Other species of canids — dogs, wolves — hunt in packs, but her life is a lonely one.

其他的科动物——狗、狼，都是群体狩猎，但是鬃狼却是孤军作战。

So two out of the three canid subfamilies are dead and gone.

所以科亚科中有两已经灭绝了。

Like other truly wild canids, it displays unique behaviors.

与其他真正野生的科动物一样，它表独特的行为。

But other groups, like canids, bears, and whales, were fully fledged.

但其他群体，如科动物、熊和 鲸鱼，已经完全成熟。

These canids are relatively small, at about  60 cm in length and weighing just over 3kg.

这些科动物相对较小，长约 60 厘米，重量仅超过 3 公斤。

So do certain canids and crows.

某些科动物和鸦也是如此。

Their scientific name, vulpes  lagopus means hare-footed fox, as this furry pad adaptation  is unique among canids.

它们的学名 vulpes lagopus 意思是兔足狐，因为这种毛茸茸的垫子适应性在科动物中是独一无二的。

One species in this genus—Epicyon haydeni—was the biggest of the big, thought to be the largest canid of all time.

该属中的一种——伊皮西翁海登氏种——是最大的巨型，被认为是史上最大的科动物。

But around 30 million years ago, a new subfamily of canids appeared: Caninae, or canines, the true dogs.

但大约 3000 万年， 了一新的科动物亚科：Caninae，或科动物， 真正的狗。

Today there are 34 species of canids, from the leggy maned wolf to the big-eared fennec fox.

如今有34种科动物，从长腿的鬃狼到大耳的芬NE克狐。

Not everyone's convinced that Prohesperocyon was a canid, though.

并非所有人都认为“黄昏”是科动物。

The only important thing that Epicyon has in common with your golden retriever or whatever is that they're both canids.

伊皮西翁与你的金毛寻回或其他类唯一共同的重要之处在于它们都属于科。

So, the dingo is a unique Australian animal, a wild canid and an apex predator essential for the health of Australia's ecosystem.

因此，澳洲野狗是澳大利亚独有的动物、野生科动物和对澳大利亚生态系统健康至关重要的顶级捕食者。

Because, just like cats, they had fully retractable claws, a trait that canids eventually lost.

因为，就像猫一样，它们拥有完全可伸缩的爪子，这一特征科动物最终失去了。

Bovids, equids and, in particular, canids, were put to work by H.sapiens; felids always took a slightly different view of the matter, but were indulged for their rodent-catching talents.

牛科动物、马科动物，尤其是科动物，都是由智人分工的；猫科动物略有不同，但受宠的原因主要是捕捉啮齿类生物的天性。

But in canids, they're especially big, and it's thought that these extra large spaces help dogs and wolves hear low-frequency sounds.

但在科动物中， 它们特别大，人们认为这些超大空间有助于狗和狼听到低频声音。

If anything, dogs resemble juvenile rather than fully adult canids, a sort of arrested development which accounts for the way they remain dependent on their human owners throughout their lives.

如果说狗与科动物确有相似性，那么也只是像未成年而非成年科动物。这种类似发育停滞的象可以解释狗为何一生都如此依 赖主人。

Canids have hollow bony structures toward the back of their skulls called auditory bullae that protect the delicate bones of the middle ear.

科动物的头骨后部有空心的骨骼结构，称为听泡，用来保护中耳的脆弱骨头。

Now, some experts think the earliest canid was a small, weasel-like creature called Prohesperocyon, which first appeared about 36 million years ago in southern Texas.

在， 一些专家认为最早的科动物是一种类似鼬的小型生物，名为原黄昏（Prohesperocyon），它大约在3600万年首次在美国得克萨斯州南部。

One of the culprits in their decline was the third and final subfamily of canids: The Caninae, the only group of dogs that would be left standing.

它们衰落的一罪魁祸首是科中的第也是最后一亚科：亚科，唯一幸存下来的狗类群体。