动物成群英文怎么说呢

动物成群的英文表达是 "animals gather in a group" 或 "animals flock together"。这个表达来源于人们常常看到动物成群出现在一起，例如鸟儿飞群、羊群聚集、鱼群游动等。

下面是一些英文例句及其中文翻译：

The birds flocked to the feeder as soon as I put out the seeds. (鸟儿一看到我放的饲料就飞过来了。)
The sheep were grazing in a large flock on the hillside. (羊群在山坡上大量放牧。)
The fish swam in a tight group, as if they were trying to protect themselves from danger. (鱼群紧紧地游动在一起，好像在保护自己免遭危险。)