Tag : Birds

    Researchers Find Vegetarian Birds Are More Sociable Than Insect Eaters

    Vegetarian Birds
    Pushkar Raj Kapoor
    April9/ 2022

    London: A new study has found that weaver birds that eat seeds flock together and nest in colonies more commonly than those species that eat insects. For the first time, the study statistically supports an influential ecological hypothesis on social behaviour first proposed 58 years ago. The findings were published in the journal 'The American Naturalist'. Weaver birds are a family of 118 songbird species that live mostly in sub-Saharan Africa and are so-called because of the elaborate construction of their nests. Whilst some species live on the savannah feeding on seeds, other species live in the forest and mostly dine on insects. The researchers looked at data collected from previously published studies of many weaver species to investigate the relationships between diet, habitat and social behaviour. They observed that birds living in the open savannah tended to flock together, foraging in groups to help find the best sources of seeds. The same birds also nested in large colonies and often had a polygamous breeding behaviour, pairing with multiple mates during each season. In contrast, the species living in the forest tended to be solitary foragers and nesters that did not flock together or live in colonies. These birds tended to be monogamous breeders with a single mate per season. The research, for the first time, statistically supports the ecological hypotheses of social evolution developed by a British ethologist, John Crook, who first proposed the link between diet, habitat and social behaviour in 1964. Crook's study became a textbook example of ecological effects on mating systems, and it has influenced generations of behavioural ecologists. The new study, in addition, also found that diet and habitat predicted sexual ...

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