DICT.TW Dictionary Taiwan

 at roost
 在窩里,在栖息

 Roost, n.
 1. The pole or other support on which fowls rest at night; a perch.
    He clapped his wings upon his roost.   --Dryden.
 2. A collection of fowls roosting together.
 At roost, on a perch or roost; hence, retired to rest.