First county record for me.
Checkerspot of some kind, mixed oak woodland and grassland, under oaks. Sorry for the bad pics, it was shy
No orange present, but some small tingeing of tan at the lower outer edges. Otherwise primarily dusky black and white. Possible Callippe fritillary but unsure.
I'll gladly receive correction on this ID.
Butterfly foraging on Coyote Mint flower in area that was heavily burned in August 2020 River Fire. Toyon Trail in Toro Park.