But other dog species ambushed their prey in a manner similar to the cat family. However, these dogs weren’t as good as the cats at this technique – and all the canid species who used it are now extinct.

不过也有其他犬科动物伏击猎物的方式与猫科动物相似。然而，这些犬类动物并不像猫科动物那样擅长这项技能——所有曾使用这项技能的犬科动物现在都已经灭绝了。

Dr Silvestro explained: “The cats have retractable claws which they only pull out when they catch their prey. This means they don’t wear them out and they can keep them sharp. But the dogs can't do this, so they are at a disadvantage to the cats in an ambush situation.

西尔韦斯特罗博士解释称：“猫科动物只有在抓到猎物时才会亮出它们可伸缩的爪子，这意味着它们不会磨损并能够时刻保持锋利，但是犬科动物不能做到这一点。因此，同猫科动物相比，它们在伏击方面处于劣势。

The evolutionary success of carnivorous animals is strongly linked to their ability to obtain food, meaning that there can be significant competition for prey when there is insufficient supply for the population.

食肉动物的进化成功在很大程度上与它们获取食物的能力有关，这也意味着当食肉动物的食物供应不足时，猎物的争夺将十分激烈。

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