Ectropis crepuscularia
Ectropis crepuscularia  (The Small Engrailed)

Field Marks

Note the upside-down M-shaped mark on the FW. There are two black spots above it, sort of shaped like a bow-tie. Sometimes this mark is also present on the HW. The color of the wings and the boldness of the lines is are extremely variable in the species.


This species is extremely common and widespread, and is one of the moths you can count on finding every year at almost any location, though rarely in huge numbers.


Distribution pattern: Transcontinental.

Ectropis crepuscularia
McGuffin 1977
Cornell University
Reilly pers obs
Forbes 1948

Life History

Reported as a forest defoliator in Canada (McGuffin 1977).

Host Plants

alder, apple, birch, elm, hemlock, willow, maple, oak, poplar, etc

Similar Species

Melanolophia canadaria


McGuffin WC. 1977. Guide to the Geometridae of Canada (Lepidoptera) II. Subfamily Ennominae. 2. Memoirs of the Entomological Society of Canada 101: 1-125.

Forbes WTM. 1948. Lepidoptera of New York and neighboring states: part II. Cornell University Agricultural Experiment Station memoir 274.

Covell CV. 1984. A field guide to the moths of Eastern North America. Houghton Mifflin Company: Boston. 496 pp.