Here is a pretty bug I haven’t been able to identify. When it flys you can see that the body is a metallic blue, and the wings look black. Unfortunately, they were a bit shy so I wasn’t able to get a very good picture. This was taken in the hills along the Southern California coast. They are quite common for a short period each year.
This is a moth known as the California Ctenucha, Ctenucha multifaria.