🦫
Canadian beaver
Castor canadensis
Mammals · Least concern
vs
🦦
Eurasian otter
Lutra lutra
Carnivores · Near threatened
4 clips name both of them
5.2 million views between them.
Canadian beaver outweighs Eurasian otter 2.6× — 19.9 kg against 7.8 kg.
Tale of the tape
Body mass
20 kg
🦫 Canadian beaver · COMBINE
7.81 kg
🦦 Eurasian otter · COMBINE
Body length
0.78 m
🦫 Canadian beaver · COMBINE
0.75 m
🦦 Eurasian otter · COMBINE
Maximum lifespan
23 yr
🦫 Canadian beaver · COMBINE
22 yr
🦦 Eurasian otter · COMBINE
Bars are sized against the larger of the two figures.
镜头下的动物
站内动物的实拍影像——捕猎、打斗，还有各自过日子的样子。
Shared ancestry
The closest group they share is Theria (subclass), home to 9,319 species.
They last shared an ancestor about 81 million years ago.
Estimates range from 74 to 89 million years; the figure above is the middle estimate.
About this estimate
Dates from Upham, Esselstyn & Jetz 2019, PLoS Biology 17:e3000494 (CC0).