Sighting for June 14, 2020

David H. Bartholomew

San Bruno Mountain, Ridge Trail
San Mateo County, CA

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.

  • 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