Butterfly species evolution in action

Scientists have found a population of tropical butterflies that may be on its way to splitting into two distinct species based on wing color and mate preference. Researchers describe the relationship between diverging color patterns in Heliconius butterflies and the long-term divergence of populations into new and distinct species. For more, visit http://www.nsf.gov/news/news_summ.jsp?cntn_id=115885&org=NSF