The young are called “owlets.” They are covered with snow-white down for 6 days. This is gradually replaced by buff-colored down which develops into a thick, wooly covering that is still in evidence for about 50 days.
The little owlets are hungry all the time. Both parents are busy night after night ransacking the adjoining areas to catch an unbelievable number of small ground creatures to feed their ravenous babies.
Adult plumage is acquired in about 7-1/2 weeks, at which time, after much practicing about the nest, the young venture out for their first lessons in flying and hunting.
Trivia Q: How many voles does an owlet eat each night?