Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

Autumnal Moth
Epirrita autumnata (Borkhausen, 1794)

Family: Geometridae
Subfamily: Larentiinae
Identification: forewing pale gray or whitish, crossed by two darker bands of connected semicircles or scalloped loops (bands sometimes pale, showing little contrast against ground color); terminal line a series of dark DOUBLE dots -- a distinctive feature; lacks dull yellowish scaling along costa; hindwing paler, "washed out", lines less distinct, but terminal line usually visible as a series of dark double dots
Wing Span: 2.5-3.6 cm
Life History:
Flight: September and October
Caterpillar Hosts: a variety of conifers as well as alder, willow, birch, and poplar
Adult Food:
Habitat: coniferous and mixed woods; treed flood plains containing alder and willow
Range: coast to coast in southern Canada and northern United States, south in the west to California also occurs throughout Eurasia
Management Needs:

Pollinator Week was June 20-26, 2022!

Butterflies and moths are accidental pollinators of many flowering plants. While most species do not have special structures to carry pollen, they do brush against pollen and transfer it to other flowers.

Did you know? The Eastern Tailed-Blue (Cupido comyntas) flies close to the ground and uses its short proboscis to probe flowers of wild strawberry, white sweet clover, and other low-lying plants.