Status:  fairly common resident

Flights:  1, Apr-Jun

Distribution/known sites in Monterey County:  coastal and interior ranges away from coast; Arroyo Seco, Chalone Pks.,  Hare Cyn., upper Carmel Valley Rd..

Habitats:  scrub and chaparral on hilly, rocky terrain

Host plants: wild buckwheats (Eriogonum), esp. fasciculate buckwheat (E. fasciculatum)

Adult foodflower nectar, esp. Eriogonum species

Conservation: some ssp. may be of concern; El Segundo blue (s. CA) is endangered


  1.   aka square-spotted (Bernardino) blue, E. battoides

  2.   adults roost on buckwheat

  3.   male blue above with narrow black outer margin, no orange band; fem. above brown, orange submarginal band on HW


Bernardino blue Euphilotes bernardino

Life history facts

egg: laid singly on host plant flowers

larva: eat flowers and fruits, tended by ants

pupa: hibernate in sand or leaf litter

adult:  males patrol all day near host for receptive females

mating pair

n chalone peak