It's the world's heaviest flying bird, 它是世界上体重最大的飞禽

114. Once alarmed, most insects stay put.
     一旦警觉起来 大多数昆虫会静止不动
115. The bee-eaters need someone to stir things up a bit.
     红喉蜂虎需要找帮手来捣乱
116. A kori bustard.
     一只灰颈鹭鸨
117. It's the world's heaviest flying bird,
     它是世界上体重最大的飞禽
118. so it should be bulky enough to kick up some insects.
     凭它庞大的身躯 应该能轰出一些虫子
119. Bingo!
     成功了
120. Until someone else comes along
     直到有别的蜂虎加入

来自《行星地球 第二季 第五集 Planet Earth S02E05 草原》第 117 行