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Species Pero occidentalis - Western Pero - Hodges#6761

Pero of some kind? - Pero occidentalis Pero sp. larva - Pero occidentalis Pero sp. larva 9 days later - Pero occidentalis Pero occidentalis Arizona Moth - Pero occidentalis Western Pero - Pero occidentalis Western Pero - Pero occidentalis Pero occidentalis
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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
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
Wingspan: ♂ 35-40 mm, ♀ 33-37 mm. (1)
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)
Ranges widely in the west. From British Columbia and Alberta, south to Colorado and New Mexico, west to the Pacific Coast. (1), (2)
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.