The mandarin ducks are courting. 鸳鸯正在示爱

139. but they're also thin, soft and edible.
     而且叶子更薄,更软,更好吃
140. And others can eat the leaf eaters.
     螳螂捕蝉,黄雀在后
141. It's spring in the great broad leaved forests of Eastern Europe and Asiatic Russia.
     这是跨越东欧-亚洲-俄罗斯的 世界上最大的落叶阔叶林的春天
142. The mandarin ducks are courting.
     鸳鸯正在示爱
143. The female mandarin nests in a tree hole
     雌鸳鸯在树上筑巢
144. and when it's time for everyone to leave she leads the way.
     她正在带着所有的宝宝们离开巢穴
145. The ducklings are only twenty four hours old.
     小鸳鸯才24个小时大

来自《行星地球 第一季 第十集 Planet Earth S01E10 季节森林》第 142 行