Nice pose, perch and complementing BG. It is a bit tight in the frame for me and it seems a bit oversharpened. I might clone out the OOF branch in the lower left.
Gotta admire the patterns in the feathering of this little guy even if he is basically a "common" little sparrow! Your detail is great and so is the complementing perch and background. I suspect he lost his tail making a narrow escape from a predator; while birds do molt, they rarely lose all their tail feathers at the same time while molting. I have seen birds instantly shed ALL their tail feathers, however, to avoid being caught.