Pirre Hummingbird vs Rufous-tailed Hummingbird

The tail color is the most reliable field mark: the Pirre Hummingbird has a green tail, while the Rufous-tailed Hummingbird has a distinctive rufous tail. Both species are similar in size and structure, but their tail colors provide a clear distinction.

Focus on the tail color: green for Pirre Hummingbird and rufous for Rufous-tailed Hummingbird. This difference is visible even at a distance with binoculars.

The Pirre Hummingbird has a green tail, contrasting with the Rufous-tailed Hummingbird's rufous tail. This is the most noticeable difference in plumage.