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Scientific Name Pero occidentalis Common Name Western Pero Habitat Open montane woodlands. Seasonality Adults fly in Alberta throughout June. Identification Very similar to P. honestaria and behrensaria, but according to McGuffin (1987) this is the only Canadian Pero with slightly dentate or pectinate rather than simple male antennae. Life History

Caterpillars are light grey and brown with several short tubercles, and mimic twigs in posture and colouration. The pupa overwinters. The eggs are laid in a neat row along the host foliage, as in other Pero species …

Caterpillars are light grey and brown with several short tubercles, and mimic twigs in posture and colouration. The pupa overwinters. The eggs are laid in a neat row along the host foliage, as in other Pero species (McGuffin 1987).

Read More + Conservation Not of concern. Diet Info

Miller & Hamond (2000) state that larvae feed primarily on pines and other conifers, But this species was not recorded from conifers by Prentice (1963), and McGuffin (9187) lists only lodgepole pine (Pinus contorta)…

Miller & Hamond (2000) state that larvae feed primarily on pines and other conifers, But this species was not recorded from conifers by Prentice (1963), and McGuffin (9187) lists only lodgepole pine (Pinus contorta) along with deciduous shrubs (Menziesia glabella, Sheperdia canadensis, and Ceanothus).

Read More + Range Southern BC and the AB mountains (south of the Athabasca River) south to CA (McGuffin 1987).