n.雀類
This behaviour is commonly observed among several species of finch. 這種行為常常可以在幾種雀科鳴禽中看到。
n.紅腹灰雀
n.金翅雀
n.花雞；蒼頭燕雀(一種歐洲鳴禽)
n.金翅鳥
