lived all the major animal groups that we recognize now. 生活着 我们现在所认识的所有主要动物群
Today, it's thought this is one of the largest groups 如今 人们认为这是最大的
then groups of large animals actually living together, are even rarer. 那么群居的大型动物就更加稀罕了
These elephants live in much smaller groups than their savanna cousins. 森林象群的个体数量 比起它的稀树草原的亲戚们要少的多
The males shuffle into groups, their eggs still tucked away above their feet. 雄企鹅们聚集在一起,此时它们的蛋仍然藏在脚上面
but these rich warm waters can support large family groups 但是这些富饶温暖的水域 足以养活大型家族
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