One clip names both of them

74,300 views between them.

Capybara outweighs Guinea pig 71× — 51.6 kg against 0.7 kg.

Tale of the tape

Body mass

52 kg

🐹 Capybara · COMBINE

0.73 kg

🐭 Guinea pig · AnAge

Shoulder height

0.57 m

🐹 Capybara

no figure yet

🐭 Guinea pig

Body length

1.25 m

🐹 Capybara · COMBINE

no figure yet

🐭 Guinea pig

Maximum lifespan

15 yr

🐹 Capybara · COMBINE

12 yr

🐭 Guinea pig · 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 Hystricomorpha (suborder), home to 353 species.

They last shared an ancestor about 17 million years ago.

Estimates range from 15 to 21 million years; the figure above is the middle estimate.

About this estimate

Dates from Upham, Esselstyn & Jetz 2019, PLoS Biology 17:e3000494 (CC0).