Butterflies of the Northern Colorado Front Range

Photographs, Species Accounts and Checklists

A general guide to the butterflies of the Northern Colorado Front Range, defined to include the following counties: Boulder, Broomfield, Clear Creek, Douglas, Gilpin, Jefferson, Larimer, and Park.

For ongoing discussion about butterflying and other topics, please visit the Colorado Butterflies Google Group by clicking here.


This website is intended to be an evolving resource and guide that provides an accessible reference to the butterflies of the Northern Colorado Front Range, with photographs and information collected and contributed by butterfly watchers across the Front Range region.

We hope you will join us in searching for, photographing and submitting your butterfly photos. If you have photos to contribute, please contact the webmaster. We ask that all of the butterflies documented on this website will have been observed and preferably photographed in the prescribed Front Range area. If you wish to share a butterfly sighting or other pertinent butterfly information, please use the Colorado Butterflies Google Group link at the top of this page.

News & Events

Front Range Butterfly Guide

BUTTERFLIES OF THE COLORADO FRONT RANGE: A Photographic Guide to 80 Species, by Janet R. Chu and Stephen R. Jones. The guide covers the common species seen along the Colorado Front Range, their description, habitat, transformation and adaptations. In addition to... read more

2016 California Lepidoptera Classes

Instructors:  Paul Opler, Evi Buckner, and Jerry Powell  June 20-24, 2016– Natural History of Sierra Nevada butterflies at the San Francisco State’s Sierra Nevada Field Campus near Yuba Pass, the 17th year that Paul and Evi have taught this class.  June... read more
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