Petroglyphs

Looking back at 25 years of the Petroglyphs Butterfly Count Peterborough Examiner  – August 22, 2025 – by Drew Monkman  Last summer marked a milestone for local butterfly enthusiasts: the 25th Petroglyphs Butterfly Count. The first count was held in 1998, and since 2001 volunteers have gathered every mid-July—peak season for butterfly Read more