Lesser striped swallow
The lesser striped swallow (Cecropis abyssinica) is a large swallow. It breeds in sub-Saharan Africa from Sierra Leone and southern Sudan south into eastern South Africa. It is partially migratory with South African birds wintering further north. West African birds leave the north of the breeding range in the dry season.
This is a bird of wooded, mainly lowland habitats, and is replaced in montane grassland by the greater striped swallow, Hirundo cucullata. It is common and often found around human habitation. The lesser striped swallow builds a bowl-shaped mud nest with a tubular entrance on the underside of a suitable structure. The nest has a soft lining, and may be reused in later years. The nest may be built in a cave or under a rock overhang or a tree branch. This species has benefited from its willingness to use buildings, bridges, culverts and similar structures. Given the choice, it will select a high nest site. source