Have you looked closely at your arborvitaes and other bagworm-susceptible evergreens such as Juniper? Bagworms are a little easier to see now as the needle clad "bags" are beginning to turn brown. These caterpillars can creep up on you and strip a plant before you know it so keep your eyes out and regularly inspect. I have been watching a nearby arborvitae and noticed that the bags on this particular plant in Clark County are anywhere from 1/4" to 1" in size. As they get bigger, they are much easier to spot. When bagworms first hatch, it's even a challenge to the untrained eye to find them.