Taxonomy & Related Groups comparison

Kangaroo vs Wallaby: Key Differences Explained

The short answer

The split is by size and habit, not by taxonomy. Kangaroo is used for the four largest macropods — the red, the antilopine and the two grey kangaroos — while wallaby is a loose label for dozens of smaller species scattered across several genera. There is no wallaby family. Larger kangaroos are open-country grazers with long hind feet built for fast hopping, while most wallabies are smaller browsers of scrub, forest and rock with shorter, more compact feet.

The main difference

Kangaroo and wallaby are both macropods; kangaroo names the four largest grazing species while wallaby is an informal size label covering many smaller species across several genera.

It is one of the most common Australian wildlife questions, and the honest answer is that the boundary is a convention about body size rather than a line drawn by classification — something no straight list of contrasts manages to convey.

At a glance

Comparison of Kangaroo and Wallaby across 7 dimensions, with an interpretation of each difference.
What differs	Kangaroo	Wallaby	What it means
What the name covers	Conventionally the four largest macropods: red, antilopine, eastern grey and western grey	An informal label for many smaller macropods across genera including Notamacropus, Petrogale and Wallabia	Only one of the two names comes close to a natural group, so this pair is a naming question before it is an identification one.
Body size	Large male red kangaroos can stand well over 1.5 m and weigh in the region of 85 kg	Most species fall well under 25 kg, and several weigh only a few kilograms	Size is the working rule of thumb, which is exactly why the boundary is fuzzy rather than fixed.Wallaroos occupy the middle ground and are named separately again for that reason.
Hind foot	Long, suited to efficient high-speed hopping across open ground	Shorter and more compact, suited to manoeuvring in dense cover or on rock	Foot length reflects the terrain each is built to cross rather than any ranking of ability.
Teeth and feeding	Broad grinding molars that move forward through life, suited to abrasive grass	Many species have dentition better suited to browsing leaves, shrubs and softer material	Tooth wear follows diet, and the diets follow the habitat each animal occupies.The grazer-browser split is a tendency across the family rather than a rule that holds for every species.
Habitat	Open plains, grassland and open woodland across much of mainland Australia	Scrub, forest understorey, wetland margin and rocky escarpment, including islands and New Guinea	Cover versus open ground explains most of the difference in build between the two categories.
Overall build	Longer-limbed and taller at the shoulder, with a heavy tail used as a prop	Stockier and lower-slung, with proportionally shorter forelimbs and tail	Silhouette often settles a photograph faster than trying to judge absolute size with no scale.
Grouping	Often seen in mobs on open ground, sometimes numbering dozens	More often alone or in small loose groups close to cover	Visibility in the open favours grouping, while life in cover favours dispersal.Grouping in both varies with season, food availability and disturbance.

What the name covers: KangarooConventionally the four largest macropods: red, antilopine, eastern grey and western grey
WallabyAn informal label for many smaller macropods across genera including Notamacropus, Petrogale and Wallabia
Only one of the two names comes close to a natural group, so this pair is a naming question before it is an identification one.
Body size: KangarooLarge male red kangaroos can stand well over 1.5 m and weigh in the region of 85 kg
WallabyMost species fall well under 25 kg, and several weigh only a few kilograms
Size is the working rule of thumb, which is exactly why the boundary is fuzzy rather than fixed.Wallaroos occupy the middle ground and are named separately again for that reason.
Hind foot: KangarooLong, suited to efficient high-speed hopping across open ground
WallabyShorter and more compact, suited to manoeuvring in dense cover or on rock
Foot length reflects the terrain each is built to cross rather than any ranking of ability.
Teeth and feeding: KangarooBroad grinding molars that move forward through life, suited to abrasive grass
WallabyMany species have dentition better suited to browsing leaves, shrubs and softer material
Tooth wear follows diet, and the diets follow the habitat each animal occupies.The grazer-browser split is a tendency across the family rather than a rule that holds for every species.
Habitat: KangarooOpen plains, grassland and open woodland across much of mainland Australia
WallabyScrub, forest understorey, wetland margin and rocky escarpment, including islands and New Guinea
Cover versus open ground explains most of the difference in build between the two categories.
Overall build: KangarooLonger-limbed and taller at the shoulder, with a heavy tail used as a prop
WallabyStockier and lower-slung, with proportionally shorter forelimbs and tail
Silhouette often settles a photograph faster than trying to judge absolute size with no scale.
Grouping: KangarooOften seen in mobs on open ground, sometimes numbering dozens
WallabyMore often alone or in small loose groups close to cover
Visibility in the open favours grouping, while life in cover favours dispersal.Grouping in both varies with season, food availability and disturbance.

How they are related

Both sit in the family Macropodidae, the macropods, alongside wallaroos, tree-kangaroos, pademelons and the quokka. Kangaroo is applied to the four largest species, now usually split between the genera Macropus and Osphranter after recent revisions, while wallaby is not a taxonomic unit at all: it collects smaller macropods from Notamacropus, Petrogale, Wallabia, Dorcopsis and others. Calling an animal a wallaby says something about its size and build, not about its position in a classification.

A note on naming: Wallaby is not a taxonomic category. It is an informal size label covering many species across genera including Notamacropus, Petrogale, Wallabia and Dorcopsis, while kangaroo conventionally covers four large species now usually split between Macropus and Osphranter.

Telling them apart

Size is the practical test, with proportion as the check. A large kangaroo stands tall on long hind legs with a heavy tail used as a prop, and looks stretched out. A wallaby looks compact: shorter hind feet, a lower stance and often brighter or more contrasting markings, such as the rufous shoulders of a red-necked wallaby or the banded tail of a rock-wallaby. Between the two sit the wallaroos, stocky and thickset and named separately for that reason.

Very large, long-footed, standing tall on an open plain in a loose mob: kangaroo. Small to medium, compact, shorter-footed, close to scrub, forest or rock: wallaby. If the animal is bulky and thickset but not obviously either, it may be a wallaroo, a third informal category for the intermediate species. None of these three words draws a line that classification itself recognises.

Habitat and distribution

Kangaroos are open-country animals, using grassland, saltbush plain and open woodland across most of mainland Australia, and they do well where pasture and stock water have spread. Wallabies occupy the cover that kangaroos avoid: heath, forest understorey, swamp margin and, in the case of rock-wallabies, steep boulder fields and escarpments. Several wallaby species also occur in New Guinea and on offshore islands, and a few have established introduced populations overseas.

Diet and ecological role

Both are herbivores that ferment plant material in a specialised forestomach, but they work different ends of the plant spectrum. The big kangaroos are grazers taking abrasive grasses that wear teeth down, which is why their molars move steadily forward through life and are replaced from behind. Many wallabies browse instead, taking leaves, shrubs, ferns and fallen fruit from denser vegetation. The swamp wallaby in particular is a noted browser with a diet unlike the grazing kangaroos.

Behaviour

Both hop, using the same elastic tendon mechanism that makes hopping unusually cheap at speed, and both use the tail as a fifth limb during slow pentapedal walking. Kangaroos in open country form loose mobs, shelter in shade through the heat of the day and travel long distances between feeding areas. Wallabies more often move alone or in small numbers and stay close to cover, and rock-wallabies bound across steep boulder fields on textured feet that grip stone.

Senses and adaptations

Macropods share large mobile ears that rotate independently, eyes set for a wide field of view, and a strong sense of smell. The hopping gait is the headline adaptation, since energy is stored and returned in the tendons of the hind limbs so that travel cost changes little as speed rises. Kangaroos also lick their forearms to shed heat in extreme temperatures. Rock-wallabies add specialised foot pads with a granulated surface that grips rock, which plains species do not need.

More on this topic: Animal senses and adaptations.

Lifespan and life stages

Wild figures for large kangaroos commonly fall somewhere between six and twenty years depending on species and conditions, with drought and vehicle collisions weighing heavily on survival, and captive animals living longer. Smaller wallabies are generally shorter-lived than the big kangaroos, as body size and lifespan tend to correlate across mammals. Any single number should be treated as an estimate, since it depends on species, region, season and whether the population is wild or captive.

People and these animals

Kangaroos are abundant across much of Australia and are managed under quota-based commercial and licensed programmes, and collisions with vehicles are a significant issue on rural roads. Wallaby fortunes vary far more: some species are common, others have declined sharply through habitat change and introduced predators, and several rock-wallaby populations are the subject of intensive recovery work. A number of wallaby species have also formed introduced populations outside Australia.

Keeping them: what to understand first

Wallabies, particularly the smaller species, are kept in private collections and wildlife parks in several countries, and kangaroos are kept less often. These are wild grazing and browsing mammals with specialised digestion, large space needs and strong flight responses, and rules on keeping them differ sharply between jurisdictions. Whether keeping one can be done responsibly depends on the household, applicable law, welfare capacity and long-term commitment, and those questions belong with a qualified veterinarian.

Conservation context

The category matters here. The large kangaroos are numerous and widespread, while several wallabies, particularly rock-wallabies and some island populations, are assessed as threatened and a few taxa have already been lost. Because wallaby is not a taxonomic group, no single status applies to it, and statements about wallabies in general are meaningless in conservation terms. Consult the current Red List entry for the specific species in question.

Because wallaby is not a group, no single conservation status applies to it: several rock-wallabies and island populations are of high concern while the large kangaroos are abundant. Check the current IUCN Red List entry for the individual species.

What they have in common

Both are macropod marsupials in the family Macropodidae with pouches and hopping locomotion.
Both use the same elastic tendon mechanism in the hind limbs and the tail as a fifth limb when walking slowly.
Both ferment plant food in a specialised forestomach rather than a simple stomach.
Both can hold a dormant embryo in reserve, the macropod trait known as embryonic diapause.

Key differences

Kangaroo names four specific large species, while wallaby is an informal label with no taxonomic standing.
Large kangaroos far exceed most wallabies in body mass and standing height.
Kangaroo hind feet are long for open-country travel, whereas wallaby feet are shorter and more compact.
The big kangaroos are grazers of abrasive grass, while many wallabies browse leaves and shrubs.
Kangaroos favour open plains and woodland, whereas wallabies keep to scrub, forest and rocky ground.

Where people go wrong

Treating wallaby as a taxonomic group, when it collects smaller species from several unrelated genera.
Assuming a wallaby is a juvenile kangaroo rather than an adult of a different species.
Overlooking wallaroos, the intermediate species that fit neither label comfortably.

Frequently asked questions

Is a wallaby just a baby kangaroo?

No. A young kangaroo is called a joey, and a wallaby is an adult animal of a different species. The confusion is understandable, because wallabies are smaller-bodied, but a full-grown wallaby will never become a kangaroo. Both belong to the macropod family, and wallaby is an informal label applied to smaller species across several genera rather than a name for a life stage.

Where exactly is the line between a kangaroo and a wallaby?

There is no formal line. The convention reserves kangaroo for the four largest species and applies wallaby to smaller macropods, with wallaroos filling the middle ground under a third name again. Because the distinction rests on body size and build rather than ancestry, different sources place borderline animals differently, and no classification authority defines a boundary weight or height.

Why are kangaroo hind feet so much longer than a wallaby's?

Foot length is tied to the terrain each animal uses. Long hind feet give the big kangaroos an efficient ground-covering hop suited to travelling far across open plains between patchy feed and water. Shorter, more compact feet give wallabies control and manoeuvrability in dense scrub, forest understorey and, for rock-wallabies, on broken stone. The two foot plans solve different movement problems rather than ranking one above the other.

Do kangaroos and wallabies eat the same food?

Not usually. The large kangaroos are grazers built for abrasive grasses, with molars that move forward through life to replace worn teeth. Many wallabies browse instead, taking leaves, shrubs, ferns and fallen fruit within or near cover, and the swamp wallaby is a well-known browser. The split is a tendency across the family rather than an absolute rule, and diets shift with season and drought.

Are wallabies and kangaroos in the same family?

Yes, both are macropods in the family Macropodidae, along with wallaroos, pademelons, tree-kangaroos and the quokka. That is exactly why this comparison is a naming question. Kangaroo picks out the four largest species, now usually divided between the genera Macropus and Osphranter, while wallaby scoops up smaller species from several genera without forming a coherent group of its own.

Do wallabies live outside Australia?

Yes. Several wallaby species occur naturally in New Guinea and on nearby islands, and introduced populations of red-necked and other wallabies have persisted for decades in places including New Zealand and parts of Britain. The large kangaroos, by contrast, are essentially Australian. Introduced populations usually descend from escapes or deliberate releases from collections and are managed as pests in some areas.

Read the full profiles

Sources and methodology

How this comparison is built: FaunaHub comparisons are assembled from the sourced animal profiles behind them rather than written as standalone claims. Figures such as size, mass, and lifespan are typical ranges that vary by subspecies, population, region, sex, age, and — where relevant — whether an animal lives in the wild or under human care, so they are presented as ranges rather than fixed values. Where a common name covers a group rather than a single species, the page says so instead of implying a species-to-species match. Conservation status changes over time and should be confirmed against the current IUCN Red List. Dimensions that could not be supported from the underlying profiles are omitted rather than filled in.

What this page does not do: it does not rank the two animals, predict the outcome of a confrontation, or present either one as stronger, smarter, or better. It is not veterinary, medical, first-aid, handling, capture, hunting, or pest-control guidance. For an animal in your care, or any situation involving injury, contact a qualified veterinarian, your local wildlife authority, or emergency services.

Sources and further reading

Authoritative references used for general educational context. External links open in a new tab. These sources do not endorse FaunaHub.

UniversityAnimal Diversity Web — Macropus rufogriseus (red-necked wallaby) — University of Michigan species account
ReferenceBritannica — Wallaby (family Macropodidae) — Editor-reviewed encyclopedia entry
Wildlife referenceIUCN Red List of Threatened Species — Authoritative source for current conservation status
UniversityAnimal Diversity Web — University of Michigan Museum of Zoology — Peer-edited reference accounts for animal species
ReferenceEncyclopaedia Britannica — Animals reference — Editor-reviewed encyclopedia overview entries

Last updated: 2026-08-04