Inspired by a report of singing Tengmalms and Pygmy Owl not far from Oslo I drove around Maridalen this evening. It was a cloudless, windless night with a near half moon which I judged to be pretty good conditions. Despite stopping in a number of places and walking over a kilometre into the forest on the way to Mellomkollen I drew a complete blank on the target species (as I usually do).
Had better luck with Tawny Owl though with birds singing in 2 different localities. At one had a male and female calling together where with a bit of luck I should be able to locate the nest hole in daylight.