Have you been noticing fewer butterflies in your area? Chatham Co. Extension Agent Debbie Roos did, and she asked a butterfly expert about it. I hope you find her blog post as interesting as I do: http://growingsmallfarms.ces.ncsu.edu/2014/07/where-are-all-the-butterflies/
Extension Master Gardener Volunteers of Durham County
Research-based gardening information for Durham County, NC
Extension Master Gardener Volunteers of Durham County 