That's the sound of butcher-birds, which prey on splendid wrens.
这是屠夫鸟的声音，它们会捕食这种美丽的鹩莺。
2
They played just the male fairy-wren call. Then they played the trill of the wrens singing immediately after the butcher-birds.
他们先单独播放雄性细尾鹩莺的声音，然后再播放紧接着屠夫鸟叫声的鹩莺啭鸣。
3
Flocked by carrion birds who need him to cut their meals into beak-sized chunks, Pudge the Butcher hones his skills with blades that grow sharper the longer he USES them.