Southern Cassowary

Fascinating facts about the Southern Cassowary

• A single southern cassowary can sprint like a sports car, reaching up to 50 km/h (31 mph) and leap nearly 2 m (6.6 ft) straight up, thanks to its massive, claw-tipped legs. This speed lets it cross rivers, a vital edge in fragmented rainforest where road crossings and human encounters are deadly.
• The bird's casque, a bony helmet 13-20 cm (5.1-7.9 in) tall, glows under ultraviolet light, a discovery made in 2026.
• A female can weigh as much as 76 kg (168 lb), making her one of the world's heaviest birds after the ostrich. Such size gives the cassowary the muscle to crush fruit, dig for insects, and deliver a 12 cm (4.7 in) dagger-like claw that can cause serious injury.
• Cassowaries are rainforest gardeners: they swallow whole fruits and excrete viable seeds, dispersing over 200 plant species. Without these birds, many large-seeded trees would fail to regenerate, reshaping the forest composition.
• Human-fed cassowaries are far more likely to attack: a 2003 study of 221 incidents found 75 % of attacks involved birds that had been fed by people, and 71 % of those attacks were chases or charges. This shows that feeding not only endangers people but also draws birds onto roads where vehicle strikes are the leading cause of mortality.

Sources

Every fact above was checked against these pages, and kept only where one of them states it.

• Wikipedia
• Mongabay

At a glance

About the Southern Cassowary

Stepping out of the shadows of a Queensland rainforest, the southern cassowary seems assembled from different evolutionary experiments: a velociraptor's claw, an iguana's casque, and a vivid blue and red face. The world's third-largest bird and indisputably its most dangerous, the cassowary is also one of Australia's most critical seed dispersers, the only animal large enough to pass whole the fruits of dozens of rainforest trees. Without them, entire plant communities would vanish.

Southern Cassowary photographed on Feravox

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