Tiny Birds Build Communal Nests So Large They Can Pull Down Trees
Original article on OddityCentral.com – a blog on oddities and wacky news http://www.odditycentral.com/
While most songbirds build small, discreet nests designed to shelter one clutch of eggs, the Social Weavers (Philetairus socius) of southern Africa build communal nests so large that they can pull down mature trees. Each structure can weigh over a ton, and range upwards of 20 feet wide and 10 feet tall, with over a hundred separate nesting chambers. Successive generations refurbish and reuse these compartments, often for more than a century.
Social Weavers utilize several different building materials, starting with a basic structure of woven twigs. They then line the interior with grasses and feathers and construct a 10-inch long, one-inch wide private entrance with downward pointing spiky straws to deter snakes. While a breeding pair will have a private apartment, most chambers house three or four of the birds at a time. The benefits of this lifestyle become clear in the context of the desert where temperatures vary dramatically.
Source: http://www.odditycentral.com/animals/tiny-birds-build-communal-nests-so-large-they-can-pull-down-trees.html
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