Why do owls laugh?

"Owl's laughter" refers to the cry of an owl, which sounds like a grim smile. And it seems that people always die in the area where they hear the "owl's laughter", so people always associate it with unknown things, but it has nothing to do with it.

However, recent scientific research seems to find that owls have a special sense of smell for the breathing of dying people, which seems to explain why the area where owls are heard always dies.