The species is called “tufted” because it has a gray crest on the head. It is called a “tit” because it reminded early observers of the tits of Europe. Titmice are a resident species (they do not migrate, but remain in the same region over the course of the year), so they are a frequent backyard visitor and I have the pleasure of watching them from behind a lens year-round. And for the record, the correct plural is “Titmice”.