus albus x edithae 
Cory's shearwater 
Corythoichthys nigripectus 
Coscoroba Swan 
Cosmetic Wrasse 
Costa Rica Water Snake 
Costa Rican Coralsnake 
Costa Rican pygmy owl