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Species Ennomos subsignaria - Elm Spanworm - Hodges#6798

geometer caterpillar - Ennomos subsignaria Moth - Ennomos subsignaria Snowy Geometer Moth - Ennomos subsignaria 8015367 - Ennomos subsignaria Geometridae, looking beautiful - Ennomos subsignaria - male moth - Ennomos subsignaria Ennomos subsignaria geometrid 3 - Ennomos subsignaria
Show images of: caterpillars · adults · both
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Lepidoptera (Butterflies and Moths)
Superfamily Geometroidea (Geometrid and Swallowtail Moths)
Family Geometridae (Geometrid Moths)
Subfamily Ennominae
Tribe Ennomini
Genus Ennomos
Species subsignaria (Elm Spanworm - Hodges#6798)
Hodges Number
wingspan in the 35-40 mm range, based on CBIF image
"Pure white except for yellow branches on bipectinate antennae. Easily separated from other all-white species by angled outer margin of FW."
[description by Charles Covell (1)]
from Texas to Alberta and east to the Atlantic
adults fly in July and August, earlier (late April-June) in Texas and southern states
larvae present from May to July
larvae feed on elm, apple, birch, maple, and oak
Life Cycle
one generation a year
See Also
Eugonobapta nivosaria - Snowy Geometer - Hodges#6965
Shape of forewing is different.
Internet References
live adult images (Lynn Scott, Ontario)
adult images (Larry Line, Maryland)
several images and biology info (Pennsylvania State U.)
live larva image and other info (US Geological Survey)
live larva image (
common name reference and other info (Ohio State U.)
Works Cited
1.Field Guide to Moths of Eastern North America
Charles V. Covell, Jr. 2005.