moulting
v. 換羽,脫毛( moult的現在分詞 ); <喻>去掉(舊習慣、觀點等)
When an animal or bird moults, it gradually loses its coat or feathers so that a new coat or feathers can grow.
Finches start to moult at around twelve weeks of age.
燕雀大約在12個星期大小的時候開始換羽毛。
1. periodic shedding of the cuticle in arthropods or the outer skin in reptiles