The high toxicity of "P. terribilis" may be due to eating small insects or other arthropods, and one of these may truly be the most poisonous creature on Earth. Scientists have suggested the crucial insect may be a small beetle from the family Melyridae. At least one species of these beetles produces the same toxin found in "P. terribilis". Their relatives in Colombian rainforests could be the source of the batrachotoxins found in the highly toxic "Phyllobates" frogs of that region.