Tachycineta leucorrhoa
White-rumped Swallow
photo needed!
Photo © ?
The White-rumped Swallow breeding range is from northern Bolivia to southern Brazil, south to northern Argentina (Buenos Aires), but the exact breeding range is undetermined. The species favors bodies of water, including lagoons and marshes. White-rumped Swallows may be resident year-round in the more northern portions of their breeding range (or only partly migratory), but populations in Argentina are migratory (although some individuals remain all year in Buenos Aires).

This is the focal species at the Buenos Aires and Santa Fé Golondrinas Sites in Argentina.

White-rumped Swallows forage over water and open areas of woodlands, using a rapid flight similar to that of the Tree Swallow.

Breeding commences in October. Nest sites include various cavities and are constructed of straw and fine fibers, lined with feathers. This species is reported to be particularly aggressive to conspecifics (Sclater and Hudson 1888) and may require more extensive spacing between nests than in other Tachycineta species.

Clutch sizes are five to seven eggs, but the incubation and nestling periods are unknown.