Common Name: Sigmoid Prominent
Clostera albosigma Fitch, 1855
(R. Bercha, det.)
Wingspan: 28 - 38 mm
Habitat: Wooded areas
Time of year seen: May
Caterpillar's Diet: Poplar, aspen and willow
Other: A common moth that
is attracted to light at night. It is found across Canada from
Vancouver Island to Newfoundland. There are two generations per year.
The moths are greyish to brown with the outer forewing marked by a red
brown to dark brown patch and separated at the
by a distinct white "sigma" shaped line. The earlier spring generation
is lighter in color and has four whitish lines on its forewings. The
second summer generation is darker and more uniformly colored (see photo).
The caterpillars are solitary feeders that fold themselves into leaves.
(Covell, 1984 & Powell et al, 2009)