Bombus californicus in the ceanothus

The ceanothus is abuzz all day, and now the California bees Bombus californicus are out after their winter rest, as well.

Look at the pollen baskets on this bee!

The same bee, upside down.

I wonder if these are nesting underground or in the tufts of native grasses that are growing nearby in our native patch.

Another California bumble bee approaching a flower head on the Ray Hartman ceanothus shrub.

These bumble bees are very quick, darting around with sudden movements.