male bird
Only when written 雄鳥
General term for any male bird; Restricted this sense to the kanji 雄鳥, but kana spelling is common.
See also: めんどり
There are many male birds in this forest.
Standard kanji spelling for 'rooster'; this is especially appropriate for sense 2.
Kanji spelling restricted to the general 'male bird' sense; less common than 雄鶏 for 'rooster'.
Both senses are usually written in kana; this is the most common practical spelling.
Compound of 雄 (おん, 'male') + 鳥 (とり, 'bird'), with rendaku voicing of とり to どり. The kanji 鶏 specifically means 'chicken'.