Toxicity
Like all Dendrobatidae, D. leucomelas frogs secrete toxins from their skin, which they gain from eating certain unspecified arthropod prey. It is uncertain precisely which arthropods lend their toxicity to which genus of Dendrobatidae, but one such arthropod is thought to have been identified as a possible source of the toxin for Dendrobatidae Phyllobates terribilis (aka the golden poison frog), and it is a local variant of the Melyrid beetle.
Dendrobatidae toxins vary from species to species, but some are extremely potent neurotoxins. The alkaloid toxins, secreted from the frogs' skin, interfere with nerve impulses, which can lead to heart failure or fibrillation.
Further information: Poison dart frog toxicity See also: Allopumiliotoxin 267A, Batrachotoxin, Epibatidine, Histrionicotoxin, and Pumiliotoxin 251DRead more about this topic: Yellow-banded Poison Dart Frog