bellbird

Japanese: bellbird

...Many species exhibit unique behaviors when forming pairs. For example, males of the bellbird ( Procnias genus, English name: bellbird) sing in the trees with a very resonant voice, as their name suggests, and display to attract females. In the cotinga bird Perissocephalus tricolor , several males gather in the same place in the forest for many years, perch on the treetops or on the branches slightly below, and sing to each other with a low, resonant voice like a cow's mooing, which attracts females and allows them to mate. ...

From the Shrike Flycatcher

...A general term for birds of the passerine order, family Muscicapidae, subfamily Pachycephalinae. Because their cry is a whistle, they are also called whistlers or bellbirds in English. They also have large, round heads, so are called thickheads, and some species have beaks similar to those of a shrike, so they are also called shrike-thrush.

*Some of the terminology that mentions "bellbird" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…つがい形成のときには特異な行動を行うものが少なくない。例えば，スズドリ類(Procnias属3種，英名bellbird)の雄は，その名のとおり，樹上で非常によく響く声で鳴いて雌を引き付け，ディスプレーを行う。ハゲガオカザリドリPerissocephalus tricolorでは，数羽の雄が森林中の何年も引き継がれた同じ場所に集まり，樹冠かそれよりやや下層の枝に止まって，ウシの声のような響きのある低い声で鳴き合い，これに雌が引き付けられて交尾が行われる。…