Massive Bird Nests on Telephone Poles
The nests are highly structured and provide birds with a more advantageous temperature relative to the outside. The central chambers retain heat and are used for nighttime roosting. The outer rooms are used for daytime shade and maintain temperatures of 7-8 degrees Celsius inside while outside temperatures may range from 16-33 degrees Celsius.
The birds acquired the name “sociable” not because they live in large colonies, but because they are known to share their nests with several other species including owls, vultures, eagles, red-headed finches, ashy tits, familiar chats, and many more. The weaver birds are more than willing to welcome the guests. More residents mean more eyes keeping a watch for danger. And the weavers often learn from the other birds where new sources of food can be found.
These lovely pictures entitled Assimilation were captured by photographer Dillon Marsh.
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Sociable weavers continually build or repair their nest. source
They nest in trees, too. Peter Chadwick/Getty