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Montana Field Guide

Montana Field Guides

A Noctuid Moth - Xestia mustelina

Native Species

Global Rank: GNR
State Rank: SNR

Agency Status


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General Description
The forewing of Xestia mustelina is pink-gray with very large gray discal spots outlined in black. The wingspan is about 36 mm (USGS 2006). The hindwings are pale smoky brown (Davis 2007).

Adults fly mainly from mid-July to September (Davis 2007).

Range Comments
The X. mustelina occurs in the Pacific Northwest from British Columbia south to California (Davis 2007).

Observations in Montana Natural Heritage Program Database
Number of Observations: 1

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



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

X. mustelina is common and widely distributed in wet conifer forests in the Pacific West and in the northern Rocky Mountains (USGS 2006).

Food Habits
The larvae feed on the foliage of species of Pinaceae, in particular Douglas-fir (Pseudotsuga menziesii) and western hemlock (Tsuga heterophylla) and flowering trees and shrubs such as madrone (Arbutus menziesii), myrica (Myrica), and huckleberry (Vaccinium) (USGS 2006).

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Citation for data on this website:
A Noctuid Moth — Xestia mustelina.  Montana Field Guide.  .  Retrieved on , from