Fetching details from the dictionary...
winter wren (Troglodytes troglodytes)
「鷦鷯」 has another reading with different meanings.
鷦鷯のさえずりが森に響いている。
The chirping of the winter wren echoes in the forest.
鷦鷯は小さな鳥として知られる。
The winter wren is known as a small bird.