Swallows are a highly aerial species seen almost worldwide. They often occur in large flocks, circling in the air while catching insects.
The Southern Rough-winged Swallow (Stelgidopteryx ruficollis) is medium-sized (5 in.) swallow with slightly notched tail. It is commonly seen throughout the lowlands and foothills. This swallow is easily recognized by the characteristic cinnammon-buff throat, triangular wings, whitish rump, and pale lower underparts. It generally doesn't fly very high above the ground.
The species is widespread in n. Argentina, west of Andes south to sw. Peru.
The Southern Rough-winged Swallow nests in holes in banks in loose colonies, typically along rivers. Nests are composed of dry grass, weed stems, leaves, and little pods. The birds themselves do the digging, carrying off each mouthful and spitting it out so far that it could not possible lead some predator to the nest. The nests are dug so that there is a several-foot stretch of wall above and below the entrance to the nest.
Conservation status of the Southern rough-winged Swallow: Least Concern.
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