Scientific name: Psaltriparus minimus
The Bushtit is a small, social resident of oak-pine forests and coastal shrub in the western U.S. Bushtits make some altitudinal movements, but are generally nonmigratory. They typically occur in flocks of up to several dozen birds.
Small animals have a larger surface area in relation to their body size, and so they are more vulnerable to cold weather. During cold weather, Bushtits tend to perch much closer together to share each other’s heat.