There are a lot of old trees in my town. These are mostly linden trees over a hundred years old. There are lots of holes large and small. Various birds and owls nest there. We have tawny owls.I’ve been watching them for many years. In the evenings, they call while sitting or flying from tree to tree. Observation with binoculars is possible. Unfortunately no photography. Only when the young leave the hollow, because during the day you can take photos of satisfactory quality. There used to be more of these birds. I take pictures in the last days only for the female and her young.