Animal
Southern cassowary
The southern cassowary is a huge bird that cannot fly. It has a blue neck and a tall helmet. It eats fruit in the rainforest.
The southern cassowary is a large flightless bird of the rainforests of northern Australia and New Guinea. It has a vivid blue neck, red wattles and a tall helmet called a casque. By eating fallen fruit and spreading the seeds in its droppings, it helps the rainforest grow. Cassowaries are wild and strong, so people watch them from a safe distance.
Casuarius casuarius is a solitary ratite of tropical rainforest in northeastern Queensland, New Guinea and nearby Indonesian islands. A frugivore with more than 238 plant species recorded in its diet, it spreads rainforest seeds and is known as a rainforest gardener. Globally it is Least Concern (IUCN, 2018), but the Australian population is listed as Endangered, threatened by habitat loss, vehicle strikes and dogs.
Photo: Donald Davesne, CC BY 4.0, via Wikimedia Commons
Meet the southern cassowary
The southern cassowary is a very big bird. It cannot fly.
It has black, hairy-looking feathers, a bright blue neck and two red flaps of skin. On its head is a tall helmet.
The southern cassowary is a huge bird that cannot fly. It can stand up to 2 meters tall, taller than most grown-ups, and a female can weigh up to 76 kilograms. Females are usually bigger and brighter than males.
Its body is covered in coarse black feathers that look more like hair. The skin of its head and neck is bright blue, two long red flaps called wattles hang from its neck, and on top of its head sits a tall, grayish helmet called a casque.
Casuarius casuarius is a large ratite in the family Casuariidae, which it shares with the emu. Adults stand about 1.5 to 2 meters tall; the Queensland government gives weights of up to 76 kilograms for females and 55 kilograms for males, and the Australian Museum notes that females are generally larger, taller-casqued and brighter.
Distinctive features include coarse, black, hair-like body feathers, bare blue skin on the head and fore-neck, long drooping red wattles, a gray casque, wing stubs carrying a few long modified quills, no tail feathers, and muscular legs with three toes, the inner one bearing a claw up to 120 millimeters long.
Quick facts
- Group
- Bird
- Height
- 1.5 to 2 m
- Weight
- up to 76 kg
Where it lives
Southern cassowaries live in thick, green rainforests.
They live in the north of Australia and on the island of New Guinea. They like forests with lots of fruit trees.
Southern cassowaries live in dense tropical rainforests and woodlands that have lots of different fruiting trees. In Australia they are found only in the far north of Queensland, and outside Australia they live in Papua New Guinea, eastern Indonesia and some nearby islands.
In Queensland there are three populations left: one in the Wet Tropics, between Cooktown and the Paluma Range, and two on Cape York Peninsula. When Europeans arrived, they lived in rainforests all the way from north of Townsville to the tip of Cape York.
The IUCN's 2018 global assessment lists the species as resident in Australia, Indonesia and Papua New Guinea. In Australia, the Queensland government describes three remaining populations: the Wet Tropics (Cooktown to the Paluma Range) and two on Cape York, in the vine forests of the McIlwraith and Iron Ranges and north of Shelburne Bay.
At European settlement the species occupied rainforest from north of Townsville to the tip of Cape York. Land clearing for farming, towns and other development has reduced both habitat and numbers, although about 89 percent of the remaining essential habitat in the Wet Tropics is now within protected areas.
Continent
Did you know?
Cassowary chicks have yellow and black stripes.
Cassowary chicks are striped yellow and black, while young birds are browner and duller than their parents.
Chicks are striped yellow and black; juveniles are browner with duller heads and necks before gaining adult colors.
Where can you find this animal?
- Lives here naturally · Countries and seas named by a scientific source
- Sightings recorded · Records of wild sightings (GBIF)
Lives here naturally · Countries and seas named by a scientific source
Tropical rainforest of far northeastern Queensland (the Wet Tropics and Cape York Peninsula), New Guinea and nearby islands of eastern Indonesia. In Australia and Indonesia only a small part of the country is meant.
Places: Australia, Papua New Guinea and Indonesia.
Source: iucn-red-list · checked October 2026
Sightings recorded · Records of wild sightings (GBIF)
Counts of GBIF records of wild observations (human and machine) and preserved specimens. Records include introduced populations, vagrants, escaped or released animals and misidentifications, so a country with records is not necessarily part of the native range.
Wild sightings have been recorded in Australia, Indonesia, Papua New Guinea, United States, DR Congo, Germany, Colombia, Spain and 5 more places.
Source: gbif · checked October 2026
Range maps show where scientists say an animal lives, often country by country. An animal may live in only part of a country shown, and sightings records can include animals that wandered far from home.
The rainforest gardener
Cassowaries eat fruit that falls from the trees.
The seeds come out in their poop, far away. New trees grow from them. Cassowaries help plant the forest!
Cassowaries mostly eat fruit that has fallen to the ground. They also eat fungi, plants, insects, snails and small dead animals. Scientists have recorded more than 238 kinds of plants in their diet, including many that are poisonous to people, but the cassowary's gut can deal with the poisons.
They carry the seeds away and drop them in big piles of dung, which works like ready-made fertilizer. That is why the cassowary is called a rainforest gardener.
Southern cassowaries feed mainly on fallen fruit, supplemented with fungi, plants, insects, snails and small dead mammals. The Queensland government has recorded over 238 plant species in the diet, many toxic to humans, which the birds' digestive system is adapted to handle.
Some rainforest seeds are so large that, according to the Queensland government, no other animal can swallow and disperse them, and some germinate better after passing through the cassowary's gut. Scats can hold hundreds or thousands of seeds, and white-tailed rats, bush rats, melomys and musky rat-kangaroos that feed on seeds in the droppings spread them further.
Did you know?
Cassowaries can eat fruit that would make people sick.
Many fruits cassowaries eat are poisonous to people, but their gut can handle the poison. So never eat something just because a cassowary does!
The diet includes many species toxic to humans; the cassowary's digestive system is adapted to deal with these toxins.
Helmet, feathers and feet
The cassowary's helmet is called a casque.
It keeps growing all its life. Its strong legs have three toes. Its feathers look like long black hair.
Nobody knows for sure what the cassowary's tall casque is for. It keeps growing throughout the bird's life, so it may show how old and important a cassowary is. It might also help cassowaries sense the deep, rumbling sounds other cassowaries make. Inside, it is spongy, not solid bone.
Tough skin and bristly feathers protect the bird as it pushes through spiny rainforest plants. Each strong leg has three toes, and the inner toe has a long, sharp claw.
The casque's function is unknown. The Queensland government suggests it may signal dominance and age, since it grows throughout life; may help the bird detect the low-frequency sounds of other cassowaries; and, being spongy rather than bony inside, may cushion the head as the bird pushes through dense thickets.
The Australian Museum notes that tough skin and bristle-like feathers protect against spiny vegetation and the kicks of other cassowaries. The wings are reduced to stubs carrying a few long, curved quills, and there are no tail feathers. The inner of the three toes carries a dagger-shaped claw of up to 120 millimeters.
Dads raise the chicks
The mother lays big green eggs. Then the dad does all the work!
He keeps the eggs warm and looks after the stripy chicks. He shows them where to find fruit and water.
From June to October, a female lays 3 to 5 large, olive-green eggs in a shallow scrape on the ground lined with plants. Then she leaves, and may lay eggs with another male. The male sits on the eggs for about 50 days.
The chicks have yellow and black stripes. Their dad guards them and leads them to fruit trees and water in his territory. When they are 8 to 18 months old he chases them away to live on their own, and they are grown up at about 3 years.
Adults meet mainly during the breeding season, from May to November, and a female may mate with several males. Between June and October she lays 3 to 5 olive-green eggs in a scrape lined with plant material and leaves the male to incubate them for about 50 days.
The male guards the yellow-and-black striped chicks and, using his good memory of the area, leads them to water and fruiting trees within his territory. Young birds are browner and duller than adults; they become independent at 8 to 18 months, when the male drives them off, and mature at about 3 years.
A shy bird that lives alone
Cassowaries like to live alone. They are shy and hard to find.
You may hear them before you see them. They make deep, rumbly sounds.
Southern cassowaries live alone, each in its own home area of about half a square kilometer to more than two square kilometers. A female's area usually overlaps with the areas of several males.
They are shy and secretive, so they are hard to spot in the thick forest. You may hear their deep rumbles and grunts long before you see one. If two males meet, they stand tall, fluff up their feathers and rumble until one walks away.
The southern cassowary is solitary, occupying a home range of about 0.52 to 2.35 square kilometers that shifts with season and food supply; a female's range usually overlaps those of several males. Calls are rumbles and grunts, often given when the bird sees possible danger.
The Australian Museum describes encounters between males as stand-offs, both birds standing tall, fluffing their feathers and rumbling until one retreats. When a male and female meet, the male moves away, as the female is dominant.
Did you know?
Cassowary dads take care of the eggs and chicks.
Male cassowaries keep the eggs warm for about 50 days and then raise the chicks alone.
Incubation (about 50 days) and chick rearing are done entirely by the male, while the female may breed again with another male.
People and cassowaries
Cassowaries are important to the First Nations people of northern Australia.
They have many names for this bird. One name is goondoi.
The Queensland government describes the southern cassowary as a significant species to First Nations peoples, who know it by many different words. It is called goondoi in Djiru Country and gumbugan in Mamu Country in the Wet Tropics, and kutini on Kuuku Ya'u Country and wadthuuny on Gudang Yadhaykenu Country on Cape York.
Today many people who live near cassowaries help protect them, by planting rainforest, caring for injured birds and teaching visitors how to stay safe around them.
The Queensland government notes that the southern cassowary is a significant species to First Nations peoples and lists some of its many names: goondoi (Djiru Country) and gumbugan (Mamu Country) in the Wet Tropics, and kutini (Kuuku Ya'u Country) and wadthuuny (Gudang Yadhaykenu Country) on Cape York.
The national recovery effort is coordinated by the Cassowary Recovery Team, whose members include Traditional Owners, local, state and national governments, conservation and community groups, universities and vets. Community groups run rehabilitation facilities, plant wildlife corridors and campaign on dog and road safety.
Did you know?
The cassowary's helmet is spongy inside.
A cassowary's casque is spongy inside, not solid bone, and nobody knows for sure what it is for.
The casque has a spongy interior; ideas about its role include signaling, sound detection and protecting the head.
Keeping cassowaries safe
There are not many cassowaries in Australia.
Cars, dogs and lost forest can hurt them. People drive slowly and plant new trees. We never feed cassowaries, and we watch them from far away.
Around the world the southern cassowary is listed as Least Concern, but in Australia it is Endangered. Scientists estimated in 2014 that up to 4,400 cassowaries lived in the Wet Tropics. Its dangers include lost forest, cars and dogs.
Cassowaries are strong wild animals. If one is cornered, it can kick hard enough to break bones, so the safe thing is to give it space. People should never feed cassowaries, never get between a chick and its dad, keep dogs on a leash and slow down when driving.
The IUCN's 2018 global assessment lists Casuarius casuarius as Least Concern, with an estimated 20,000 to 49,999 mature individuals and a decreasing trend. In Australia it is Endangered under the national EPBC Act; Queensland lists the Wet Tropics population as Endangered and the Cape York populations as Vulnerable. A 2014 CSIRO survey estimated up to 4,400 birds in the Wet Tropics.
Threats named by the Queensland government are habitat loss and fragmentation, vehicle strikes, dogs and pigs, and cyclones. Feeding cassowaries is illegal and has led to cassowary deaths. Responses include habitat mapping, road signs, rehabilitation centers and research into counting cassowaries from DNA in their droppings.
IUCN Red List
How is the southern cassowary doing in the wild?
- Least Concern (this animal)
- Near Threatened
- Vulnerable
- Endangered
- Critically Endangered
- Extinct in the Wild
- Extinct
Least Concern
Not at risk of disappearing from the wild right now.
See the IUCN Red List assessment · The IUCN Red List of Threatened Species 2021.3
Amazing facts
-
Cassowary chicks have yellow and black stripes.
Cassowary chicks are striped yellow and black, while young birds are browner and duller than their parents.
Chicks are striped yellow and black; juveniles are browner with duller heads and necks before gaining adult colors.
-
Cassowaries can eat fruit that would make people sick.
Many fruits cassowaries eat are poisonous to people, but their gut can handle the poison. So never eat something just because a cassowary does!
The diet includes many species toxic to humans; the cassowary's digestive system is adapted to deal with these toxins.
-
The cassowary's helmet is spongy inside.
A cassowary's casque is spongy inside, not solid bone, and nobody knows for sure what it is for.
The casque has a spongy interior; ideas about its role include signaling, sound detection and protecting the head.
-
Cassowary dads take care of the eggs and chicks.
Male cassowaries keep the eggs warm for about 50 days and then raise the chicks alone.
Incubation (about 50 days) and chick rearing are done entirely by the male, while the female may breed again with another male.
Words to know
- casque
- a hard, helmet-like crest on the head of some birds
- wattle
- a flap of bare skin hanging from a bird's head or neck
- flightless
- not able to fly
- seed disperser
- an animal that carries seeds away from the plant they came from
- solitary
- living alone rather than in a group
- endangered
- at risk of disappearing from the wild
Discovery challenge
-
Who keeps the cassowary eggs warm?
Which parent keeps cassowary eggs warm and raises the chicks?
Which parent incubates the eggs and cares for the chicks?
- The mother
- The father
- Both, taking turns
Show the answer
The father
The dad keeps the eggs warm and looks after the chicks.
The male keeps the eggs warm for about 50 days, then raises the chicks.
Incubation and chick care are by the male alone; the female may go on to breed with another male.
-
What do cassowaries mostly eat?
What is the southern cassowary's main food?
Which food makes up most of the southern cassowary's diet?
- Fish
- Fallen fruit
- Grass
Show the answer
Fallen fruit
They eat fruit that falls from the trees.
They mostly eat fallen fruit, and spread the seeds in their dung.
Mainly fallen fruit, supplemented with fungi, plants, insects, snails and small dead mammals.
-
What is the helmet on a cassowary's head called?
What is the name of the tall helmet on a cassowary's head?
What is the cassowary's head crest called?
- A casque
- A crown
- A beak
Show the answer
A casque
It is called a casque.
The casque keeps growing throughout the bird's life and is spongy inside.
The casque is spongy inside; its function is still unknown.
-
What should you do if you see a cassowary?
What is the safe thing to do when you see a wild cassowary?
What does the Queensland government advise when you meet a cassowary?
- Feed it some fruit
- Watch it from far away
- Walk up close for a photo
Show the answer
Watch it from far away
Watch from far away, and never feed it.
Give it plenty of space and never feed it. Feeding cassowaries is illegal and harms them.
Observe from a safe distance, never approach or feed cassowaries, and never come between a chick and its father.
Places where you might see it
Experiments to try
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For parents & teachers
What children will learn
- Describe the southern cassowary's casque, wattles, feathers and legs.
- Explain how cassowaries spread rainforest seeds.
- Describe how the male cassowary raises the chicks.
- Explain why the species is Endangered in Australia and how to behave safely near wild cassowaries.
Recommended ages: 3 to 17 · About 15 minutes
Talk about it
- What might happen to a rainforest if its biggest seed disperser disappeared?
- Why is it unsafe, for people and for cassowaries, to feed wild animals?
- Scientists are not sure what the casque is for. How could they test one of their ideas?
Try at home or in class
- Mark 2 meters on a wall with tape and stand beside it to see how tall a cassowary can be.
- Plant a few seeds from a fruit you have eaten in a pot of soil, and talk about how animals help seeds travel.
Key vocabulary: casque, wattle, flightless, seed disperser, solitary, endangered
Where these facts come from
- The IUCN Red List of Threatened Species , International Union for Conservation of Nature (IUCN terms of use (no redistribution of Red List data or range maps))
- GBIF Backbone Taxonomy and GBIF Occurrence Search , Global Biodiversity Information Facility (CC0 1.0 (backbone); occurrence counts are facts derived from records under CC0, CC BY and CC BY-NC)
- Wikidata , Wikimedia Foundation (CC0 1.0)
- Casuarius casuarius (Southern Cassowary), Red List global assessment 2018 , IUCN Red List of Threatened Species
- Cultivating safe spaces for threatened southern cassowaries , Queensland Government
- Southern Cassowary , Australian Museum
- Wikimedia Commons , Wikimedia Foundation (Per file: Public domain, CC0, CC BY or CC BY-SA only (credited on each page))
Checked, not yet human-reviewed. Last updated October 27, 2026. Spotted a mistake? Tell us.