
	Description
	Chestnut-marked pondweed moth is a small aquatic crambid moth. It occurs in northern United States from the East Coast to Minnesota and Iowa, and in adjacent Canadian provinces. Adults are found from May to September around ponds and lake shores with emergent aquatic plants and in marshes. Larvae are aquatic and feed on pondweed. Adults are 5⁄16″ to ½″ (8 to 12 mm) long and have a wingspan of about ¾″ (20 mm). The wings broad and are held spread out when at rest. They are white with bold black bands and a golden-yellow marginal band.

	Size
	Total length: 5⁄16″ to ½″ (8 to 12 mm) Wingspan: about ¾″ (20 mm)

	Similar Species



	Habitat
	Marshes, ponds, and lake shores


	Biology
	Season
	May to September

	Behavior
	Adults will come to light. The wings are held spread out when at rest.

	Life Cycle


	Larva Hosts
	Pondweed (Potamogeton spp.)

	Adult Food


	Taxonomy
	Order	Lepidoptera (butterflies and moths)
	Superfamily	Pyraloidea (pyralid and crambid snout moths)
	Family	Crambidae (crambid snout moths)
	Subfamily	Acentropinae (aquatic crambids)
	Tribe	Nymphulini
	Genus	Parapoynx

	Synonyms
	Cymoriza badiusalis Nymphula badiusalis Parapoynx albalis

	Common Names
	chestnut-marked pondweed moth


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	Taylor Wirkus




	Scott Bemman





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	Chestnut-marked Pondweed Moth (Crambidae: Parapoynx badinsalis) Carl Barrentine

	About Jun 26, 2010 Photographed at the Rydell NWR, Minnesota (25 June 2010). Thank you to John and Jane Balaban (@Bugguide.net) for identifying this moth!



	Chestnut-marked Pondweed Moth (Crambidae: Parapoynx badinsalis) Carl Barrentine

	About Jul 29, 2010 A common small moth found on the refuge this time of year. Photographed at the Rydell NWR, Minnesota (28 July 2010). Thank you to John and Jane Balaban (@ Bugguide.net) for identifying this specimen!

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Taylor Wirkus 8/13/2021	Location: Sparta, WI



Scott Bemman Summer 2020	Location: Hayes Lake State Park



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Created: 9/12/2020

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chestnut-marked pondweed moth