Two great horned owls have been hooting regularly in the late afternoon and early evening. After listening to them one evening, I decided to walk up the trail to see if I could find one. I found one sitting on a branch next to the trunk in a Douglas-fir tree. It was preening its feathers and resting. I watched it for a minute then quietly kept walking.
On the website All About Birds by The Cornell Lab, it says, “Mated pairs are monogamous and defend their territories with vigorous hooting, especially in the winter before egg-laying and in the fall when their young leave the area.” Maybe this is the reason for the recent hooting.