Rock-duck - Rock-duck

…Several males of the Coting Bird, Perissocephalus tricolor , gather in the same place in the forest that has been passed down for many years, perch on the treetops or on the branches slightly below, and call to each other in a low, resonant voice like a cow's moo, which attracts females and leads to mating. The Rock-cock, Rupicola rupicola , is about 30 cm long, and the males have black areas on the crest, wings, and tail, but are almost entirely a beautiful orange color, while the females are a brown color with a hint of olive. In this species, several males gather in an area of ​​forest that has been passed down for many years, and the males each remove twigs and leaves from a part of the forest floor to claim it, and compete with each other in displays on this area and on nearby branches. …

*Some of the terminology that mentions "rock-dwelling bird" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…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。イワドリRupicola rupicolaは，全長約30cm，雄は冠毛，翼，尾の一部分に黒色部があるほかは，ほぼ全身が美しい橙色，雌は全体にじみなオリーブ色を帯びた褐色をしている。この種も，何年も引き継がれた森林のある地域に数羽の雄が集まり，雄鳥は林床の一部分の小枝や木葉を取り除いてそれぞれ所有し，この占有地や近くの枝上でディスプレーを競い合う。…

※「イワドリ」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報