Wow, so in about 6 weeks, they grow from tiny smidgens (video of last year’s brood, listen to the peeps) to ready to fly:
(The video just says that the female laid 4 eggs in March. The male fed her while she sat on them. The chicks hatched over Easter, and if they grow up healthy, they’ll be released in Austria.)
Those are some of the cutest owls I’ve seen. I guess they’re mostly fluff, but they look a decent size considering they only weigh 3 ounces.