Pygochelidon cyanoleuca (Blue-and-white Swallow)
12-13 cm. Glossy metallic blue above, pure white below, crissum white, underside of the wings dark. Somewhat similar to the Golondrina Nuboselvática (Orochelidon flavipes) of the eastern Andean slopes, but the latter has a creamy throat and dingier sides.
