nostril fly
noun
1- a parasitic fly that lays its eggs in the nostrils of sheep, goats, and deer. The larvae develop in the nasal cavities before being sneezed out.狂蝇。
1.1
- The sheep nostril fly or sheep bot (Oestrus ovis) and the deer nostril flies (genus Cephenemyiat), both in the family Oestridae.羊狂蝇（拉丁名Oestrus ovis）和鹿蝇（鹿头狂蝇属）都属于狂蝇科。