Status:  uncommon resident

Flights:  1, May-Jul

Distribution/known sites in Monterey County:  not well known; Tassajara/Jamesburg Rds., Salinas R. south of Bradley

Habitats:  riparian willows in foothills, mtn. canyons

Host plants: willows; S. s. dryope on sandbar willow

Adult foodflower nectar - milkweed, sweet clover, everlasting, thistles

Conservation: none needed


  1.   recent MCO records are tail-less subspecies S. s. dryope (dryope hairstreak)

  2.   adults rest on willows, nearby flowers

  3.   female above with yellowish tinge; some tail-less


Sylvan hairstreak Satyrium sylvinus

Life history facts

egg: laid singly on stems of host plant, hibernate until spring

larva: eat leaves


adult:  males perch on low vegetation near host plants to watch for females

upper carmel valley rd