Comprehensive guide to the Lepidoptera of the United States and northern Mexico, including a photographic identification guide, county checklists, and distribution maps.

A membership-based not-for-profit organization working to increase public enjoyment and conservation of butterflies.

Personal page of the co-author of several popular butterfly books.

Butterfly images, mostly from Arizona and Mexico, and information about the Butterflies of Arizona field guide.

Photographs of butterflies taken in Georgia, Florida, Texas, and Mexico.

Photo gallery of butterflies of northeastern Mexico and the Lower Rio Grande Valley.

Software to organize sightings and photos. Includes databases for North American butterflies, dragonflies, birds, and mammals.

Recent messages from many different regional butterfly and odonate e-mail groups.