Had to look it up, here is what I found:

Black witches thrive on woody species host plants including mesquite, acacia, locust, and Kentucky coffee. Caterpillars feed on the leaves during the night, and spend daylight hours tucked under bark crevices. Adults can feed on tree sap.

Source: https://blog.nature.org/2020/10/12/black-witch-moths-a-night-time-trick-or-treat/