Both photos on this page are of Photuris pennsylvanicus, a firefly, at Twin Lakes, in Gunbarrel. Photos by Randy Gietzen.

For more information see the latest BCNA Buzz or Newsletter.

The Boulder County Nature Association (BCNA) is a private, non-profit, publicly funded organization committed to preservation of the cultural and natural history of Boulder County and adjacent areas of the Colorado Front Range.

We conduct and support natural area studies, flora and fauna studies, historical research, wildlife inventories, and geological research.

We also disseminate natural and cultural history information to the public through nature hikes, classes, slide programs, publications, seminars, support for interpretive facilities in Boulder County, and an annual symposium on the status of Boulder County ecosystems.

We work with the Boulder County community to manage our local ecosystems so that they are sustainable and healthy.

Current Events

July 10: Native Bees and Natural Diversity class begins

July 13: BCNA board meeting

July 24: Microphotography: Wildflowers, Butterflies, Beetles, and Much More class begins

For more events, please see the listing in the Newsletter.

Monthly Nature Almanac



KGNU features a short program with Steve Jones and Ruth Carol Cushman on the first Friday of every month. For each program, they visit a Boulder County nature site to record sounds there and discuss topics of interest. They are also the authors of Wild Boulder County: A Seasonal Guide to the Natural World.

The programs are archived by month, with information about events happening in the natural world in Boulder County for that month.

July 2014 Audio: Fireflies

July Seasonal Events in Boulder County



Coming soon!

You will soon be able to learn about dragonflies of the Colorado Front Range from this beautiful and colorful new 112-page publication of the Boulder County Nature Association. Check back in August to see how and where you can purchase your own copy of Dragonflies of the Colorado Front Range by Ann Cooper.

Dragonfly Cover


Nature-Net is BCNA's email forum for announcements of classes and trips and discussions of many topics relating to Boulder County's natural environment. Nature-Net subscription information.