Blue-and-white swallow

The Blue-and-white Swallow is a small, elegant bird with striking deep blue upperparts and clean white underparts. Commonly seen darting and swooping over open areas, rivers, and towns, this swallow is highly social and often forms loose flocks. It is widespread throughout Patagonia, where it breeds in a variety of habitats, including cliffs, riverbanks, and human structures. Its cheerful twittering calls and acrobatic flight make it a favorite among birdwatchers. The species is migratory in the southern parts of its range, moving northward during the austral winter. Blue-and-white Swallows build cup-shaped nests from mud and plant material, often attaching them to sheltered ledges or man-made structures. Both parents share in feeding the chicks, which fledge after about three weeks. Their adaptability to human presence has helped them thrive even as natural habitats change.