Butterfly Survey Reports

BUTTERFLIES IN BOULDER COUNTY

Butterfly Surveys have been completed on some Boulder County Open Space properties from 2002 to 2026 by Janet R. Chu and her butterfly research team.  Boulder County Parks and Open Space (BCPOS) and Boulder County Nature Association (BCNA) have encouraged and partially funded these important surveys with the resulting reports and analyses of trends. BCNA funded the 2007 continuation of a research program to survey Boulder County butterflies and the preparation of a 74-page report. The BCPOS Small Grants Program supported the surveys in 2004-2006.  Since then, monitoring of butterflies on Boulder County Open Space properties has been partially funded by the BCPOS and the BCNA Small Grants Programs. Links to later reports (PDF) on the Boulder County website are listed below.  

• Butterfly Research in Boulder County 2004 - 2007
• Butterflies A Continuing Study of Species and Populations In Boulder County Open Space Properties - 2011 Inventory and 2007-2011 Analyses
• Summary report of butterfly observations on the Anne U. White Trail in Boulder County before the September 2013 flood
• Additional Boulder County butterfly survey reports are published on the Boulder County website. (Search for Chu butterflies).

Butterfly Counts have been held at the Cal-Wood Education Center every July 4 for 42 years, 1984-2026. Cal-Wood is a registered nonprofit that connects children and adults to the Colorado mountains through environmental education, conservation, and recreation and is located near Jamestown, Colorado. A 29-page report on the Cal-Wood butterfly counts covering 1984 to 2014 is available as a PDF (3.8 MB).

• Cal-Wood Fourth of July Butterfly Counts, 1984-2014 

The field guides, Butterflies of the Colorado Front Range, 1^st and 2^nd editions, by Janet R. Chu and Stephen R. Jones, stem from research partially supported by the Boulder County Nature Association.