Compton Tortoiseshell (Nymphalis vaualbum) is an attractive nymphalid species, related to the more familiar Mourning Cloak. This butterfly is ranked as S1 (highly-state-rare) in Maryland, and is considered endangered. The flight time ranges from April to October (Butterflies of Maryland: A Biological Summary and Checklist by Lynn Davidson & Richard Smith). This species hibernates as an adult, and butterflies may be seen in the first spell of warm weather in spring. Compton Tortoiseshell also ranges through Europe and Asia.
Compton Tortoiseshell uses birches, willows, or aspens as larval hosts (Allen 1997).
There are 23 records in the project database.
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