What kind of bird is an emu? An updated explanation of its characteristics, ecology, and habitat. Australian Animals

What kind of bird is an emu? We will explain its characteristics, ecology, and habitat. The emu, also known as a flightless bird, is very famous in Australia. It is distributed in open areas such as grasslands and sandy areas throughout Australia, and is known as one of the most famous bird species.

What is an emu? About basic status

Emu (emu) is a bird classified in the genus Emu, in the order Cassowaries and family Cassowaries. The scientific name is Dromaius novaehollandiae and the English name is 鯯鶓. The height is approximately 1.6m-2.0m, and the weight is approximately 40kg-60kg. It is the second tallest animal after the ostrich and cannot fly. Females are larger than males.

Japanese（和名）	エミュー
English（英名）	Emu
scientific name(学名)	Dromaius novaehollandiae
classification（分類）	Ave、  Casuariiformes、 Casuariidae、Dromaius  鳥綱、ヒクイドリ目、ヒクイドリ科、エミュー属
IUCN Status(保全状況)	LEAST CONCERN
Length（体長）	1.6m-2.0m
Weight（体重）	40kg-60kg

What are the roots and origins of the emu?

The roots of the emu trace back to ancient avian ancestors that lived on the supercontinent Gondwana approximately 80 million years ago. The modern emu is a large, flightless bird (ratite) native to Australia; its scientific name is Dromaius novaehollandiae.

Origins: The lineage of large Gondwanan birds

Emus belong to a group of birds known as “ratites.”

Their relatives include:

Ostriches (Africa)

Rheas (South America)

Cassowaries (Australia/New Guinea)

Kiwis (New Zealand)

The extinct moa (New Zealand)

The extinct elephant bird (Madagascar)

It was once believed that these flightless birds evolved after the breakup of Gondwana, with each group remaining on its respective continent. However, current genetic research suggests it is highly likely that they independently lost the ability to fly, evolving from ancestors that were capable of flight.

Why did they lose the ability to fly?

The ancestors of the emu were likely small, flying birds.

However, in Australia:

There were few large carnivorous mammals.

Traveling across vast distances on foot was advantageous.

Leg strength and increased body size offered greater advantages than the muscles and wings required for flight.

Consequently, they gradually lost the ability to fly.

As a result, they evolved into “giant running birds” with the following characteristics:

Height: Approx. 1.5–2 m

Weight: Approx. 40–60 kg

Running speed: Approx. 50 km/h

Extinct species related to the emu’s ancestors

Several large bird species existed in the past within the lineage that led to the modern emu. Representative examples:

Proapteryx (and other ancient lineages)

Emu-lineage birds that inhabited ancient Australia

Ancient emu-like birds

Species ranging from smaller to larger than the modern emu

Australia was also once home to the Dromornithidae (thunder birds)—a group of giant birds—but these belonged to a lineage distinct from that of the emu.

Origin of the name “Emu”

The name “emu” was given by European explorers who encountered the bird in Australia. While there are various theories regarding its etymology, it is believed to derive from an Arabic word for large birds or from a term used by the Portuguese to describe large birds (such as cassowaries) in Southeast Asia.

About classification

The following subspecies of emu exist:

• Dromaius novaehollandiae novaehollandiae
• Dromaius novaehollandiae baudinianus 
• Dromaius novaehollandiae diemenensis 
• Dromaius novaehollandiae minor

About habitat

The emu is endemic to Australia.

1. Geographic Distribution

Found throughout Australia

However, they avoid tropical rainforests, wetlands, and extremely dry deserts.

Their main distribution is as follows:

Forests and grasslands in Eastern Australia

Dry grasslands in South Australia

Open lands in Western Australia

2. Habitat

Adapted to a wide range of habitats, including open forests, grasslands, savannas, and shrubs.

Prefers to be near water sources, but can also move in search of water sources in arid areas.

Due to their wide range of movement, they live in open areas far from human settlements.

3. Behavior and Characteristics

Move alone or in small groups.

Omnivorous, feeding on grasses, fruits, and insects.

Agility to run quickly to avoid predators.

feature is? What kind of creature is it?

The emu is the second tallest bird after the ostrich, but it cannot fly. It has a rather sturdy body and is characterized by relatively long feathers that extend from the neck to the head. The feathers all over the body are grayish-brown, and there are areas where the color is peeling off or darkened. The wings are hidden in deep feathers and are almost invisible from the outside.

1. Physical Characteristics

Body Type: A large, flightless bird with a long neck and legs and an overall slender appearance.

Body Length/Weight:

Body Length: Approximately 150-190 cm

Weight: Approximately 30-60 kg

Feathers: Brown to grayish-brown, fluffy and soft.

Head/Beak: Small head, short beak.

Legs: Very long, strong, and adapted for running. They have three toes.

2. Behavior and Personality

Although they are flightless, they are very fast runners (up to approximately 50 km/h).

They are highly curious and cautious.

They sometimes live in groups, but can also act alone.

In their habitat, they forage on the ground and also visit waterside areas.

3. Biology and Abilities

Diet: Omnivorous, consuming grasses, fruits, seeds, insects, and small animals.

Reproduction: Males are responsible for incubating eggs and raising the young.

Adaptability: They have adapted to a variety of environments, including arid lands, grasslands, forests, and farmland.

4. Differences from Poultry

Larger than chickens and ostriches, they have long legs specialized for running.

They cannot fly, but use their feathers for insulation and camouflage.

They are cautious and tend to keep their distance from each other even in groups.

What is your personality like?

Emus have very calm and gentle personalities, and if you treat them kindly, they will become attached to you. However, if you mess with her, she may get angry and attack you with her beak, so be careful.

1. Basic Personality

Curious: Often interested in surrounding movements and objects

Highly alert: Sensitive to predators and suspicious noises, they quickly flee

Gentle: Usually behaves calmly in flocks

2. Sociality and Behavior

Capable of both flock and solitary behavior

Young birds and birds in food-rich areas tend to live in small flocks

May travel widely alone

Territorial: Rarely stay in a particular location for long periods, instead moving in search of food and water sources

3. Relationships with People

Wild individuals keep their distance from humans

In captivity, they are relatively docile and can become accustomed to people, but may kick when stressed or startled

Rarely aggressive, but their defensive instinct is their powerful kicking legs

4. Characteristic Behavior

Excellent at running long distances and highly alert to danger

Gentle while eating or traveling, but quickly flees when alarmed

What is the ecology like?

Emus are omnivores, subsisting on small mammals, insects, and seeds. The reproductive form is oviparous. They lay 10-30 eggs from November to April. The lifespan of an emu is said to be 20 to 30 years.

1. Activity Pattern

Diurnal, mostly active during the day

Highly mobile: Walks long distances to search for food and water

Solo or in small groups: Flexible behavior patterns change depending on food and water sources

2. Diet

Omnivorous: Eats grasses, leaves, fruits, seeds, insects, small animals, etc.

Feeding Method: Pecking at plants and insects from the ground

Diet changes depending on the season and region, consuming foods with high moisture content during dry periods

3. Breeding and Rearing

Breeding Season: Spring to Summer

Males are responsible for incubation and rearing

After the female lays eggs, the male guards the nest and incubates them for about 8 weeks

The male continues to care for the chicks after they hatch

Breeding Characteristics: The male remains largely stationary in the nest and protects the chicks while restricting food and water

4. Habitat

Adaptable to a wide range of environments, including open forests, grasslands, savannas, and shrubs.

Prefers to live near water sources, but can also live mobile in arid areas.

Requires a wide range of movement, moving in search of food and water sources.

5. Adaptability

Excellent running ability: Can escape at speeds of up to 50 km/h.

High endurance: Can travel long distances even in arid areas and grasslands.

Omnivorous and adaptable, they change their survival strategies depending on the season and region.

Are there any natural enemies?

Emu’s natural enemies include dingoes and crocodiles. Therefore, chicks in particular tend to be attacked preferentially.

Emu Molting

Molting is a natural physiological process in which emus shed old feathers and replace them with new ones. Although emus are flightless birds, their feathers play crucial roles in thermoregulation, protection against ultraviolet rays, and reproductive behavior.

Molting Once a Year

Emus generally molt about once a year. Feather replacement typically occurs after the breeding season or during periods when environmental conditions change.

While the timing varies by region and climate, in Australia, molting is primarily observed between summer and autumn.

Feathers Do Not Fall Out All at Once

While some bird species shed large amounts of feathers simultaneously, the molting process in emus proceeds relatively slowly.

Characteristics:

Feathers shed gradually, starting from the neck and body

New feathers grow in from underneath

Since there is no need to maintain flight capability, wing molting does not restrict movement

Unique Emu Feathers

Emu plumage differs slightly from that of typical birds.

Typical birds:

Barbs extend to the left and right from a single central shaft (rachis)

Emus:

A dual structure where two shafts (or branches) extend from a single base

They have a fluffy, hair-like appearance

They are well-suited for retaining body heat

This structure is an adaptation for survival in the arid Australian environment.

Changes During Molting

During the molting period, the following changes occur:

Feathers appear shaggy or unkempt

Feather color may look slightly paler

Large amounts of old feathers fall to the ground

Increased rubbing of the body and preening behavior

In a healthy emu, the plumage is restored after molting, resulting in feathers that are more vibrant and dense.

Why Do Emus Retain Their Feathers?

Even though emus are flightless, they did not lose their feathers during the course of evolution. Reasons include:

Body temperature regulation

Crucial in Australia, where there is a significant temperature difference between day and night

Protection from the sun

Dark-colored feathers absorb ultraviolet rays

Courtship behavior

Feather condition serves as an indicator of health

Keeping chicks warm

Parent birds’ plumage also aids in raising their young

Vocalizations

Emu vocalizations differ significantly from the “bird-like chirping” one might imagine based on their appearance; they are characterized by deep, resonant, and drum-like sounds.

Female Vocalizations (Loud, Deep Resonance)

Female emus produce very loud calls during the breeding season.

Characteristics:

Low-pitched sounds like “boo-boo” or “bon-bon”

Sounds that carry over long distances

Sounds that seem to vibrate the chest and throat

These sounds are said to travel up to several kilometers.

Females use these calls to:

Call to males

Assert their territory

Signal their presence to potential mates

Male Vocalizations (Low Grunts and Rumbles)

Males do not vocalize as loudly as females, but they do produce:

Low rumbling sounds

Quiet calls

Snorting or grunting sounds

They may emit warning calls, particularly when incubating eggs or raising chicks.

Chick Vocalizations

Unlike adults, emu chicks produce:

High-pitched, faint “peep-peep” sounds

“Chu-chu” calling sounds

Since chicks begin walking and following their fathers almost immediately after hatching, they use these vocalizations to communicate with their parents.

The Secret Behind the Emu’s “Drum-like Sound”

The emu’s distinctive low-pitched sounds are not produced solely by the vocal cords, as is the case with most birds.

They utilize a specialized vocal organ that vibrates the trachea (windpipe) deep in the throat, creating low-frequency sounds through air resonance.

Females, in particular, vocalize using a unique method that involves:

Extending their necks

Inflating a sac-like structure in their throat

Emitting low-frequency sounds

Seasonal Activities

Emu activity is heavily influenced by Australia’s seasonal changes (dry and wet seasons, temperature, and food availability). The seasons are the reverse of those in Japan; in the Southern Hemisphere, summer is December–February, autumn is March–May, winter is June–August, and spring is September–November.

Spring (September–November) | Peak Breeding Activity

Key behaviors:

Pair formation between males and females

Courtship displays

Territorial disputes

Mating

Spring marks the beginning of the breeding season for emus.

Females attract males through:

Low, booming calls

Neck-stretching displays

Slow, deliberate courtship walks

Diet:

As plants are actively growing, they consume large amounts of:

New shoots

Grass

Fruit

Insects

…building up the physical strength needed for breeding.

Summer (December–February) | Egg-laying and Incubation

Key behaviors:

Females lay eggs

Males begin incubation

Males enter “parenting mode”

A distinctive feature of emus is that the male incubates the eggs.

A single clutch consists of:

Approximately 5 to 15 large, green eggs

Each egg weighs about 500–700g

For about eight weeks, the male:

Barely eats

Barely moves

Guards the nest

Coping with summer heat:

Emus are adapted to hot environments and regulate their body temperature by:

Reducing activity during the day

Becoming active in the morning and evening

Utilizing shade

Autumn (March–May) | Chick Growth and Migration

Key behaviors:

Chicks grow

Males raise the young

Migration in search of food

Newly hatched chicks possess:

Striped plumage

High alertness

The ability to walk quickly

The male protects the chicks for about six months, fulfilling roles such as:

Shielding them from danger

Teaching them about food sources

Managing their movements Diet

Autumn offers an abundance of plants and insects,

seeds

grasses

fruits

small insects

and other items that make up their varied diet.

Winter (June–August) | A period focused on movement and foraging

Key behaviors

Moving in flocks

Foraging for food

Maintaining physical condition

Once the breeding season ends, emus move about relatively freely.

Characteristics:

They may form flocks ranging from a few birds to several dozen

They travel in search of water sources

They roam over vast areas

Coping with the cold

Emu feathers provide excellent insulation,

allowing them to withstand

low nighttime temperatures

and dry winds.

Walking Speed

An emu’s walking speed differs significantly between normal conditions and emergency situations (when running).

Normal Walking

Approximately 3–7 km/h

A speed comparable to a human’s slow to average walking pace

Emus typically walk slowly through vast grasslands or forests while foraging for:

grass

fruit

seeds

insects

small animals

They are capable of walking for extended periods and cover large distances in a single day.

Brisk Walking

When sensing danger or rushing to a destination,

they move at a brisk pace of approximately

10–20 km/h.

Because emus have very long legs and a long stride, they move faster than they appear to.

Running Speed

An emu’s most notable characteristic is its running ability.

Top speed: Approximately 45–50 km/h

They may appear even faster over short distances

This places them among the fastest of all large, flightless birds.

About Emu Chicks

Let’s take a look at emu (Dromaius novaehollandiae) chicks.

1. Birth

Breeding Season: Spring to Summer

Nest: Females lay eggs in shallow ground nests built by males.

Number of Eggs: Usually 8-12

Incubation Period: Eggs hatch in approximately 8 weeks.

2. Growth

Immediately After Hatchlings: Approximately 30cm in length, approximately 300g in weight

Coat Color: Light brown with black stripes, similar camouflage coloring to their parents.

Rapid Activity: Begins walking and following their parents immediately after hatching.

Growth Rate: Very fast, pecking at the same food as their parents within a few weeks of birth.

3. Relationship with Parents

Males are responsible for rearing: Caring for chicks, protecting them from danger, and providing nutritional guidance.

Population Movement: Chicks accompany their parents and learn to forage and find water sources.

Learning Period: Chicks learn survival skills by observing their parents’ behavior.

4. Independence

Independence Period: They become independent and leave their parents at approximately 6-12 months of age.

By this time, they have acquired basic skills such as foraging, escape, and social behavior.

5. Characteristics and Personality

Active and curious

Highly dependent on their male parent and highly cautious

Agile and fast, they have a high ability to escape predators.

Is the emu an endangered species?

Emu is not an endangered species. Previously, emus could be seen all over Australia. However, emus became extinct in Tasmania in the 19th century. In 1999, the emu became formally protected by the Australian government under the Environmental Protection and Biodiversity Conservation Act, making it highly protected. However, only the state of New South Wales classifies the emu as an endangered species.

1. International Status

IUCN Red List: Least Concern (LC)

Global populations are stable, and the risk of extinction is low.

2. Population and Distribution

Widely distributed throughout Australia

Adapted to a wide range of environments, including forests, grasslands, and savannas

May be found near farmland and cities

3. Threats

Few natural predators, and few direct threats from human activity

Traffic accidents on farmland and roads affect some areas

Low-scale habitat destruction, limiting population decline

Can emus be bred?

Emus are extremely difficult to keep. Because they travel long distances, they require quite a large amount of space, which limits the number of people who can keep them. It is appropriate to enter the zoo and see them at events. Please check the official website for details.

1. Legal Status

In Australia, they are protected as wild animals.

Keeping them overseas requires permission from the national or state government.

Even in Japan and other countries, keeping them is often permitted only in zoos and designated facilities.

2. Difficulties of Keeping

They are large, weighing 30-60 kg, and require a large enclosure.

They are fast runners and have good jumping ability, so their enclosure must be sturdy and high, otherwise they risk escape and injury.

They are omnivorous and eat a large amount.

They need to be fed grass, fruit, seeds, insects, etc.

Sociality: They prefer to live in groups, so keeping them alone can be stressful.

3. Actual Breeding Examples

They are often kept in zoos, farms, and research facilities.

Breeding Environment: Spacious exercise areas, sturdy fences, and water sources are required.

Professional staff are responsible for diet, health, and breeding management.

Private ownership is extremely difficult due to legal, safety, and management considerations.