Identification
forewing pale gray and faintly mottled; 3 tufts of scales protrude from the basal half of the costa, giving the wing edges a bumpy appearance; a double postmedial (PM) line curves under the almost invisible reniform spot, then continues in a straight line to the inner margin of the wing; terminal line composed of several black dots
Range
California to Florida, north to Nova Scotia, west to Saskatchewan, plus BC
Season
adults fly in June and July in the north
larvae from May to September
Food
larvae feed on beech, oak, and willow
Life Cycle
1 or more generations, depending on latitude
Internet References
live adult images plus description and other info (Lynn Scott, Ontario)
live larva image plus description and other info (Caterpillars of Eastern Forests, USGS)