At first I thought that was some hilarious forced perspective, and was trying to figure out how they managed that in the photo (the narrow depth of field would make that...difficult)
apparently adults are about the size of a sparrow, so I'm guessing this floofer is recently fledging.
Birds don't really grow like that. Once they are flying that's pretty much their Max size. In fact, some adults can appear slightly smaller as some immature birds have larger "training" feathers.
Perhaps I used the wrong term. I think I meant branching? When they’re leaving the nest by hopping around (but not actually flying.)
Either way, compared to the size of the presumably adult Pygmy owls I’ve seen, this guy isn’t full size. (He still has some downy feathers poking through too.)
These little owls have textbook ocelli, with two large, black ovals surrounded by white feathers giving the strong impression of a sinister face. At just half a foot tall, these owls are some of the smallest in North America.