 The usual host plants for the larvae are the canyon live oak ("Quercus chrysolepis") and the coast live oak ("Quercus agrifolia"), as well as other species of oaks.This diet makes "A. californica" unpalatable to predators, which might explain why so many other species have formed a mimicry complex around it.The adults are commonly found flying near the upper branches of oak trees or perching near small streams and canyons.