- 鸟类学 niǎolèixué ornithologyornithology; the scientific study of birds
- 中国鸟类学会 zhōngguóniǎolèixuéhuì China Ornithological SocietyThe China Ornithological Society, a professional organization dedicated to the study of birds in China
- 祖鸟类 zǔniǎolèi ancestral birddinosaur ancestors of birds
- 鸟类学家 niǎolèixuéjiā ornithologistornithologist; bird expert