Northern Prairie Wildlife Research Center
Atlas of North Dakota Butterflies
Compton Tortoise Shell (Nymphalis vaualbum)
- BND: Compton Tortoise Shell; Nymphalis vaualbum ([Denis & Schiffermüller], 1775)
- BNA: Compton Tortoiseshell; Nymphalis vaualbum
- NDC: NYVA
- Habitat: Mature forests; adults drink sap and rotting fruit juices
- Larval food: Populus, Betula, Salix spp.
- Adult flight: Overwinters as adult, appearing April-May to produce a single annual brood by early July. The species is episodic and somewhat migratory, being rare for several years, then suddenly common.
- References: Royer 144, Layberry et al. 202, Opler & Krizek 155, Scott 290
Explanation of Textual Accounts
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