Butterflies are typically distinguished from moths by the club-shaped
thickenings at the ends of their antennæ, and by the fact that when
settling, the wings are folded together over the back. In moths the
antennæ may be of various form, but very rarely club-shaped, and the
rest-position of the wings is horizontal or sloping downward, while in
some instances they may be more or less wrapped round the body.