Catocala cara is a large underwing. The hindwing fringe is off-white and heavily checked with black along the veins. The ground colour of the forewings is grayish-purple with gray-green mottling and sharply defined black postmedial and antemedial lines that extend from the costa downwards to mid-wing.
The undersides are not
nearly as spectacular. The apex of all wings is darker than that
of most other species.
Catocala cara, Peterborough, Ontario, August 19, 2004, Tim Dyson copyright
These moths seem to fly consistently with their legs apparently ready for landing.
Catocala cara, (dark) Peterborough, Ontario, August 25, 2004, Tim Dyson copyright
Henry (left-click on the frog) to find more