Microhabitats of postdiapause larvae of Euphydryas editha quino (Behr) were found to differ from random habitat points in percentage cover, grass, shade, shrub, and host plant (Plantago erecta E. Morris). Abundant host plant and little shade or overstory cover characterized larval microhabitat. Larvae found in shrub versus more open habitats occupied similar microhabitats but were significantly smaller, presumably because of delayed diapause break. Larval use of coastal sage scrub, when shrubs have been removed by disturbance (grading of dirt roads), suggests that some degree of intermediate disturbance resulting in removal of shrub canopy and increased insolation may benefit populations of this endangered insect.
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Vol. 93 • No. 1