These caterpillars can be found across southern Canada, in the western US, and in the Appalachians to South Carolina and Kentucky. The adults fly from May to July with the larvae being found from July to September. The caterpillars prefer to feed on leaves of poplar and willow, but will also feed on alder, basswood, birch, maple, and oak. Tussock moths get the name “tussock” from the tufts of hair on the caterpillar.
Photos by Morgan McNeill on 8/26/20 in Lolo, MT.