巣す穴あな

noun

nesting hole; burrow; den

Refers to a hole or tunnel dug by an animal for nesting or shelter. Common for small mammals, birds, and insects.

• ウサギが巣す穴あなから顔かおを出だした。

  A rabbit poked its head out of the burrow.

• キツツキは木きに巣す穴あなを掘ほる。

  Woodpeckers drill nesting holes in trees.