Gorilla Fast Facts
Towering, powerful and surprisingly tender, silverback gorillas are among the most iconic and misunderstood animals on Earth. As the leaders and protectors of their families, these majestic primates are not only symbols of strength but also of gentleness and care. At the Dian Fossey Gorilla Fund, we work daily to protect and study these incredible animals in their natural habitat. Below are some fast facts that highlight just how extraordinary silverbacks truly are.
The Largest Primate on Earth
Silverbacks can weigh up to 400 lbs and stand between 5’5″ and 6 feet tall—making them the heaviest primates alive.
From Tiny Newborns to Towering Adults
Male gorillas are born at around 4 lbs and reach full adult size between 15 and 18 years of age.
What Makes a Silverback?
“Silverback” refers to the distinctive silver hair adult male gorillas develop—not a separate species or subspecies.
A Plant-Powered Giant
Gorillas are vegetarians, and adult males can consume up to 60 lbs of vegetation every day.
The Truth About Gentle Giants
Despite their size, silverbacks are known for their calm, tolerant nature and are often seen babysitting infants in their group.
Strength With a Purpose
A male gorilla’s strength is used not for aggression but to defend his group and compete for mates—natural predators are rare.
Legendary Displays of Power
Chest beating, branch throwing, and charging are dramatic displays silverbacks use to show dominance and size.
A Signal You Can Hear for a Kilometer
The iconic chest beat of a silverback can be heard up to a kilometer away, with its deep frequency revealing the male’s size.
The Silverback Leads the Way
The dominant silverback guides the group’s movements and activities, in addition to offering protection.
Lifespan in the Wild and in Care
Male gorillas can live into their late 30s in the wild, and in protected environments, some have reached their 60s.
On the Brink: Critically Endangered
Gorillas are classified as critically endangered—just one step away from extinction—underscoring the urgency of our conservation work.
Silverback gorillas are awe-inspiring not just because of their size and strength, but because of the deep social bonds, intelligence and gentleness they display. Each fact above is a reminder of just how remarkable – and vulnerable – these animals are. As one of our closest relatives in the animal kingdom, their future is tied to our actions. At the Dian Fossey Gorilla Fund, we are committed to protecting silverbacks and their families every day. Join us in ensuring that future generations will continue to marvel at these gentle giants in the wild where they belong.
