The tawny owl nest is typically in a tree hole and eggs and young are fiercely defended against potential predators. This owl is highly territorial, and many young birds starve if they are unable to find a vacant territory once parental care ceases. Tawny owls will also nest in old European Magpie nests, squirrel dreys or holes in buildings, as well as readily using nest boxes.
A typical clutch of eggs is two to three which is incubated by the female alone for 30 days to hatching.
Additional Information :
Birds of Denmark - Tawny Owl - birds-of-denmark.dk
The Owl Pages - Tawny Owl - owlpages.com
Animal Diversity Web - animaldiversity.org