White-throated Blue Swallow vs Red-rumped Swallow

The most reliable field mark to differentiate these swallows is the throat color: the White-throated Blue Swallow has a distinctive white throat, while the Red-rumped Swallow lacks this feature. Additionally, the Red-rumped Swallow is known for its red rump, which the White-throated Blue Swallow does not have.

Look for the white throat on the White-throated Blue Swallow and the red rump on the Red-rumped Swallow. These are the most reliable visual cues for distinguishing between the two species.

The White-throated Blue Swallow features a white throat, contrasting with the Red-rumped Swallow's lack of a white throat. The Red-rumped Swallow is characterized by its red rump, a feature absent in the White-throated Blue Swallow.