Sparrow fact

At Gotham this morning sparrows were hopping around the floor looking for crumbs. I was referring to them as he or she depending on which one hopped over really close. The Mister wanted to know if I was randomly calling them he and she. He didn’t know that sparrow fact! So I told him – boys have a black bib, girls have none. Now he’s wondering what *important* bit of information got bumped out of his brain so that that gem can reside there. Eyeroll.