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A black southern cassowary with a blue neck and helmet-like casque walking on grass.
Photo: Summerdrought, CC BY-SA 4.0, via Wikimedia Commons

Southern Cassowary

Casuarius casuarius

A huge flightless rainforest bird of New Guinea and Australia with a bony helmet, a blue-and-red neck and a dagger-like claw.

About the Southern Cassowary

Southern cassowaries, also called double-wattled cassowaries, can stand 6 feet tall and weigh 100 to 150 pounds. They live in the rainforests and savanna woodlands of New Guinea and northeastern Australia. Coarse black feathers protect them from thorns, and they can run up to 30 miles per hour through thick brush. They eat fruit, insects, eggs, frogs, fungi and carrion. They are also strong swimmers.[1]

Quick facts

Scientific name
Casuarius casuarius[1]
Size
Up to 6 feet tall.[1]
Weight
100 to 150 pounds. Females are larger.[1]
Lifespan
12 to 19 years in the wild. Around 40 in human care.[1]
Diet
Fruit, insects, eggs, frogs, fungi and carrion.[1]
Habitat
Rainforest and savanna woodland.[1]
Where it lives
New Guinea and northeastern Australia.[1]
Group life
Solitary and territorial except during breeding.[1]
Babies
3 to 5 green eggs, incubated about 60 days by the male.[1]
Conservation status
Least Concern (IUCN Red List, assessed 2018).[2]

Fun facts

  • Cassowaries can run up to 30 miles per hour and are good swimmers.[1]
  • The male, not the female, raises the chicks.[1]
  • The southern cassowary is one of the heaviest birds, second only to the ostrich.[1]

Vocabulary

casque
A hard, helmet-like crest on a bird's head.
wattle
A flap of colorful skin hanging from a bird's head or neck.
ratite
A large flightless bird with a flat breastbone, such as an ostrich, emu or cassowary.
carrion
The meat of an animal that is already dead.
incubate
To keep eggs warm until they hatch.

See it in person

Sources

  1. [1] San Francisco Zoo & Gardens. “Double-wattled Cassowary.” https://www.sfzoo.org/double-wattled-cassowary/ (accessed 2026-10-02)
  2. [2] IUCN Red List of Threatened Species. “Casuarius casuarius (Southern Cassowary).” https://www.iucnredlist.org/species/22678108/131902050 (accessed 2026-10-02)

Facts last checked 2026-10-02.

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