andorinhão-peregrino vs andorinhão-de-rabo-curto

The Chimney Swift and Short-tailed Swift can be tricky to differentiate, but key differences lie in their tail length and plumage patterns. The Chimney Swift has a longer, more tapered tail compared to the noticeably short tail of the Short-tailed Swift.

Focus on tail length: Chimney Swifts have a longer, more tapered tail, whereas Short-tailed Swifts have a distinctly short tail. In flight, observe the overall silhouette and tail shape for a quick identification.

Chimney Swifts have a more uniform dark gray-brown plumage, while Short-tailed Swifts may show subtle variations in their plumage but are generally similar in color.