koilonychia

例句：

1. 1.The koilonychia feathers are a unique feature of this bird species.
   这种鸟的猫头鹰羽毛是其独特的特征。
2. 2.The koilonychia feathers are used in traditional Chinese medicine for their medicinal properties.
   猫头鹰羽毛在中国传统医学中被用于它们的药用特性。
3. 3.The koilonychia feathers are collected from wild animals and sold as souvenirs.
   猫头鹰羽毛是从野生动物那里收集来的，作为纪念品出售。