Females lay a clutch of round, yellow eggs that become red over a few days. Larvae are mimics of twigs and branches. Their slender bodies stretch along tree branches and forms little loops as they inch their way around a tree. A mottled brown coloring aids in camouflaging them, and small hairs fringe the bottom edges of their bodies. These caterpillars feed on the leaves of various deciduous trees like alder, ash, beech, birch, elm, oak, poplar, and willow. Each year, one or two broods can be produced.
The Pale Beauty can be found where host trees are growing such as forests and woodlands in wilderness as well as more developed areas.