Both are quite alike and at this time of the year both may be found. The Chilean Swallow visits us in winter and the white-rumped swallow already turns up in small groups since early August. By the end of February white-rumped swallows leave.

Both Tachycineta species are small and the same size, white ventrally and have a white rump. The most evident difference is the white eyebrow, though their quick and tireless habit of flight makes it difficult to see. Both are blue but the white-rumped swallow may have a green tinge as well. Photos may be of great help for identification but it requires skills in photography