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Montana Field Guide

Montana Field Guides

Police Car Moth - Gnophaela vermiculata


Global Rank: G5
State Rank: SNR

Agency Status
USFWS:
USFS:
BLM:


 

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General Description
The adult Police Car Moth (Gnophaela vermiculata) is all black except for large white spots on wings. The wings have white patches outlined by black veins on a black background. The wingspan is about 54 mm. Although there are a number of similar-looking species in the genus, this is the only species that occurs in Montana. The large size, black and white pattern in combination with the elongate wings and diurnal activity are unique to this species in Montana. The larvae are yellow with uniformly-distributed patches of black hairs that partly obscure the yellow ground color (Coin 2004).

Diagnostic Characteristics
Langton's Forester (Alypia langtoni) is smaller with black wings with white patches, and the larvae feed on foliage of Epilobium (fireweed) (USGS no date).

Range Comments
The Police Car Moth is common and widely distributed at mid elevations among the mountain ranges of western North America. It ranges from western Manitoba then west to British Columbia, and south to Utah and Colorado (Coin 2004).

Summary of Observations Submitted for Montana
Number of Observations: 6

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Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
The Police Car Moth occurs in open, wooded areas of the foothills and boreal forest (Schmidt and Robinson no date).

Food Habits
The larvae feed on the foliage and flowers of Mertensia (bluebells). Adults nectar sources such as Cirsium (thistle) and Solidago species (goldenrod) (Coin 2004).

References
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Citation for data on this website:
Police Car Moth — Gnophaela vermiculata.  Montana Field Guide.  .  Retrieved on , from