The communal nests of Sociable Weavers are a distinctive feature on southern Africa's more arid landscapes, like Namibia.
The Sociable Weaver (Philetairus socius ) - besides living in large, gregarious groups, they're also found foraging close to human settlements and seem generally less afraid of people than most other birds.
A closer view of a nest - I'm no bird expert but I guess that some of these structures may be decades old.
The birds often live in harmony with wasps who, in turn, build their nests in the shade underneath the Weavers' home.
Telephone poles are often used where suitable trees are scarce.
A nest constructed in a Quiver Tree - Aloe dichotoma