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Digital Guide to Moth Identification

Erebidae 930335 – 8129   Pyrrharctia isabella (Smith, 1797)              Isabella Tiger Moth

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Larva and Host Plants: Host familiy: Amaranthaceae[Chenopodiaceae] Araceae Apocynaceae[Asclepiadaceae] Asteraceae Betulaceae Adoxaceae[Caprifoliaceae] Caryophyllaceae Clethraceae Cucurbitaceae Euphorbiaceae Fabaceae Grossulariaceae Malva..  Host genera: Acer Arctium Asclepias Aster[unresolved] Atropa Beta Betula Clethra Cucumis Dianthus Elymus[=Elytrigia] Fragaria Gossypium Helianthus Lactuca Melilotus Parthenocissus Persicaria[=Polygonum] Phaseolus ...  Notes: grasses & various broad-leaved herbs & woody plants in many plant families (Powell & Opler 2009); wide variety of herbaceous vegetation (Crabo et al 2014).  (Shropshire & Douglas 2025) Similar Species: Pinned specimens of related species. (Hint: select View by Region on the related species page.) Synonymy: isabella (Smith, 1797) (Phalaena) - MONA 1983: 8129 californica Packard, 1864 (Pyrrharctia)

References (Caution: DNA barcoding at BOLD provides evidence of relatedness, not proof of identification; some BOLD specimens shown may not be sequenced.)

Barcode of Life (BOLD) - Caution: Identifications often erroneous; DNA barcode provides evidence of relatedness, not proof of identification; many specimens not sequenced. Hall et al., 2021. The Moths of North Carolina - website (identification, habitats and life history) Powell, J. A. & P. A. Opler, 2009. Moths of Western North America, Pl. 47.18f; p. 269. Book Review and ordering Shropshire, K.J. & 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; Suppl. 1. (PDF or read online) Species Page at Block Island Moths Species Page at BugGuide.Net Species Page at E. H. Strickland Museum Species Page at Mass Moths Species Page at Pacific Northwest Moths Species Page at iNaturalist Species page at Moths of North Dakota.

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