Bee-watching is a wonderful distraction from the stresses of life. I can definitely recommend it for a warm, sunny afternoon as spring turns to summer.
Bumblebees seem to love California poppies. Most of them are black with yellow heads and a nifty yellow stripe across the bum. There are also some fuzzy-looking yellow-brown ones, but I didn’t get any pictures of them. (Taking decent pictures of bees is hard).
Honeybees favour the lavender almost exclusively. (And being smaller and a subdued orange-brown colour, they don’t show up well).
Note: bee-watching is not relaxing when the watcher is trying to take pictures of the bees. For best results, leave the camera/phone in the house!