The North American Butterfly Association has run the Butterfly Count Program in the United States, Canada, and Mexico since 1993. Each of the approximately 450 counts consists of a compilation of all butterflies observed at sites within a 15-mile diameter count circle in a one-day period. The annually published reports provide a tremendous amount of information about the geographical distribution and relative population sizes of the species counted. Comparisons of the results across years can be used to monitor changes in butterfly populations and study the effects of weather and habitat change on North American butterflies.
Three of the main goals of NABA’s Butterfly Count Program are to (1) gather data that will monitor butterfly populations, (2) give butterfliers a chance to socialize and have fun, and (3) raise public awareness by hosting events that will increase general interest in butterflies. A minimum of four observers and six party-hours best meets these three goals.
Counts are open to public participation and new participants are encouraged. Depending on the count, one or more count parties will survey sites within the 15-mile diameter count circle on a given day. The compiler will let you know when and where to meet. There is a $3.00 fee to participate in a count.
For additional information on NABA butterfly counts, please visit https://naba.org/butter_counts.html