North American Butterfly Association
San Bruno Mountain, State and County Park
San Mateo County, CA
With David Rawlinson, John Hibbard, Sarab Seth, and Tom Peterson. Reasonably nice weather but a bit breezy. Just a few butterflies seen, unfortunately no San Bruno Elfins, our hoped-for species.
22 Checkerspot caterpillars seen, probably all chalcedona. Also, 2 hilltopping Blues not stopping for ID.
Variable Checkerspot caterpillar
West Coast Lady
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