One clip names both of them

1,249 views between them.

Mute Swan outweighs Eurasian otter 1.4× — 10.7 kg against 7.8 kg. Both figures are averages across males and females.

Tale of the tape

Body mass

7.81 kg

🦦 Eurasian otter · COMBINE

11 kg

🐦 Mute Swan · AVONET

Body length

0.75 m

🦦 Eurasian otter · COMBINE

no figure yet

🐦 Mute Swan

Maximum lifespan

22 yr

🦦 Eurasian otter · COMBINE

40 yr

🐦 Mute Swan · AnAge

Bars are sized against the larger of the two figures.

Animals caught on camera

Real footage of the animals on this site — hunting, fighting, and getting on with it.

Shared ancestry

The closest group they share is Tetrapoda (superclass), home to 51,389 species.

We know what their shared ancestor was, but not when it lived — no dated family tree spans both of them yet.