Host plants:
The larvae are polyphagous on deciduous wood such as Salix, Tilia, Ligustrum, Prunus and Quercus.
Habitat:
Brachionycha sphinx is a resident of the deciduous forests and other grove-rich areas.
Life cycle:
The egg hibernates and the caterpillar is observed from late April to mid-June. Brachionycha sphinx flies in October and November, and occasionally as late as December.
Remarks:
Brachionycha sphinx is widespread in central and parts of Northern Europe, but occurs in Southern Europe only in the mountains. Here it reaches also Asia Minor.