Size
Wingspan 70-98 mm; male considerably smaller than female
Identification
Adult: forewing speckled gray with black zigzag PM and ST lines that sometimes touch; reniform spot represented by a black discal dot; AM line black, jagged, but does not touch reniform spot; hindwing white with diffuse dark median line, black discal spot, and varying amounts of pink at base and along inner margin
Season
Adults fly from July to September
Food
Larvae feed on the leaves ("needles") of various species of pine (Pinus). Particular host records include: Ponderosa pine (Pinus ponderosa), Jeffrey pine (P. jeffreyi), lodgepole pine (P. contorta), sugar pine (P. lambertiana), pinyon pine (P. edulis), and Coulter pine (P. coulteri).
Adults do not feed.
Life Cycle
Two years are required to complete development. Second- or third-stage caterpillars overwinter the first year in tight clusters, resume feeding in the spring, pupate in June or July, and spend the second winter in underground pupation chambers lined with silk and plant litter. Some can remain in the pupal stage for up to 5 years before emerging as adults.
[copied from text at butterfliesandmoths.org]
Remarks
Larvae are prepared and eaten by Paiute natives in California. For more info, see the
brief account at Wikipedia, or more detailed journal articles like
Aboriginal Exploitation of Pandora Moth Larvae in East-Central California or
Harvesting Pandora Moth Larvae with the Owens Valley Paiute.
See Also
Lusk's Pine Moth (
Coloradia luski) forewing has AM line that touches reniform spot (
compare images of both species by Jim Vargo at MPG)