Update on the 'lbb' or little brown birds raising a brood in the bluebird box. The breakthrough came while browsing our local native plant nursery website (www.laspilitas.com). Since they cater to creating natural settings in landscaping, their site suggests plant types to lure birds and butterflies and has a nice section on local birds. There near the bottom - a photo matching the squatters, House Wren (Troglodytes aedon). Just about the same size as most of the hummingbirds and about as energetic. With just a quick glance, they could be mistaken for a mouse as a frequent behavior is running along the ground and hopping between low branches of shrubs in search of insects. Here is one of the parents coming out after dropping off a bug.
I am only seeing Anna's and Blackchin hummingbirds at the moment, they seem to be more resident. The Rufus and Caliope hummers are more migratory and thus have passed through heading north. They should be back toward the end of summer on their way south.
The orioles still the loud ones on the block, flying between the tops of the avocado trees next door and the pepper trees and the feeders. They are, as expected, very fond of the grape jelly in the converted feeder. Last year the orioles were few and far between by September so they should be hanging around for 3-4 more months before heading south and east.