White-marked Tussock Moth
Unknown caterpillar found cruising around the yard. There were dozens of these for a while and then all gone. Never got to see what they turn into…
[Update] Looks like this might be a Orgyia leucostigma or White-marked Tussock Moth. Though they are supposed to not go farther west than Texas, I did find this one in Topanga, California. Maybe a cousin?