While I still hold out some hope, we’re largely past the key window for detecting great horned owls vocalizing.
“In Wisconsin, territorial hooting ends in mid-Feb, in keeping with timing of first eggs laid…” – Birds of North America
Across the state, birds are probably on eggs by now and thus less conspicuous. Since this might be my last winter here, I may not find this species breeding in my atlas block, without some serious luck and/or spotting a nest!