Mestaae, one of our education Eastern screech-owls. Mestaae, like all raptors, recently went through a molt. He lost many of his feathers, and it took a few weeks to replace them.
We thought you'd enjoy some "before" and "after" pictures.
We also thought you'd enjoy reading some more information about bird feathers and molting - here is a great site from the Cornell Lab of Ornithology.