These migratory birds traveled South from Northern states and Canadian provinces when migrating, but overhunting made them increasingly rare.

这些候鸟从北部各州和加拿大各省迁徙到南方，但过度捕猎使它们越来越少。

The U.N. found that as Asian supplies of pangolins decreased from overhunting, illegal traders have turned to Africa to fill demand.

联合国发现，随着亚洲穿山甲的供应因为过度捕获而减少，非法交易者转向非洲以满足需求。

Manatees were put on the endangered list almost fifty years ago after overhunting and collisions with boats caused a drop in their numbers.

因过度捕杀，船只冲撞，海牛数量锐减，并于50年前定为濒危物种。

During the last Ice Age, about 11,700 years ago, overhunting by humans  drove massive mammals, like mastodons and woolly mammoths, to the brink of extinction.

在大约 11,700 年前的最后一个冰河时期，人类的过度捕猎使乳齿象和猛犸象等大型哺乳动物濒临灭绝。

However, once a species is relocated or driven locally extinct due to disease or overhunting, that knowledge is lost forever and could take decades to be restored.

然而，一旦某个物种因疾病或过度捕猎而迁移或在当地灭绝，这些知识就会永远丢失，可能需要数十年才能恢复。

They used GPS data of hoofstock from both historic populations -- centuries old in some cases -- and populations that had been moved over the past few decades due to overhunting and disease.

他们使用了来自历史种群（在某些情况下已有数百年历史）和过去几十年由于过度捕猎和疾病而迁移的种群的 GPS 数据。