Not sure what you mean by passing through, but cardinals are non-migratory residents in much of their range. So they stick around all year. House sparrows and sardinas don’t really compete for resources. So I doubt they will chase one another off. He’ll (?) stick around if he finds enough food and a mate.Spotted a Cardinal in the back yard today. Just passing through? Are chances high those little house sparrow fucks are gonna chase it away?