Sighting for June 14, 2020
David H. Bartholomew
San Bruno Mountain, Ridge Trail
San Mateo County, CA
- Pipevine Swallowtail 1
- Anise Swallowtail 24
- Pale Swallowtail 4
- Gray Hairstreak 1
- Acmon Blue 1
- Callippe Fritillary 42
- American Lady 2
- Mournful Duskywing 5
- Common Checkered-Skipper 1
Callippe Fritillary
Callippe Fritillary
Mournful Duskywing
Pale Swallowtail
Callippe Fritillary
Anise Swallowtail
American Lady
San Bruno Mountain is home to 4 federally endangered butterflies, of which one was observed today along the Ridge Trail. One species, that is, 42 individual San Bruno Silverspots (Callippe Fritillaries).
San Francisco weather conditions (drizzly fog and strong cold winds off the ocean), kept some butterflies expected under better conditions to wait for a better day. Can’t complain, nice to see those fritillaries.