These are one of my favorite little frogs, maybe because I saw one in Selva Verde, Costa Rica years ago. They are about 3/4 inch long. They live in Costa Rica, Nicaragua and Colombia and have multiple names. They are poisonous in their native habitat on their usual diet, but are not poisonous in captivity, as their diet is different. They have an unusual way of reproducing. You can read about it here: http://www.anywherecostarica.com/flora-fauna/amphibian/blue-jeans-frog