This species has the common names "Sleepy Underwing" or "Pink Underwing", much more "socially acceptable" than a literal translation of the scientific name.
The Catocala have a fascinating history of assigned scientific names. Read Classification and Common Names. Use your browser "Back" button to return to this page.
The unchecked, wide, white hindwing fringe, limited markings on pale-gray forewings markings, brown thoracic collar and smaller size distinguish this species from Catocala cara.
C. cara has hindwing fringe that is heavily checked along the wing veins and has a dull-purple tinge to much darker and larger forewings. The thoracic collar tends to be darker.
Catocala cara, Peterborough, Ontario, August 19, 2004, Tim Dyson copyright
The differences are readily apparent when one sees the two species side by side.
Catocala cara (left), Catocala concumbens (right)
August 27, 2004, Tim Dyson copyright
Catocala concumbens, Peterborough, Ontario,
August 15, 2004, courtesy of Tim Dyson copyright.
Even in flight, the white fringe is in startling contrast to the pink and black banding of the hindwing. Eyes are "aglow", reflecting any light.
Catocala concumbens, Peterborough, Ontario, August 20, 2004, courtesy of Tim Dyson.copyright.
I have not observed this moth to be a strong flier. Perhaps that or the quiet forewing shades of gray is how it got its common name of "Sleepy Underwing".
Although Catocala concumbens is easily recognized, even
with its forewings concealing the flashy pink underwings, there are
some species whose underwing characters help to distinguish them
from other species.
Henry (left-click on the frog) to find more