Last but not least, as many rare birds and animals are kept as pets, they will surely be hunted on a large scale, which means a threat to the balance of the ecosystem.

最后，许多珍禽异兽作为宠物饲养，他们一定会被大规模猎杀，这意味着威胁到生态系统的平衡。

youdao

Rare birds and animals that cannot be found anywhere else in the world have been disappearing at the rate of one a year since the turn of the century.

世界上除了热带雨林以外，在其它任何地方都找不到的珍稀鸟类和珍稀动物，在这世纪之交正在以每年消失一种的速度逐渐灭绝。

youdao

Rare birds and animals that cannot be found anywhere else in the world have been disappearing at the rate of one a year since the turn of the century.

世界上除了热带雨林而外，在其他任何地方都找不到的珍稀鸟类和珍稀动物，在这世纪交替的时候正在以每年消失一种的速度逐渐灭绝。

youdao

The centre opened in 1993 as a place to rescue and care for rare birds of prey and exotic animals.

BBC: Animals at the Gentleshaw Wildlife Centre