Two unrelated butterfly species may develop the same wing pattern, but along different pathways

An international team of scientists working with Heliconius butterflies at the Smithsonian Tropical Research Institute in Panama was faced with a mystery: How do pairs of unrelated butterflies from Peru to Costa Rica evolve nearly the same wing-color patterns over and over again? The answer, ...This is an NSF Multimedia Gallery item.
Source: NSF Multimedia Gallery - Category: Science Source Type: video