Conservation Status
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Uncommon. Probably of no concern.
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Cyclicity
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May.
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Distribution
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Newfoundland and Maine west to Alberta, the Northwest Territories and Yukon (Munroe 1976). Type Locality St. Martin's Falls, Albany River, Ontario, as Scopula marginalis. In Alberta, reported from Areas 8 (Red Deer), 10 (Edmonton, Wabamun) and 20 (Nordegg) by Bowman (1951) as Pyrausta marginalis.
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General Description
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Wingspread 15-17 mm. A small, dark brown, short-winged moth with a white PM line on both dorsal fore and hind wings, and a robust body. Similar to Loxostege ephippialis but the latter lacks the white PM lines and instead has a large, dark, wedge-shaped area in the center of the dorsal fore wings.
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Habitat
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The moths frequent boggy and marsh places, where they fly rapidly close to the ground, often in bright sunlight (Munroe 1976).
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Life Cycle
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Unknown. The short wings, robust body, dark color and reduced eyes are adaptations to a day-flying habit (Munroe 1976).
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Trophic Strategy
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The larvae should be looked for on species of Rumex and Polygonum growing in wet places Munroe (1976).
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Ostrinia marginalis
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Ostrinia marginalis: Brief Summary
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Ostrinia marginalis is a moth in the family Crambidae. It was described by Francis Walker in 1866. It is found in North America, where it has been recorded from Newfoundland and Maine west to Alberta, the Northwest Territories and Yukon. The habitat consists of bogs and marshes.
The wingspan is 15–17 mm. The forewings and hindwings are dark brown with a white postmedial line.
The larvae feed on Rumex and Polygonum species.
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