Viola-dependent
Guides
Speyeria egleis
Great Basin fritillary, egleis fritillary
Speyeria egleis is a medium-sized fritillary butterfly native to western North America. Adults are active from late June through August and inhabit mountain meadows, forest openings, and exposed rocky ridges. The species exhibits strong fidelity to Viola species as larval host plants. Multiple subspecies have been described across its range, reflecting geographic variation in morphology and distribution.