Machimus atricapillus - side basking on leaf, Heeswijk-Dinther, Netherlands

This is a another demonstration of peculiar behavior that is specific to this species of robberfly. When you consider the angle of the leaf, it coming towards the viewer, we should be looking at the back or top of the robberfly if it was sitting straight. Instead, we're still looking at its side. Its tilting its body in such a way that one side is exposed to the sun.