typical blues

tribe Polyommatini

Member of blues (subfamily Polyommatinae)
gossamer-winged butterflies (family Lycaenidae)
butterflies (superfamily Papilionoidea)
butterflies and moths (order Lepidoptera)
insects (class Insecta)
hexapods (subphylum Hexapoda)
arthropods (phylum Arthropoda)
animals (kingdom Animalia)

A key to the blues of Washington State includes many bay area species.

echo azure
Celastrina echo

genus Icaricia

silvery blue
Glaucopsyche lygdamus

western pygmy-blue
Brephidium exilis

sonoran blue
Philotes sonorensis

dotted blue
Euphilotes enoptes

western tailed-blue
Cupido amyntula

eastern tailed-blue
Cupido comyntas

3 observed taxons / 7 unobserved taxons / 1 key

Chris’s observations: 20 (16 are research grade)

Locations:

Pleasanton Ridge RP: 3
Russian Ridge OSP: 3
Coyote Valley OSP: 2
Almaden Quicksilver CP
Calero CP
Ed R. Levin CP
Edgewood Park & Natural Preserve
Henry Coe SP
Joseph D. Grant CP
La Honda Creek OSP
Purisima Creek Redwoods OSP
Sam McDonald CP
San Pedro Valley CP
Santa Teresa CP
Sweeney Ridge National Recreation Area

Months:

Jan.: 2
Feb.: 1
Mar.: 5
Apr.: 3
May: 1
Jun.: 4
Jul.: 3
Aug.: 1

For more details, use advanced search.

Not all sites agree about the scientific name:

tribe Polyommatini → iNaturalist
subfamily Polyommatinae → BugGuide

Bay Area species: iNaturalist