I think I have this ID correct (just learning about it). This (and more) was on a young California Buckeye. About 3" diameter.
About 2.5" long.
Under old log. I'm pretty sure those are eggs beneath the bottom one. So cool!
Doing some insect hunting.
Flower buds just starting.
2 Males & 1 Female in this area.
Found on it's back/dead on path. Noted an injury on it's head when I turned it over. About 6" long.
Counted 74 of them (flying over house, south to north) in 15 minutes. Sorry about the fuzzy photos.
1 adult with 4 owlets. (Over 5 years of observing, these parents only had 2 or 3 owlets each season, so this was a big year.)
Hen and one of her 10 poults. (Fun to hold the little one, but mom was not amused.)
male flowers and first leaf.