 The addition of molecular data has allowed researchers to resolve clades in many lineages.Evidence is gleaned from paleontology where some 50 butterfly fossils have been identified, from morphology and the study of homologies, from molecular genetics and comparative biochemistry, from comparative ethology, and from present-day geographical distributions and ecology.Even though butterflies are among the most studied insects, new findings are coming to light almost every month, and the prospect of a stable butterfly classification based on strongly supported clades is seemingly within reach.