Habitat preferences of two sparrow species are modified by abundances of other birds in an urban environment.

Every species has certain habitat requirements, which may be altered by interactions with other co-occurring species. These interactions are mostly ignored in predictive models trying to identify key habitat variables correlated with species population abundance/occurrence. We investigated how the structure of the urban landscape, food resources, potential competitors, predators, and interaction between these factors influence the abundance of house sparrow and the tree sparrow in sixty 25 ha plots distributed randomly across residential areas of the city of Poznań (Poland).