Colorful grass moth (Crambidae: likely Glyphodes rubrocinctalis) from Monteverde, Costa Rica. Check out those odd transparent spots on the hindwings.
Firefly-mimicking moth (Arctiidae: Lithosiinae: Rhabdatomis sp.) from Costa Rica. Why mimic a firefly? Because some of them (Lampyridae, actually beetles) contain a potent class of toxins called lucibufagins and so are avoided by many predators - thus, the moth reaps the benefits of decreased predation without actually being toxic.