of its range, although in the most southerly part it is migratory. In Brazil and Argentina, it is only present from approximately mid-September to mid-April. Where this population winters is not well known, but it is most likely in the Guianas, Venezuela, and Colombia. Behaviour and ecology Breeding The white-winged swallow builds a cup nest lined with other birds' feathers and some seed inside a tree hole, between boulders or in man-made structures. Nests are usually built a few metres above water; pairs nest separately. The clutch is three to six white eggs, measuring in size and weighing . Food and feeding The white-winged swallow feeds primarily in flight at a low altitude, catching flying insects. It usually forages over water but may also feed over land. In between foraging attempts, it usually perches on branches near bodies of water. Flight paths are direct and they fly with a flapping flight. Conservation The white-winged swallow is classified as Least Concern by the IUCN, based on its very large range, apparently stable population, and large population size. References American Ornithologists' Union (AOU) (2000): Forty-second supplement to the American Ornithologists' Union Check-list of North American Birds. Auk 117(3): 847–858. DOI: 10.1642/0004-8038(2000)117[0847:FSSTTA]2.0.CO;2 ffrench, Richard; O'Neill, John Patton & Eckelberry, Don R. (1991): A guide to the birds of Trinidad and Tobago (2nd edition). Comstock Publishing, Ithaca, N.Y.. Greeney, Harold F. & Merino M., Paúl A. (2006): Notes on breeding birds from the Cuyabeno Faunistic Reserve in northeastern Ecuador. Boletín de la Sociedad Antioqueña de Ornitología 16(2): 46–57. PDF fulltext Hilty, Steven L. (2003): Birds of Venezuela. Christopher Helm, London. white-winged swallow Birds of Colombia Birds of Venezuela Birds of Trinidad and Tobago Birds of the Caribbean Birds of the Guianas Birds of the Amazon Basin Birds of Brazil white-winged swallow