They're searching for a rather unusual food - 它们正在寻找一种很特别的食物

126. It's hard to imagine what could have attracted it here.
     真不知道这里有什么吸引着它
127. At this time of the year bears should be fattening up for the winter.
     在每年的这个时候 熊必须为越冬储备脂肪
128. Yet they gather in some numbers on these apparently barren slopes.
     然而却有一定数量的灰熊 聚集在这片不毛之地
129. They're searching for a rather unusual food -
     它们正在寻找一种很特别的食物
130. moths.
     飞蛾
131. Millions have flown up here to escape the heat of the lowlands
     为了躲避低洼地带的炎热 数百万只飞蛾抵达此地
132. and they're now roosting among the rocks.
     栖身于岩石缝隙之中

来自《行星地球 第一季 第二集 Planet Earth S01E02 山地》第 129 行