Bushtit

Late Spring and early Summer has been interesting as there are a lot of young, immature birds. Many times they look different than fully mature birds I commonly see. For example, I took some pictures of a bird I was nearly convinced was a Orange-crowned Warbler until I realized that they were immature Common Yellowthroats.
The bird above did not fool me however as this immature Bushtit looks very much like a fully mature bird. I saw it a tree that was full of Bushtits. This one and another near it were behaving differently as they were quite sleepy and not flighty at all. The clincher for me though was the soft, yellowish corners of its beak. This is the remnants of the softer beak of a nesting bird.