Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Calendar
Upcoming Events

Interested in a 2022 BugGuide gathering in New Mexico?

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

National Moth Week 2020 photos of insects and people.

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Discussion, insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Previous events


TaxonomyBrowse
Info
ImagesLinksBooksData

Species Pero occidentalis - Western Pero - Hodges#6761

Pero of some kind? - Pero occidentalis Pero of some kind? - Pero occidentalis Moth - Pero occidentalis Pero sp. larva 13 days later - Pero occidentalis Pero sp. larva 4 days later - Pero occidentalis Pero sp. larva 9 days later - Pero occidentalis Pero occidentalis Pero occidentalis
Show images of: caterpillars · adults · both
Classification
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 Azelinini
Genus Pero
Species occidentalis (Western Pero - Hodges#6761)
Hodges Number
6761
Synonyms and other taxonomic changes
Pero occidentalis (Hulst, 1896)
Marmarea occidentalis Hulst, 1896
Pero occidentalis packardi Cassino & Swett, 1922 (1)
Pero occidentalis canaster Rindge, 1955 (1)
Pero occidentalis helvus Rindge, 1955 (1)
Pero occidentalis peplarioides Hulst, 1898 (1)
* phylogentic sequence #199375
Size
Wingspan: ♂ 35-40 mm, ♀ 33-37 mm. (1)
Identification
Larva - light grey and brown, mimic twigs in posture and coloration.

Adult - highly variable. See Rindge in Print References for description of this species and several subspecies. (1)
Range
Ranges widely in the west. From British Columbia and Alberta, south to Colorado and New Mexico, west to the Pacific Coast. (1), (2)
Food
McGuffin (1987) lists lodgepole pine (Pinus contorta) along with deciduous shrubs Menziesia glabella, Sheperdia canadensis, and Ceanothus.
See Also
Pero honestaria
Pero behrensaria
Print References
Grossbeck, J.A. 1911. Studies of the North American geometrid moths of the genus Pero. Proc. USNM 38: 370-371
Powell, J.A. & P.A. Opler 2009. Moths of Western North America. University of California Press. pl.29.18m, p.214 (3)
Rindge, F.H. 1955. A revision of some species of Pero from the western United States (Lepidoptera, Geometridae). American Museum Novitates 1750: 1-33 (PDF) (1)
Internet References
Works Cited
1.A revision of some species of Pero from the western United States (Lepidoptera, Geometridae).
Frederick. H. Rindge. 1955. American Museum Novitates 1750: 1-33.
2.North American Moth Photographers Group
3.Moths of Western North America
Powell and Opler. 2009. UC Press.