horned owl, scops chinensis, bird of ill omen
鵂 refers to a specific kind of owl: the horned owl or scops owl, often considered a bird of ill omen in folklore.
鵂 combines 休 (rest) and 鳥 (bird), likely a phono-semantic compound where 休 hints at the sound and 鳥 indicates a bird. The exact historical development is uncertain.
A bird (鳥) that rests (休) during the day and brings omens at night: the horned owl.
For キュウ, imagine a horned owl resting quietly in a tree, and its call sounds like a soft 'kyuu' echoing through the night.