The African river martin (Pseudochelidon eurystomina) is a perching
bird, one of two members of the river martin subfamily of the swallow
family, Hirundinidae. First described by German zoologist Gustav
Hartlaub in 1861, the African river martin was not at first recognised
as a swallow, but was later placed in a separate subfamily shared with
the Asian white-eyed river martin. A large swallow with a variety of
unmusical calls, it is mainly black with a blue-green gloss to the head
and a greener tint to the back and wings, and has red eyes, a broad
orange-red bill and a square black tail. Young birds are similar in
appearance, but with browner plumage. It displays both in flight and on
the ground. The main breeding areas are in the Democratic Republic of
the Congo along the Congo River and its tributary, the Ubangi, in
habitats characterised by a mixture of tropical forest types including
swampy or seasonally flooded woodland. The African river martin is
migratory, wintering in coastal savanna in southern Gabon and the
Republic of the Congo. It nests in burrows in sand banks, and in winter
digs tunnels for night-time shelter.
Read more: <https://en.wikipedia.org/wiki/African_river_martin>
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