Strolling the trails and beaches of the Lake Huron shoreline in Presque Isle County, Michigan is an excercise in constant distraction. There are all manner of birds, and one must generally keep their eyes elevated to spot those. But looking up is tough when plants such as Yellow Lady's-slippers, Cypripedium parviflorum, are quite literally roadside "weeds" in places. The individual in this photo is a gem of an orchid; an unusual double-flowered form.
The evergreen leaves are thick and coriaceous - leathery - and it's hard to see how a caterpillar could or would chomp into them. But at least one noteworthy cylindrical bag of goo does indeed make Bearberry its meal of choice.