B
Species Profile

Budgerigar

Melopsittacus undulatus

Tiny nomad parrot, big personality
RHJPhtotoandilustration/Shutterstock.com

Budgerigar Distribution

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Endemic Species
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Found in 1 country

Budgerigar or common parakeet

At a Glance

Wild Species
Also Known As Budgie, Grass parakeet
Diet Granivore
Activity Diurnal+
Lifespan 5 years
Weight 0.045 lbs
Status Not Evaluated
Did You Know?

Wild budgerigars are typically ~18 cm long and ~0.03-0.04 kg in mass; many pet strains are bred slightly larger/heavier.

Scientific Classification

The budgerigar is a small Australian parrot widely kept as a companion bird; wild-type birds are predominantly green and yellow with black barring, while captive breeding has produced many color morphs.

Kingdom
Animalia
Phylum
Chordata
Class
Aves
Order
Psittaciformes
Family
Psittaculidae
Genus
Melopsittacus
Species
Melopsittacus undulatus

Distinguishing Features

  • Small, long-tailed parrot (~18 cm) with slender build
  • Wild-type plumage: green body, yellow head, black scalloped barring on back/wings
  • Often shows blue cheek patches and black throat spots
  • Cere (fleshy area above beak) color differs by sex in adults (commonly blue in males, tan/brown in females)

Physical Measurements

Length
7 in (7 in – 8 in)
Weight
0 lbs (0 lbs – 0 lbs)
Tail Length
3 in (3 in – 4 in)
Top Speed
28 mph
About 45 km/h (estimate)

Appearance

Primary Colors
Secondary Colors
Skin Type Feathered avian integument; keratin beak and claws; legs/feet with scaly skin typical of parrots (zygodactyl feet: 2 toes forward, 2 back).
Distinctive Features
  • Small Australian parrot (Psittaculidae) with long, tapered tail; typical adult total length about 18 cm (including tail) (commonly reported in standard ornithological references such as Juniper & Parr, 1998; Forshaw).
  • Lightweight build; mass commonly ~0.03-0.04 kg in adults (values widely reported in avicultural/veterinary summaries and species accounts; variation occurs by sex, condition, and domestication strain).
  • Nomadic, flocking seed-eater in arid/semi-arid Australia; bill adapted for husking grass seeds; frequently forms large flocks and moves in response to rainfall/seed availability (documented in multiple Australian field accounts and HBW species treatment).
  • Characteristic black throat spots and blue cheek patches (wild-type), aiding visual signaling at close range.
  • Cere (fleshy area above the beak) is prominent and changes color with sex, age, and breeding condition-key field/companion-bird identifier.
  • Wings show strong barring with pale edging; in flight, long pointed wings and a slim, darting profile typical of small parrots.

Sexual Dimorphism

For budgerigars (Melopsittacus undulatus), male and female differences show mainly in the cere color, which changes with age and breeding. Young birds of both sexes look similar; adults show clearer cere differences used for identification.

  • Adult male typically has a bright to deep blue cere (wild-type/most common phenotypes); in some captive color mutations, males may show pink/purplish cere rather than blue due to genetic effects on pigmentation.
  • Often shows a more uniformly vivid cere color outside of breeding condition compared with females (context-dependent; varies with mutation and age).
  • Adult female typically has a pale whitish/cream to tan cere when not in breeding condition, often turning tan-to-brown and sometimes crusty in breeding condition (a common physiological change used for sexing in the species).
  • Outside breeding condition, the female cere frequently shows lighter coloration with whitish rings around the nares compared with males (most evident in wild-type/standard phenotypes).

Did You Know?

Wild budgerigars are typically ~18 cm long and ~0.03-0.04 kg in mass; many pet strains are bred slightly larger/heavier.

They're nomadic: wild flocks track rainfall and seeding grasses across Australia's arid and semi-arid zones.

Typical clutch size is 4-6 eggs; incubation is ~18 days, and chicks usually fledge at ~30-35 days.

Budgerigars are vocal learners (like other parrots) and can mimic human speech and household sounds with practice.

Their feet are zygodactyl (2 toes forward, 2 back), improving grip for climbing and holding food.

The wild-type "green/yellow with black barring" pattern is only one look-selective breeding has produced dozens of established color varieties (e.g., blue series, lutino, pied, albino).

Unique Adaptations

  • Efficient seed processing: a strong, hooked bill husks seeds; the muscular gizzard grinds them-well-suited to a largely granivorous diet.
  • Rapid, agile flight: long pointed wings and flock coordination support quick commuting between sparse food/water sources in open habitats.
  • Color/vision adaptations: parrots (including budgerigars) have tetrachromatic vision with UV sensitivity, aiding social signaling and foraging discrimination.
  • Water and heat coping strategy: nomadism lets them exploit short-lived booms in grass seeding after rain, avoiding prolonged resource-poor periods.
  • Zygodactyl feet + strong grip: improves climbing on branches, bark, and cage bars; also enables "hand-like" food handling.

Interesting Behaviors

  • Nomadic flocking: wild birds form fast-moving flocks that shift with food availability; flock cohesion is maintained with constant contact calls.
  • Pair-bonding and allopreening: mated pairs often preen each other and remain closely associated within the flock.
  • Cavity nesting: females nest in tree hollows (often eucalypts), spending long periods inside while males provision them.
  • Social feeding: birds feed in groups on grass seeds, often dropping to the ground to forage and then lifting off as a coordinated flock when alarmed.
  • Vocal learning and mimicry: juveniles learn calls from their social group; pet budgerigars can learn repeated words/phrases through social reinforcement.
  • Beak-and-foot manipulation: like many psittaciforms, they use the beak as a "third limb" while climbing and can hold/rotate food with one foot.

Cultural Significance

Budgerigar (Melopsittacus undulatus) are popular pet parrots that shaped pet-bird clubs, shows, and color breeding. Scientists study their song learning, hearing, and sight. Introduced to Europe in the 1800s; Australian export limits led to captive-bred "fancy" varieties.

Myths & Legends

Name origin as cultural folklore: "budgerigar" is widely reported to derive from an Aboriginal language term (often given as from Gamilaraay/Yuwaalaraay), commonly glossed as meaning "good food"/"good to eat," reflecting traditional relationships with local fauna.

19th-century avicultural lore: early European keepers sometimes repeated the belief that the birds' happiness required constant companionship-fueling the long-standing custom of keeping budgerigars in pairs (a husbandry practice that became a cultural "rule" among fanciers).

In colonial times, bird keepers told 'miracle' stories of keeping desert parrots alive on long sea trips. These tales built the budgerigar's image as a tough, adaptable small parrot and made it very popular.

Conservation Status

NE Not Evaluated

Has not yet been evaluated against the criteria.

Population Stable

Life Cycle

Birth 5 chicks
Lifespan 5 years

Lifespan

In the Wild
3–10 years
In Captivity
5–20 years

Reproduction

Mating System Monogamy
Social Structure Socially Monogamous
Breeding Pattern Long Term
Fertilization Internal Fertilization
Birth Type Internal_fertilization

Budgerigar (Melopsittacus undulatus) are socially monogamous: pairs form strong bonds and breed after rain in cavities. Both parents care. Clutch 4 to 6 eggs; incubation 17 to 18 days; fledging 30 to 35 days. Captive life 10 to 15 years.

Behavior & Ecology

Social Flock Group: 50
Activity Diurnal, Matutinal, Vespertine
Diet Granivore Ripening/soft grass seeds from freshly seeding native grasses (particularly spinifex and other arid-zone Poaceae)

Temperament

Highly social/gregarious; strong flock cohesion and frequent close-contact behaviors (allopreening, social play in captivity)
Generally non-territorial outside the nest site; flock movement and foraging are cooperative/contagious rather than defended (Higgins 1999)
Nomadic and opportunistic, tracking seed availability driven by rainfall; rapid fission-fusion grouping common (Wyndham 1980; Higgins 1999)
In captivity: often tolerant and affiliative with conspecifics when housed appropriately; can show social stress if isolated (widely reported in avicultural/veterinary literature; consistent with obligate flocking ecology)

Communication

Contact calls used to maintain flock cohesion and pair proximity; budgerigars exhibit vocal learning and convergence within social groups Farabaugh et al. 1994; representative work in the budgerigar vocal-learning model
Alarm calls Short, sharper calls) that prompt rapid flock take-off and tight aggregation (Higgins 1999
Complex warbling/chattering sequences common in social settings; in captivity especially frequent during affiliative interaction and courtship Higgins 1999
Visual signaling: posture/orientation, head-bobbing, wing/feather positioning; courtship displays occur within flocks Higgins 1999
Tactile communication: allopreening Especially head/neck), bill-touching, and courtship feeding that reinforce pair bonds and social tolerance (Higgins 1999
Coordinated flock movement: rapid, synchronized flight and collective turns function as group-level signaling in response to predators and resource shifts Wyndham 1980; Higgins 1999

Habitat

Biomes:
Desert Hot Savanna Temperate Grassland
Terrain:
Plains Plateau Valley Riverine Sandy Rocky
Elevation: Up to 3937 ft

Ecological Role

Nomadic arid-zone granivore that exploits rainfall-driven grass seeding pulses; functions mainly as a seed predator and an important mid-trophic prey item for raptors and other predators.

Regulates local grass/forb seed banks through intense, flock-based seed predation during seeding pulses Contributes to nutrient cycling and localized soil enrichment via droppings at feeding and watering aggregation sites Supports food webs as abundant prey for avian predators (e.g., falcons, hawks) in inland Australian ecosystems Potentially minor, incidental seed movement (short-distance) via handling and spillage while feeding, though most consumed seeds are destroyed

Diet Details

Other Foods:
Native Australian grass seeds Seed heads of tussock grasses Seeds of herbaceous plants Cereal grains Unripe grass seeds

Human Interaction

Domestication Status

Domesticated

Budgerigar (Melopsittacus undulatus) is a wild Australian parrot about 18 cm and 30–40 g, domesticated for pets. Large-scale breeding began in Europe in the 1840s and it was common by late 1800s; Australia banned exports about 1894. Human roles: pets; commercial and show breeding; education; research (vocal learning, brain, vision, color genes); wildlife interactions at water, farms and urban edges.

Danger Level

Low
  • Minor bites (usually superficial; more likely with fearful/untamed birds)
  • Allergies/asthma triggers from feather dander in sensitive individuals
  • Zoonotic infection risk if hygiene is poor-most notably psittacosis (Chlamydia psittaci) and, less commonly, enteric bacteria such as Salmonella spp.; risk is reduced with veterinary screening, clean housing, and handwashing
  • Household safety risks indirectly (e.g., aerosolized fumes like PTFE/Teflon overheating are dangerous to birds; not a direct human danger but commonly involved in human-budgerigar cohabitation issues)

As a Pet

Suitable as Pet

Legality: Budgerigar (Melopsittacus undulatus) is usually legal to keep and sell in the United States and many countries. Local welfare rules or seller licenses may apply; check local laws and any quarantine or import rules.

Care Level: Easy

Purchase Cost: $15 - $150
Lifetime Cost: $1,500 - $6,000

Economic Value

Uses:
Companion animal trade (pet industry) Aviculture and exhibition/show breeding Education/outreach animals Scientific research model (behavior, vocal learning, neurobiology, genetics)
Products:
  • Live companion birds (captive-bred)
  • Breeding stock for color morphs/exhibition lines
  • Aviculture services and related retail (cages, formulated diets, enrichment items)
  • Research animals and husbandry services for accredited facilities (where permitted)

Relationships

Predators 7

Peregrine falcon
Peregrine falcon Falco peregrinus
Australian hobby Falco longipennis
Brown Falcon Falco berigora
Collared sparrowhawk Accipiter cirrocephalus
Grey goshawk Accipiter novaehollandiae
Cat
Cat Felis catus
Carpet python
Carpet python Morelia spilota

Related Species 6

Rose-ringed parakeet Psittacula krameri Shared Family
Alexandrine parakeet Psittacula eupatria Shared Family
Plum-headed parakeet Psittacula cyanocephala Shared Family
Red-rumped parrot Psephotus haematonotus Shared Family
Bourke's parrot Neopsephotus bourkii Shared Family
Peach-faced lovebird Agapornis roseicollis Shared Family

Native to Australia, Budgerigars are stunning nomadic parrots, marked with green and yellow coloration on their chests and backs. Black feather patterns also decorate their backs. Males have a blue cere (the area above the beak), while females have a brown or tan cere.

Budgerigars spend the majority of their time in trees and typically nest in natural cavities such as tree hollows, rather than building intricate nests. Budgerigars are highly social among themselves and can live with humans as well. Males and females will pair up and live together in loose colonies in both the northern and southern territories. In the wild, these birds typically live 4 to 6 years, with much longer lifespans only possible in captivity.

Budgerigars are rather easy to domesticate and make good pets. They become extremely attached to their owners and will be able to recognize you even if you change your hairstyle or your clothes. Budgerigars can pick up on a large vocabulary and enjoy talking with humans. One budgerigar, Puck, holds the world record for the largest vocabulary of any bird, having learned 1,728 words.

4 Amazing Budgerigar Facts

  • Budgies are ranked as one of the most popular pets, following dogs and cats.
  • The name Budgerigar translates as “good to eat” in the native dialect of the Australian Aborigine.
  • They have over 1,000 possible color combinations of green, yellow, blue, and many shades in between.
  • Wild Budgerigar birds are easily domesticated and easily mimic human speech.

Where to Find Them

Budgerigar birds are native to Australia, and they migrate north and south throughout the country in the wild. These birds are also highly social, making them popular pets throughout the world.

Budgies also populate North America, South America, Europe, and Africa due to their status as one of the most common pet birds. In fact, there are reportedly up to five million of these little birds in the world today.

Budgerigar birds are native to Australia, and they migrate north and south throughout the country in the wild.

Scientific name

Only one bird species goes by the common name Budgerigar or Budgie. They are the sole species in the Melopsittacus genus. This creature’s full scientific name is Melopsittacus undulatus.

History and Evolution

While the parrot family has ancient origins dating back around 50 million years, budgerigars themselves have likely been present in Australia for less than 5 million years. Females are attracted to very chatty and thus intelligent males as opposed to quieter ones. Smarter budgies were also able to find food and water over those that weren’t as smart.

The name Budgerigar might have come from a mispronounced Aboriginal name for the colorful birds. Another line of thinking is that it comes from a combination of Aussie slang terms for “good bird” or “good food”.

Size and Appearance

Budgies are smaller than many other parrot varieties. They normally only weigh between 1 and 1.5 ounces. They are often only seven inches tall and have a total wingspan of 12 inches.

Although Budgies can come in one of a thousand different color combinations, yellow and green are the most common colors. Hints of blue as well as black often mark their heads and backs. The tail feathers can extend up to 4.5 inches.

Three cute colorful Budgerigars birds sitting on a branch

Budgies are often only seven inches tall and have a total wingspan of 12 inches.

Parakeet vs. Budgie

Depending upon where you look for information, some people will tell you that parakeets and budgies are the same. Essentially, this fact is true. However, the term “parakeets” refers to any number of small bird species with long tail feathers.

By some counts, there are nearly 400 individual parrot and parakeet species all over the Earth. Budgerigars are one species of bird that makes its home in Australia. The distinction between what these birds are called depends upon location. Australia, Europe, Africa, and the rest of the world call these small, brightly colored avians “budgerigars,” while in the US, these same birds are referred to as “parakeets.”

Budgies typically have a lifespan between five and ten years in captivity, but some of these birds have lived 15 years or more. Other parakeet species, such as the monk parakeet, can live up to 20 years or more.

Types of pet birds - Budgerigar

Budgies typically have a lifespan between five and ten years in captivity, but some of these birds have lived 15 years or more

Behavior

Budgies are social creatures, preferring to pair up in the wild and will even live in small colonies of a few hundred when not migrating. In captivity, these birds are playful and have a knack for mimicking speech and sounds. They are outgoing and love talking with their humans.

Budgerigar chick

Budgerigars are outgoing and love talking with their humans.

Nests

Out in nature, budgerigars prefer to live in tree holes or other crevices large and flat enough to lay their eggs. However, as pets, these birds will be happy with a flat box or floor filled with a soft material. Clean wood shavings or bits of shredded paper will do nicely for your pet budgie.

Diet

Budgerigars rely on grass seeds for most of their nutrition. They also root around on the ground for fruits and vegetation. Berries are also a popular snack, but too much fruit may make a budgie sick.

Budgerigars eat seeds, berries, fruits, and other vegetation.

Predators and Threats

The overall budgie population is on the rise. Easily and cheaply kept as pets, habitat destruction and other risks that would be of concern for other wild creatures are not a major concern for these birds. However, larger birds such as hawks and falcons do prey on the budgie. Feral cats, rats, and other rodents sometimes raid budgie nests for eggs or hunt the birds themselves.

Reproduction, Babies, and Lifespan

Female budgies reach adulthood at around eight months of age. In the wild, these birds will pair up to mate and raise offspring. Females normally lay between four to six eggs in a single clutch. The eggs can take up to 20 days to incubate prior to the chicks hatching. Sometimes, it takes another week to 10 days for all the eggs to hatch.

Chicks are born blind and without down or other feathers. Their mothers are responsible for keeping them warm constantly over the first 10 days or so until their eyes open. They will then begin to grow down and feathers, but it will be another four or five weeks before these younglings can leave the nest.

Between six and eight weeks, fledglings begin to learn to fly and begin attempting to leave the nest. Age for flight varies depending on the number of chicks in the brood and the age of each chick. For example, chicks born with no other nest-mates often learn to fly sooner than birds from larger clutches. “Only children” benefit from their parents’ extra attention.

Age for flight varies depending on the number of Budgerigar chicks in the brood and the age of each chick.

Breeding

Breeding in the wild takes place anywhere between June and September in Northern Australia and between August and January in the South. Although budgerigars are opportunistic breeders, they do show affection to their flock mates by preening or feeding one another. Populations in some areas have increased as a result of increased water. Nests are generally made in holes in trees, fence posts, or fallen logs. Four to six eggs are laid at a time.

Population

The budgerigar’s conservation status is labeled as least concern as far as its risk of becoming endangered. They reproduce easily and frequently, both in the wild and in captivity. As a result, the total worldwide budgie population is estimated at more than 5,000,000 birds and growing.

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How to say Budgerigar in ...
Bulgarian
Вълнист папагал
Catalan
Periquito
Czech
Andulka vlnkovaná
Danish
Undulat
German
Wellensittich
English
Budgerigar
Spanish
Melopsittacus undulatus
Finnish
Undulaatti
French
Perruche ondulée
Hebrew
תוכון
Croatian
Tigrica
Hungarian
Hullámos papagáj
Italian
Melopsittacus
Japanese
セキセイインコ
Dutch
Grasparkiet
Polish
Papużka falista
Portuguese
Periquito-australiano
Swedish
Undulat
Turkish
Muhabbet kuşu
Chinese
虎皮鸚鵡

Sources

  1. Wikipedia / Accessed December 28, 2020
  2. Pet Place / Accessed December 28, 2020
  3. Wikihow / Accessed December 28, 2020
  4. Bush Heritage / Accessed December 28, 2020
  5. Tail Feathers / Accessed December 28, 2020
  6. World Birds / Accessed December 28, 2020
  7. The Royal Society / Accessed December 28, 2020
  8. Australia / Accessed December 28, 2020
Heather Ross

About the Author

Heather Ross

Heather Ross is a secondary English teacher and mother of 2 humans, 2 tuxedo cats, and a golden doodle. In between taking the kids to soccer practice and grading papers, she enjoys reading and writing about all the animals!

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Budgerigar FAQs (Frequently Asked Questions)

A Budgerigar, or budgie, is a small Australian bird that likes to live in tree trunks. These birds have bright colors such as green, yellow, and blue on their feathers. Black markings are common on the budgie’s back and face. Their wingspan is only 12 inches and they usually weigh less than 1.5 ounces.