Montana Field Guide

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Montana Field Guides

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- Kingdom - Animals - Animalia
  - Phylum - Spiders, Insects, and Crustaceans - Arthropoda
    - Class - Insects - Insecta
      - Order - Butterflies / Moths - Lepidoptera
        
        Family - Looper Moths - Geometridae
        
        Species - Behr's Pero Moth - Pero behrensaria

Behr's Pero Moth - Pero behrensaria

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Native Species

Global Rank: G5
State Rank: SNR

Agency Status
USFWS:
USFS:
BLM:

General Description

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Species Range

Montana Range Range Descriptions

Native

Observations in Montana Natural Heritage Program Database

Number of Observations: 55

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Relative Density

Recency

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

Stewardship Responsibility

References

Additional ReferencesLegend: View Online Publication
Do you know of a citation we're missing?
- Rindge, F.H. 1955. A revision of some species of Pero from the western United States (Lepidoptera, Geometridae). American Museum Novitates. Number 1750. 33pp.
- Shropshire, K.J. and D.W. Tallamy. 2025. Lepidoptera of North America, north of Mexico: an annotated list containing geographic ranges and host-plant records. Zookeys.1261:101-113.
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Dragonflies / Damselflies

Ferns and allies

Conifers

Flowering Plants (Dicots)

Flowering Plants (Monocots)

Citation for data on this website:
Behr's Pero Moth — Pero behrensaria. Montana Field Guide. Montana Natural Heritage Program. Retrieved on February 18, 2026, from https://FieldGuide.mt.gov/speciesDetail.aspx?elcode=IILEU2K140