These are tent caterpillars. This is the time of year when you see them, and this year they’re everywhere. Our mild winter means that more of them survived to do whatever tent caterpillars do to multiply. After they emerge from their cocoon-like “tents,” these little critters work their way down branches, eating their way through the fresh, tasty leaves. The guys you’re looking at here are about 3/4 of an inch long. They’re getting ready to defoliate some wild roses.