Although this species is common in the dry Nothofagus solandri forest along the southern shores of Lake Ohau it is not present (so far) in the small patch of forest where Holcaspis bessatica and Holcaspis bathanae lie. However, as with the Megadromus omaramae-Megadromus sternalis pair at the same adjacent sites Holcaspis ohauensis is present the open habitat surrounding the forest.