Martinet à collier blanc vs Martinet à gorge blanche

The White-collared Swift (Streptoprocne zonaris) and the White-throated Swift (Aeronautes saxatalis) can be distinguished by their size and plumage patterns. The White-collared Swift is notably larger and has a distinctive white collar, while the White-throated Swift is smaller with a white throat and belly.

Look for the size difference first; the White-collared Swift is much larger. Check for the white collar on the White-collared Swift versus the white throat and belly on the White-throated Swift.

The White-collared Swift is significantly larger than the White-throated Swift.

The White-collared Swift features a prominent white collar around its neck, contrasting with its otherwise dark plumage. In contrast, the White-throated Swift has a white throat and belly, with the rest of the body being dark.