For those with a budding interest in lepidoptery (the study of butterflies), this fine online resource presented by the USGS's Northern Prairie Wildlife Research Center will be worth checking out. Currently, the site covers the butterfly species and populations throughout the United States and northern Mexico, with a section on Canada planned for the future. By utilizing the interactive map, visitors can click on any state to find out which butterflies inhabit any given area. After doing so, visitors can view photographs of the adult and larva of each species, and learn more about their distribution across each state and the entire United States as well. Visitors can even get more detailed information by looking at individualized checklists that detail which species have been reported at the county level throughout the country. The site also includes answers to commonly asked questions about butterflies and moths, such as What's the difference between a moth and a butterfly? and material on how to rear butterflies and moths.