- Cylindrical body
- Uniform charcoal brown colour
- Pale white throat
- Long slender wings
- Short, bristly tail
Males and females are not distinguishable by plumage.
Chimney Swifts make a constant, high-pitched twittering sound. The video below shows Swifts in the process of roosting; roosts may contain hundreds or thousands of birds. Skip to 0:55 to see an interior view of the chimney.