The wire-tailed swallow (Hirundo smithii) is a small passerine bird in the swallow family. It has two subspecies: H. s. smithii, which occurs throughout Africa, and H. s. filifera, which is found in southern and southeastern Asia. It is mainly resident, but populations in Pakistan and northern India migrate further south in winter. The genus name Hirundo is the Latin word for swallow. The species name smithii commemorates Christen Smith, a Norwegian botanist and geologist.
The wire-tailed swallow, Hirundo smithii, is a diminutive and agile passerine, a member of the swallow family. It is adorned with a lustrous blue plumage on its upperparts and a stark white on the underparts. A chestnut cap crowns its head, adding a touch of warmth to its appearance. The species is particularly noted for its elongated outermost tail feathers, reminiscent of fine wires trailing in flight. These distinctive "wires" are more pronounced in males than in females.