I finally found one of the owls in a hollowed tree here. Two years ago I spoke with one of the wildlife guardians who told me about owls living in this tree, but every time I went to look, it was empty. That is, until last weekend, when I bumped into the same wildlife guardian and we went to look together.
The feathers look like it got plenty wet, but I don't know birds well.
EOS R3, 200-400mm + 1.4x TC (built in), 100% crop, 1/400sec, ISO 200, f/5.6.