Montana Field Guide

The Transparent Quaker Moth (Orthosia transparens) wingspan is about 37 mm. The forewing is falcate, light red to dark red-brown with a black reniform spot. The hindwing is dark gray to black. The males have filiform antennae (USGS 2006).

Shropshire and Tallamy (2025) provide a list, with synonymies, of 13,055 described native, exotic, and occasional straying Lepidoptera species of North America, north of Mexico; known but undescribed taxa, taxa with unresolved taxonomy, and excluded species are also included. The main manuscript includes links to supplementary materials, including a reference list for Lepidoptera of North America north of Mexico, and a filterable spreadsheet with information on taxonomy, synonymy, size ranges of species, distribution by state, province, and country with references, and host-plant Family and Genus associations with references.

The Transparent Quaker Moth flies in early spring (USGS 2006).

Shropshire and Tallamy (2025) provide a link to a supplemental filterable spreadsheet with information on host-plant Family and Genus associations with references for all Lepidoptera species of North America, north of Mexico.

Larvae feed on the foliage of madrone (Arbutus menziesii) and Rhododendron (USGS 2006).