Phyllobates Terribilis (Mint) search through leaf litter for fruit flies to snack on. Mint Terribilis are rather large as far as dart frogs go. They are bold and have a great call as well! 

Phyllobates Terribilis Mint Poison Dart Frogs looking for fruit flies in their vivarium
Phyllobates Terribilis Mint Poison Dart Frogs looking for fruit flies in their vivarium

These little guys are part of Pauls Jungle Exotics collection, located in Rhode Island.