Focal Species

NestWatch accepts data on ALL North American breeding birds. However, we have a list of Focal Species which were chosen based on many factors including migratory status, nest type, range and tolerance to disturbance. These species were also selected because you are very likely to encounter them in your backyards and neighborhoods.

Barn Swallow (Hirundo rustica)

Nesting habitat: Breeds in a variety of habitats, sometimes near water.

Nest site: The nest is usually stuck against a flat surface with overhead support.

Nest type: An open shallow cup of mud pellets mixed with grass and hair; thickly lined with feathers. Built by both adults.

Eggs:
Clutch size: Usually 4-5, at times 3-7.
Color: White, spotted with brown, pale purple, gray.
Egg size: 16.3-21.7 mm x 12.4-14.8 mm.

Incubation period: 13-15 days.

Nestling period: Young fed by both adults. Brooded only by the female. Fledge between 15-24 (usually 20) days.

Number of broods per season: 2.

Distribution Map

Species Distribution