Swallows are characterised by their long tail streamers, glossy blue black body and creamy white underparts. They have a rich red forehead, chin and throat and the legs and bill are black. The female's tail streamers are shorter than those of the male. Juveniles are duller, lack both the red forehead, chin and throat and the tail streamers are much shorter.
The board which the nest is mounted on should be placed directly under the roof so that the top is protected. Swallows like to brood together so it is advisable to put more than one nest up . The swallows nest is made of clay, size L x W x H approx