Small to medium-sized noisy, gregarious sparrow- and weaverlike birds. Monogamous and polygynous. Build untidy balls of dry grass (Plocepasser, Sporopipus) or thorny twigs (Bubalornis). Often the male starts building the nest and the female assists in finishing it.Sociable weaver builds unique nest with colonies of up to 500 individuals creating huge communal nests in trees, on telegraph poles, windmills and sometimes of rock faces. Nests are built entirely of grass, each pair builds its own nest chamber used either for roosting or breeding. They are not entirely monogamous.
Red-billed buffalo-weaver, white-browed sparrow-weaver and sociable weaver tend to stay in their nest yearround, This way they save energy and require less food. The simple straight bill indicates they are generalists and probably omnivorous, taking seeds, fruit, nectar and insects.
Bubalornis and Plocepasser breed cooperatively in small groups. Clutches consist of 2-4 variably-coloured eggs, generally pale with heavy markings. Plocepasser is occasionally parasitized by Diderik cuckoo.

Bubalornis = buffalo bird
Plocepasser = sparrow-weaver
Sporopipus = to look for seeds

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