Bushtits are very small birds, about the size of a hummingbird. They live pretty much only in the western United States and do not migrate. They tend to eat insects, but also a few seeds, too. They also like suet.
Bushtits are often on the move and never sit still, making them hard to photograph sometimes. They often travel in groups of 25 or more, twittering away. They are known for hanging upside down to look for spiders and other treats.
Bushtits make a nest that is similar to a gnatcatcher nest which is a long, hanging nest made of grasses and other material. They hang these nest in shrubs and low trees. They generally only raise one or two at a time. Their preferred environment are areas where water is readily available with low brush and trees that they can float to and from.
Their main enemies are birds like kestrels and roadrunners. Plus, many predators eat their eggs and young including skunks and raccoons.