The Sociable Weaver

The Sociable Weavers are known for being a peaceful and cooperative bird specie. Their nests are the largest built by any bird, and the structures are permanent made on trees and other tall objects.

Instead of building independent nests, up to 300 pairs of birds come together and take over entire trees by building giant mega-nests or "apartment structures" up to 8 meters wide, 1,5 meters high and with an individual room for every couple. As with a huge condo complex, there are multiple ‘basement’ entrances that lead up through clusters of chambers.
 

Matilda Weibull Lindborg