House sparrow visiting nest box

The last couple of days, we have seen a male house sparrow going in our new nest box. Is it too early to be checking it out as a potential nest site? And is it usually the males who build the nests? thanks 

  • Not too early. They probably won't lay eggs yet, but will be setting up territories and defending them. Both sexes build the nest. It may appear to be the male doing most of it early on, but I suspect it's just a case of dumping stuff in and making the site look occupied, rather than building something constructive.

    I have terrible trouble with them out competing house martins.