Ostriches are famous for being the largest birds on Earth, but many people are surprised when they learn just how big these birds actually become. Their incredible size is one of the main reasons they dominate the African savanna and are so fascinating to farmers, wildlife enthusiasts, and researchers alike.
An adult ostrich typically reaches a height of 7 to 9 feet (2.1–2.7 meters) and weighs between 220 and 350 pounds (100–160 kg). With a wingspan of approximately 6.5 feet (2 meters), they are officially the largest and heaviest living birds on Earth, standing nearly 2 feet taller than the average human.
During my time working in Tanzania, I stood on the African savannah and looked up at these flightless birds, realizing just how small we humans feel beside them. Now, we’ll together explore how big ostriches get, including their height, weight, wingspan, and how their size compares to humans and other animals.
Table of Contents
The Average Size of an Adult Ostrich
Adult ostriches are massive birds that easily tower over most other animals.
On average, a fully grown ostrich can reach:
- Height: 7 to 9 feet (2.1 – 2.7 meters)
- Weight: 220 to 350 pounds (100 – 160 kg)
- Wingspan: Around 6.5 feet (2 meters)
Male ostriches are usually larger than females. A mature male can reach nearly 9 feet tall, which means an adult ostrich can actually be taller than many professional basketball players, even towering over famous giants like Gheorghe Mureșan.
Because of this enormous size, ostriches are officially recognized as the largest living bird species in the world.
How Tall Is an Ostrich Compared to Humans?
To understand how big ostriches get, it helps to compare their height to a human.
The average adult human is about 5 feet 9 inches tall (175 cm). In comparison:
- A typical ostrich stands around 8 feet tall
- That means an ostrich can be almost 2 feet taller than a person
If you stood next to a fully grown ostrich, its head would likely be well above your own.
Their long neck is responsible for much of this height. While their body is large, the neck alone can measure around 3 feet long.
How Much Does an Ostrich Weigh?
Weight is another area where ostriches stand out.
An adult ostrich typically weighs:
- 220 to 350 pounds (100–160 kg)
Male ostriches are usually heavier, sometimes exceeding 330 pounds (150 kg).
For comparison:
- The average human weighs about 180 pounds
- That means an ostrich can weigh almost twice as much as a person
Despite their size, ostriches have strong legs and powerful muscles that allow them to move quickly and efficiently.
Why Are Ostriches So Large?
The African savannas are not as peaceful as they might seem. Predators are always searching for their next meal, and ostriches have evolved several remarkable traits to survive in such a harsh environment. One of the most important is their impressive size.
1. Survival Advantage
Their large size helps them survive in open environments like the African savanna. A taller body allows them to:
- Spot predators from far away
- Intimidate potential threats
- Defend themselves using powerful kicks
2. Running Speed
Ostriches are also the fastest birds on land, capable of reaching speeds up to 43 mph (70 km/h).
Their long legs and large body provide powerful stride length, helping them outrun many predators.
3. Energy Efficiency
Being large also allows ostriches to store more energy and survive longer periods without food compared to smaller birds.
Ostrich Size Compared to Other Birds
To truly understand how big ostriches get, it helps to compare them with other well-known birds.
| Bird | Average Height | Average Weight |
|---|---|---|
| Ostrich | 7–9 ft | 220–350 lbs |
| Emu | 5–6 ft | 80–130 lbs |
| Cassowary | 5–6 ft | 85–150 lbs |
| Eagle | 2–3 ft | 10–15 lbs |
As you can see, ostriches are far larger than any other bird species.
How Big Do Ostrich Legs and Feet Get?
One of the most impressive parts of an ostrich’s body is its legs. While most birds rely on wings for survival, ostriches depend almost entirely on their powerful legs.
An adult ostrich’s legs can measure over 3 feet (about 1 meter) long, making them some of the strongest legs in the animal kingdom. These long legs are not just for size, they are essential for speed and survival in the wild.
Each leg contains powerful muscles and tendons that allow ostriches to run extremely fast and cover large distances with minimal effort.
Ostrich Feet Size
Ostriches also have unusually large feet compared to other birds.
Each foot typically measures around 8 inches (20 cm) long and has only two toes, which is unique among birds. Most birds have three or four toes.
The larger toe contains a strong claw that can grow up to 4 inches (10 cm) long. This claw acts as a defensive weapon against predators.
Why Large Legs Matter for Survival
Large legs give ostriches several advantages:
- They allow ostriches to reach speeds of over 40 mph
- They provide powerful kicks to defend against predators
- They help ostriches travel long distances across the savanna
Because ostriches cannot fly, their legs have evolved to become their primary survival tool.
How Big Are Baby Ostriches?
Baby ostriches, known as chicks, start out surprisingly small compared to adults.
At birth:
- Height: about 10 inches (25 cm)
- Weight: around 2 pounds (1 kg)
However, ostriches grow extremely quickly. Within just six months, they can reach nearly half their adult height. By the time they are about 12–14 months old, many ostriches are close to full size.
This rapid growth rate is one reason ostrich farming can be profitable. If you’re curious about raising these birds, you can read our complete ostrich farming guide to learn more about farming, care, and egg production.
How Large Are Ostrich Eggs?
Ostriches are not only the largest birds, they also produce the largest eggs in the world.
An ostrich egg typically measures:
- 6 inches long (15 cm)
- 5 inches wide (13 cm)
- Weight: around 3 pounds (1.4 kg)
One ostrich egg is roughly equal to 20–24 chicken eggs. Because of their large size, ostrich eggs are popular for cooking, art, and farming.
Can Ostriches Be Dangerous Because of Their Size?
Because ostriches are so large and powerful, they can potentially be dangerous if threatened.
Their legs are extremely strong, and a defensive kick from an ostrich can:
- Injure predators
- Break bones
- Cause serious harm
However, ostriches are generally not aggressive toward humans unless they feel threatened or are protecting their nests. Farmers who raise ostriches learn how to manage them safely and respectfully.
Final Thoughts
Ostriches are truly remarkable birds. Standing up to 9 feet tall and weighing more than 300 pounds, they are easily the largest birds alive today.
Their size helps them survive in the wild, run at incredible speeds, and dominate the landscapes where they live.
Whether you’re fascinated by wildlife or interested in ostrich farming, understanding the size of these birds is the first step in appreciating just how extraordinary they really are.
FAQ
How tall is the tallest ostrich?
The tallest ostriches can reach around 9 feet (2.7 meters) in height.
How much does a full grown ostrich weigh?
Most adult ostriches weigh between 220 and 350 pounds.
Are ostriches bigger than emus?
Yes. Ostriches are significantly larger than emus and are considered the largest bird species in the world.
How fast can an ostrich run?
Ostriches can reach speeds of up to 43 mph (70 km/h), making them the fastest birds on land.
How long are an ostrich’s legs?
An adult ostrich typically has legs that measure around 3 to 4 feet (about 1 meter) long, allowing them to run extremely fast across open terrain.
What is the wingspan of an ostrich?
Although ostriches cannot fly, their wingspan can reach about 6.5 feet (2 meters). These wings help them maintain balance while running and can also be used for courtship displays.
Are ostriches the largest birds that ever lived?
Ostriches are the largest living birds today, but some extinct bird species such as the elephant bird of Madagascar were even larger.