The redhumped caterpillar, Schizura concinna (Notodontidae), is found throughout much of the United States. In California, high populations are usually limited to the Central Valley.

This pest most commonly chews leaves of liquidambar (sweet gum), plum, and walnut. It also feeds on almond, apple, apricot, birch, cherry, cottonwood, pear, prune, redbud, willow, and other deciduous trees and shrubs.