One clip names both of them

10 views between them.

Great Cormorant outweighs Grey Heron 1.8× — 2.5 kg against 1.4 kg. Both figures are averages across males and females.

Tale of the tape

Body mass

2.53 kg

🐦 Great Cormorant · AVONET

1.44 kg

🐦 Grey Heron · AVONET

Body length

1.01 m

🐦 Great Cormorant · SeaLifeBase

no figure yet

🐦 Grey Heron

Maximum lifespan

32 yr

🐦 Great Cormorant · AnAge

38 yr

🐦 Grey Heron · 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 Aves (class), home to 18,988 species.

They last shared an ancestor about 72 million years ago.

Estimates range from 66 to 80 million years; the figure above is the middle estimate.

About this estimate

Dates from Jetz, Thomas, Joy, Hartmann & Mooers 2012, Nature 491:444 (CC0).