January 20, 2026 at 3:49 pm

Humans And Our Livestock Make Up Approximately 95% Of The Total Biomass Of Mammals In The Entire World

by Michael Levanduski

Herd of zebra

Shutterstock

When you watch a documentary on Animal Planet, it is pretty common to see absolutely massive herds of zebra, bison, deer, and other animals walking across the grounds of Africa. Next up on the channel might be showing a pod of huge blue whales being followed by hundreds of dolphins.

On top of that, you’ve undoubtedly seen plenty of deer, raccoons, squirrels, and other animals wandering wild where you live.

Based on that, it would not be surprising to think that wild animals make up a huge percentage of all the mammals in the world, but while that was once true, it is quite the opposite today.

According to a paper published in Nature Ecology & Evolution as well as one in Nature Communications, the reality is that the total biomass of humans and our livestock makes up about 95% of all the biomass of mammals in the world.

Humans at airport

Shutterstock

That’s right, even though mammals like elephants, whales, and even buffalo dwarf us in size, our sheer numbers and the fact that we breed millions of cows, pigs, sheep, and other livestock make us the undeniable dominant species on the planet.

Of course, hundreds of years ago, that was not at all the case. The number of humans has gone up dramatically over the past century, and as a part of that, we have killed or caused the deaths of millions of other animals throughout the world.

In addition to being responsible for the vast majority of the biomass in the world, humans are also by far the animal that migrates the most distance per kilogram of body weight in the world.

Cows on grass

Shutterstock

Even though many animals walk hundreds of miles each year to get to food and water, or to avoid cold winters, humans travel about 40 times more than all the other animals combined.

This is largely because we travel each day for work, plus many people make very long treks for vacation from time to time.

To say that humans have dominated this planet would be an understatement.

If you thought that was interesting, you might like to read about the mysterious “pyramids” discovered in Antarctica. What are they?

Senior Contributing Editor, Workplace & Community

Michael Levanduski is a veteran journalist and digital culture specialist with over 15 years of professional writing and research experience. While his background spans emerging technology and complex technical subjects, Michael specializes in analyzing workplace ethics, property disputes, and viral interpersonal dynamics across modern digital forums.

Since joining TwistedSifter in 2024, Michael has authored some of the publication’s most widely read coverage on corporate policy, malicious compliance, and neighborhood relations. Rather than simply aggregating online debates, he brings rigorous research, organizational context, and an empathetic editorial voice to everyday human dilemmas—transforming raw forum discussions into insightful, highly engaging narratives.

When he isn’t covering internet culture, Michael enjoys traveling, keeping up with tech trends, and spending time with his family. Connect with Michael on LinkedIn and Facebook.