They nest alongside wood stocks in colonies thousands strong. 它们将巢建在树干上 一群多达好几千只
Maybe each male is trying to show how strong and dexterous he is 这或许是雄江豚展示自己 强壮身体和敏捷身手的一种方式
smooth-coated otters form family groups up to 17 strong. 印度水獭的一个家族可多达17名成员
Packs of them, eight to ten strong, shadow the migration. 8~10只狼组成的小股部队 悄悄地尾随着迁徙的大军