Cassowary Speed: How Fast Can These Giant Birds Run?

Written by Rebecca Bales
Updated: September 30, 2022
Share on:


Key Points

  • Cassowaries can run up to 31 miles per hour (50 km).
  • An ostrich can maintain speeds equivalent to a cassowaries top speed for miles of range.
  • Emus top speed is often listed about about 30 miles per hour.

Everyone knows ostriches are speedsters, but are they the fastest bird? Another large, flightless bird is the cassowary. Unlike ostriches, which live in wide-open savannas and deserts, cassowaries live in dense forests less ideal for sprinting. Yet, the speed and athleticism of cassowaries might surprise you.

Let’s dig into the speed of cassowaries. Just how fast can they run, and is it faster than an ostrich?

How Fast Can a Cassowary Run?

Cassowaries are one of nature’s most incredible athletes!

43,614 People Couldn't Ace This Quiz

Think You Can?

©Jim Kuhn, CC BY 2.0, via Wikimedia Commons – License

Cassowaries live in dense rainforests, which is a difficult environment to run in. Yet, cassowaries have several adaptations that allow them to maneuver through forests at surprising speeds.

These huge birds cannot fly, but their very powerful legs allow them to run at high speeds. They are very strong swimmers and can move rather quickly on both land and water. If you happen to find a cassowary, back away slowly and put something between you and the bird because they can be very dangerous.

  • Their “helmet”: Look at the picture of the cassowary above, the “helmet” on top of its head is actually known as a casque. The casque of a cassowary can measure up to 7 inches long. It’s also hard, as its primarily made up of the same substance as rhino horns, keratin. Casques serve a functional purpose, as cassowaries run through dense forests they lower their head and the casque clears a path through branches and other vegetation.
  • Incredibly strong legs: Move over LeBron James, there’s a new high jumping athlete! Cassowaries can jump 7 feet in the air from a standstill, high enough for a full grown adult to walk underneath them. These incredibly powerful legs help propel cassowaries to impressive speeds.

Thanks to these adaptations cassowaries can run up to 31 miles per hour (50 km). How does that top speed compare to other large birds?

Cassowary Speed Vs. Ostrich Speed

Ostrich (Struthio Camelus) running across the savanna

©paula french/

Cassowaries are impressive birds, but can they outrun an ostrich? The short answer is no. Ostriches are the fastest birds in the world and can reach 45 miles per hour (70 km) in sprints. More impressively, an ostrich can maintain speeds equivalent to a cassowaries top speed for miles of range.

Cassowaries are also topped by another large flightless bird native to Australia, the emu. With a habitat that includes deserts and shrub plains, the environment of emus is conducive to more sprints away from predators and threats. While an emus top speed is often listed about about 30 miles per hour, its likely they could outrun a cassowary as well in a race.

It’s notable that large, flightless bird species like the ostrich, emu, and cassowary survive today while larger flightless birds that were slower like the elephant bird and moa went extinct. We can likely thank the cassowaries remote habitat and speedy evasiveness for its continuing survival when first confronted with human hunters!

Cassowary Speed - Flightless Birds

Flightless birds ranging from the


bird to the emu.

©Nicolas Primola/

Next Up…

The photo featured at the top of this post is © Kensho Photographic/

Share on:
About the Author

Rebecca is an experienced Professional Freelancer with nearly a decade of expertise in writing SEO Content, Digital Illustrations, and Graphic Design. When not engrossed in her creative endeavors, Rebecca dedicates her time to cycling and filming her nature adventures. When not focused on her passion for creating and crafting optimized materials, she harbors a deep fascination and love for cats, jumping spiders, and pet rats.

Thank you for reading! Have some feedback for us? Contact the AZ Animals editorial team.