杜と宇うとうMeanings1nounlesser cuckoorare termRare literary or classical name for the lesser cuckoo (Cuculus poliocephalus). In modern Japanese, the bird is almost always called ホトトギス.See also: ホトトギス杜と宇うは漢かん詩しなどで詠よまれることがある鳥とりの名めいだ。杜宇 is a bird name that appears in Chinese poetry and similar contexts.