A series of giant nests, which can each house up to 500 birds, built on telephone poles and road signs in Northern Cape Province, South Africa. /VCG Photo

The haystack-looking nests are built by sociable weavers, a species of bird that are usually seen in the southern Africa bush. /VCG Photo

The delicate homes of the small birds, which can weigh over a ton, have separate breeding and roosting chambers providing shelter and shade for them as well. /VCG Photo

Unlike other bird's nests, the sociable weavers' "house" also help other birds and fauna to escape the heat, such as the paper wasps, ashy tit and red-headed finch. /VCG Photo