Some kind of caterpillar or other type of larva found on a creeping manzanita bush.
Not used to seeing Gray Hairstreaks with open wings but 2nd shot seems to confirm this to be a gray hairstreak
San Diego County, California, US
An American Copper at Allens Pond Wildlife Sanctuary.
Lycaenidae is the second-largest family of butterflies (behind the Brush-footed butterflies), with over 5,000 species worldwide, whose members are also called gossamer-winged butterflies. They constitute about 40% of the known butterfly species.