This time of year, some raptors can show some pretty extreme molt and feather wear, leading to tricky identification. Alex has posted about this on a previous post. Young birds hatched last year are replacing their juvenal feathers with adult feathers and this transition can create some interesting looking birds like the unfortunate Red-tailed Hawk below which is missing several primaries in the wings and all of its rectrices (tail feathers).
Red-tailed Hawk in extreme molt