Sighting for April 2, 2021

David H. Bartholomew

San Bruno Mountain, State and County Park
San Mateo County, CA

With David Rawlinson, Sarab Seth, and Nancy Asquith. Unusually warm (high 70’s), and calm (no wind coming in off the ocean). We had the good fortune to find three of the four federally protected butterflies which occur at SBM: San Bruno Elfin, Bay Checkerspot, and Mission Blue.

  • Anise Swallowtail 12
  • Cabbage White 1
  • Bramble Hairstreak
  • Brown Elfin 10
  • Moss' Elfin 16
  • Gray Hairstreak 1
  • Spring Azure 28
  • Boisduval's Blue 12
  • Variable Checkerspot 14
  • Edith's Checkerspot 4
  • California Tortoiseshell 4
  • West Coast Lady 1
  • Red Admiral 1
  • Mournful Duskywing 4
  • Common Checkered-Skipper 2

Edith's Checkerspot

Boisduval's Blue

Edith's Checkerspot