视频对白:

caribou

n.（北美洲产的）驯鹿

He added that hydropower operations, mining and other human activities are additionally taking over caribou habitat.
他还补充道水力发电经营，矿产和其他人类活动正侵占驯鹿的栖息地。

Since the number of moose and caribou is falling, hunters are allowed to shoot the competing wolves from the air.
由于北美驼鹿和驯鹿的数量日益减少，猎人们现在已被允许从空中射杀狼这种竞争对手。