How does scattering feed widely impact management efforts aimed at attracting native ground-feeding sparrows?

Answer

It can inadvertently subsidize House Sparrow populations disproportionately.

Because House Sparrows are highly comfortable and effective ground foragers, scattering feed widely can disproportionately support their populations, complicating efforts to attract native ground foragers.

How does scattering feed widely impact management efforts aimed at attracting native ground-feeding sparrows?
dietbirdfeedgroundHouse Sparrow