Montana Field Guide

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Montana Field Guides

Home - Other Field Guides
- Kingdom - Animals - Animalia
  - Phylum - Spiders, Insects, and Crustaceans - Arthropoda
    - Class - Insects - Insecta
      - Order - Butterflies / Moths - Lepidoptera
        
        Family - Owlet Moths / Miller Moths - Noctuidae
        
        Species - Bruce's Swordgrass Moth - Xylena brucei

Bruce's Swordgrass Moth - Xylena brucei

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Native Species

Global Rank: GNR
State Rank: SNR

Agency Status
USFWS:
USFS:
BLM:

External Links

General Description

The Xylena brucei forewing is gray with large discal spots (USGS 2006).

Diagnostic Characteristics

The Xylena thoracica moth is similar to X. brucei, but the thoracica forewing has a small yellow subapical streak (USGS 2006).

Observations in Montana Natural Heritage Program Database

Number of Observations: 15

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Relative Density

Recency

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

Habitat

X. brucei occurs in ponderosa pine forests (USGS 2006).

Stewardship Responsibility

References

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Ferns and allies

Conifers

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Citation for data on this website:
Bruce's Swordgrass Moth — Xylena brucei. Montana Field Guide. Montana Natural Heritage Program. Retrieved on April 8, 2025, from https://FieldGuide.mt.gov/speciesDetail.aspx?elcode=IILEYFA050