Bernard Castelein / White-winged swallow (Tachycineta albiventer) Madidi National Park, Bolivia

Bernard Castelein / White-winged swallow (Tachycineta albiventer) Madidi National Park, Bolivia

Murray Cooper / White-winged Swallow (Tachycineta albiventer), Ecuador

Angelo Gandolfi / White-winged swallows (Tachycineta albiventer), Parana State, Iguazu, Brazil, September.

DAVID TIPLING / White winged swallow courtship {Tachycineta albiventer} Amazonia, Peru, South America

DAVID TIPLING / White winged swallow {Tachycineta albiventer} Amazonia, Peru

Thomas Marent / White-winged Swallow (Tachycineta albiventer), Los Llanos, Colombia

Sean Crane / White-winged Swallow (Tachycineta albiventer) pair, Lake Chalalan, Madidi National Park, Bolivia

Pete Oxford / White-winged Swallow (Tachycineta albiventer) and Proboscis Bat (Rhynchonycteris naso), Yasuni National Park, Amazon Rainforest, Ecuador

Joel Sartore / Photo Ark / European pratincole (Glareola pratincola) preening then ruffling its feathers, Pinola Conservancy. Captive.

Joel Sartore / Photo Ark / European pratincole (Glareola pratincola) ruffling its feathers before preening, Pinola Conservancy. Captive.

Joel Sartore / Photo Ark / Northern rough-winged swallow (Stelgidopteryx serripennis) juvenile profile whilst looking around. Captive.