绒羽

又称冉羽.结构简单.基部有短的羽根埋于皮肤内.羽根的顶端发出许多细长而软的羽枝，羽枝两侧生有许多羽小枝.羽小枝的羽小钩不发达，所以不形成羽片，而成一簇绒毛.绒羽密集于 正羽之下，形成松软的隔热层.秋冬绒羽多，一些 游禽尤为发达.早成 雏鸟出壳后全身长满雏绒羽，有些晚成雏也生有少量的雏绒羽.雏绒羽在雏鸟出壳后１０天左右即随正羽的长出而脱落.相 关 词 条:绒羽 |秃鹫 | 羽毛 | Also known as Ran Yu. Simple structure. The base of a short Hane buried in the skin. Hane the top of the issue in many branches slender and soft feathers, feather sticks on both sides there have been many feather sprig. Haneda a small sprig of feather hook underdevelopment, so I do not form a pinna, formed a cluster of fluff. velvet feathers are feathers in the under dense form insulation layer of soft. Winter velvet feathers, with some particularly well-developed Youqin. As early as nestlings hatched chick body covered with velvet feathers, some late into the child gives birth to a small number of child velvet feathers. underage velvet feather in the chick hatched after 10 days that grow with the feather of which are off. Related term: velvet feather | vulture | Feather |