Sociable weaver birds live in Africa's Kalahari Desert, where they build their huge nests on sparse trees and telephone poles. These nests can be more than 6 meters long and weigh more than 900 kilograms. When they become too big or waterlogged, they can cause the tree beneath them to collapse. Some nests are even more than a century old, with generations of weaver birds occupying the individual chambers.
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Key Facts In This Video
Sociable weavers build gigantic, communal nests that can be six meters across with up to 100 nesting chambers. 00:36
Oropendolas build their hanging nests near hornets and wasps to keep predators away. 02:07
Some species of bower bird paint the walls of their bower with crushed berries or charcoal. 02:52