bird - willow warbler ( phylloscopus trochilus ) sitting on a branch of a tree and cleans his feathers on a cold sunny autumn day. - 柳鶯 個影片檔及 b 捲影像00:15
female chiffchaff builds her dome-shaped nest in low vegetation as her mate sings overhead . credit line: patrick fox/visionhaus/getty images. - 柳鶯 個影片檔及 b 捲影像00:28