The animators went to an owl sanctuary to learn how to properly depict owls in flight and the ruffling of their feathers, as well as owl behavior and their dietary needs.
This was in production for more than three years, with a staff in excess of five hundred.
This movie is set in Australia, while the books are set in North America. Some of the owl species featured are not found in Australia.
This movie was based on the first three books of the series. "The Capture", "The Journey", and "The Rescue".