Animal Planet (Animals That Are Awesome Architects) - Our planet`s first builders - Avian Architecture - Birds

  • 6 years ago
Sociable Weaver Birds

If you’re ever in southern Africa and see something that looks like a huge haystack stuck up in a tree, you’ve probably found a sociable weaver nest. Sociable weavers build the biggest nests of any bird, housing up to 400 individuals. Some nests can remain occupied for over a hundred years.
According to the San Diego Zoo, a nest consists of separate chambers, each of which is occupied by a breeding pair of birds. Sociable weavers use large sticks to create the roof and basic structure of the nest and dry grasses to form the individual chambers, which are lined with softer grasses and fibers.
They even install a security system: Sharp, spiky straw protects the entrance tunnels from predators. (Also see “Fish ‘Engineers’ Dig Up Homes for Marine Life.”)

The inner chambers retain heat and are used at night, while the outer rooms are cooler and used for daytime shade. Sociable weaver nests are so sturdy and comfortable that other birds are known to move in and share the cozy space.