A widespread and commonly encountered Salicaceae-feeding Catocala species as a larva, and also the most easily recognized among those several dozen species. Body color pale to creamy white throughout, with strongly contrastingly demarked dark A5 saddle patch, litle evidence of lateral striping; typically with just indistinct darker stippling over body, but some larvae with patchy dark splotches, rarely nearly completely darkened body; lateral filaments numerous and quite long, "eye-lashy" and thin; head capsule covered with noticeably lattice-like dark reticulations, especially beyond the lobes and vertex and sides thereby accentuating the two wide and prominent whitish/cream chevrons; venter white with black spots edged with orange at their bases on A3-A7, particularly A3-A5; spots also typically prominent on T2-T3. Most wild larval records are for Populus, especially Populus tremuloides, and only occasionally Salix.