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Species Profile

Teddy Bear Hamster

Mesocricetus auratus

Fluffy coat, big cheeks, wild spirit
Happy monkey/Shutterstock.com

Teddy Bear Hamster Distribution

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Origin Location

This map shows the native origin of the Teddy Bear Hamster. As a domesticated species, they are now found worldwide.

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Found in 1 country

teddy bear hamsters in cozy hole

At a Glance

Domesticated
Also Known As Golden Hamster, Golden Syrian Hamster, Pet Hamster, Domestic Hamster, Hammy
Diet Omnivore
Activity Nocturnal+
Lifespan 1.5 years
Weight 0.2 lbs
Status Not Evaluated
Did You Know?

"Teddy bear hamster" is a pet-trade coat variety of the Syrian hamster, not a separate species.

Scientific Classification

A small cricetid rodent widely kept as a pet. The “teddy bear” label typically indicates a long-haired Syrian hamster variety selected in captivity for coat length and fluffiness.

Kingdom
Animalia
Phylum
Chordata
Class
Mammalia
Order
Rodentia
Family
Cricetidae
Genus
Mesocricetus
Species
Mesocricetus auratus

Distinguishing Features

  • Larger than dwarf hamsters (robust body)
  • Usually solitary and territorial compared with many dwarf hamsters
  • ‘Teddy bear’ variety: noticeably longer, softer coat (especially in males) giving a fluffy appearance
  • Cheek pouches and short tail typical of hamsters

Physical Measurements

Males and females differ in size

Length
6 in (5 in – 7 in)
Weight
0 lbs (0 lbs – 0 lbs)
0 lbs (0 lbs – 0 lbs)
Tail Length
0 in (0 in – 1 in)
1 in (0 in – 1 in)
Top Speed
6 mph
running

Appearance

Primary Colors
Secondary Colors
Skin Type Fully furred mammalian skin with dense underfur; long-haired variety has elongated guard hairs ("skirt" feathering) over flanks and rump.
Distinctive Features
  • "Teddy bear hamster" is a pet-trade label for the long-haired Syrian hamster, not a separate species.
  • Adult head-body length commonly ~13-18 cm; tail very short ~1-2 cm (species typical).
  • Adult body mass commonly ~0.085-0.15 kg, with variation by sex, diet, and strain.
  • Coat: long guard hairs, especially on flanks and rump; can look fluffy or parted.
  • Large, expandable cheek pouches used for transporting food/bedding to the burrow.
  • Prominent, rounded ears; small eyes; compact body with short limbs.
  • Solitary/territorial as adults; same-sex cohabitation often leads to aggression.
  • Primarily crepuscular/nocturnal; strong burrowing/hoarding behavior and wheel-running in captivity.
  • Dorsal flank scent glands (especially visible in males) used for marking territories.
  • Key ID vs dwarf hamsters (Phodopus/Cricetulus): larger body, longer muzzle, typically more solitary.
  • Captive lifespan typically ~2-3 years; wild longevity often shorter (~1-2 years).

Sexual Dimorphism

Males are typically slightly larger with a much longer anogenital distance and prominent scrotal testes. Females have a shorter anogenital distance and visible nipples; both sexes share similar coat colors in most morphs.

  • Greater anogenital distance; prominent testes in mature males.
  • Flank scent glands often more obvious and may appear darker/greasier.
  • Often slightly heavier/longer on average in adult colonies.
  • Shorter anogenital distance; nipples visible, especially during lactation.
  • Estrous cycle ~4 days; receptive period brief compared with males' continual fertility cues.
  • Body size often slightly smaller on average, though overlap is substantial.

Did You Know?

"Teddy bear hamster" is a pet-trade coat variety of the Syrian hamster, not a separate species.

Adults are about 13.5-17.5 cm in head-body length and typically weigh roughly 0.085-0.150 kg (values vary by sex and condition).

Syrian hamsters have one of the shortest mammalian gestations commonly kept as pets: about 15-16 days.

Females have an ~4-day estrous cycle, making them capable of rapid breeding under suitable conditions.

They can pack food into expandable cheek pouches that extend back toward the shoulders, allowing impressive "grocery runs."

Standard dental formula is 1/1, 0/0, 0/0, 3/3 (=16 teeth), with incisors that grow continuously.

The species is a major biomedical model (e.g., infectious disease and respiratory research), including widespread use in SARS-CoV-2 studies.

Unique Adaptations

  • Expandable cheek pouches lined with fur (not saliva-wet like many mammals), helping keep carried food relatively dry; pouches can be everted for cleaning.
  • Highly efficient digging limbs and body plan for fossorial life; strong forelimbs and compact build suit tunnel excavation.
  • Physiological flexibility for arid/seasonal environments: ability to reduce activity (torpor) and rely on stored food rather than daily foraging.
  • Well-developed olfaction and scent glands for solitary territorial communication in low-visibility burrows.
  • Continuously growing incisors paired with strong jaw musculature for processing hard seeds and gnawing through tough materials.
  • Chromosome number commonly reported for Mesocricetus auratus: 2n = 44 (a reason it is widely used in genetics/cell research).

Interesting Behaviors

  • Strictly solitary by nature: adult Syrian hamsters often fight if housed together; cohabitation is a frequent cause of severe injury.
  • Nocturnal/crepuscular activity: most exploration, running, and foraging happens at night; daytime disturbance can increase stress and defensive biting.
  • Burrow engineering: in the wild they dig multi-chamber burrows (nest chamber, food stores, latrine), and pets often replicate this with deep bedding.
  • Food hoarding ("larder hoarding"): they transport and stash seeds/pellets in a cache rather than eating everything immediately.
  • Scent marking: they use flank scent glands to mark territory and objects; rubbing is especially noticeable in mature males.
  • Thermoregulatory torpor: in cool conditions or when food is scarce, they can enter short-term torpor with reduced activity and metabolism (a survival strategy in seasonal habitats).
  • Gnawing and 'bar chewing': persistent gnawing is normal tooth maintenance, but repetitive bar biting can also signal boredom, insufficient space, or inadequate enrichment.
  • Long-haired (teddy bear) grooming patterns: long coat-especially the male "skirt"-tangles easily and prompts more grooming and substrate-carrying in fur if bedding is sticky or dusty.

Cultural Significance

The long-haired "teddy bear" Syrian hamster (Mesocricetus auratus) is a common first pet, bred for a plush look even though it is naturally solitary. It is a key lab animal in disease and virus research and a media symbol (hamster wheel, cheeks).

Myths & Legends

Many stories say today's pet Syrian hamsters (Mesocricetus auratus) came from animals collected near Aleppo, Syria, in 1930 by scientist Israel Aharoni—an origin tale often called the start of pet hamsters worldwide.

Name story: Mesocricetus auratus (auratus means "golden") led people to link hamsters with luck, warmth, and a "golden" nature. Pet ads used it for the golden color and later the fluffy 'teddy bear'.

Household superstition about the long-haired Syrian hamster (Mesocricetus auratus, “teddy bear” variety) says its habit of storing food is a sign the home will have plenty, a modern passed-down belief.

Conservation Status

NE Not Evaluated

Has not yet been evaluated against the criteria.

Population Stable

Life Cycle

Birth 8 pups
Lifespan 2 years

Lifespan

In the Wild
1–2 years
In Captivity
1.5–4 years

Reproduction

Mating System Promiscuity
Social Structure Solitary
Breeding Pattern Transient
Fertilization Internal Fertilization
Birth Type Internal_fertilization

Solitary Syrian hamsters meet only for brief estrus (about every 4 days); mating is internal and typically involves multiple partners. No pair bond forms; after a ~15-16-day gestation, females rear litters (commonly 6-12 pups) alone.

Behavior & Ecology

Social Solitary Group: 1
Activity Nocturnal, Crepuscular
Diet Omnivore Energy-dense seeds/grains (cereal kernels and other large seeds; in captivity this often corresponds to items like sunflower-type oilseeds, but the species' core preference is for starchy/oily seeds).
Seasonal Hibernates

Temperament

Predominantly solitary and highly territorial; co-housing adults commonly escalates to fighting (Gattermann et al., 2001; Harkness & Wagner, 2010).
"Teddy bear" long-haired individuals show typical Syrian hamster behavior; coat-length selection does not reliably change sociability.
Breeding tolerance is brief; females may attack males after mating, so separation is standard in captive management (Harkness & Wagner, 2010).
Maternal behavior is strong, but disturbance can increase infanticide/cannibalism risk; nests are defended aggressively (Harkness & Wagner, 2010).
Captive lifespan typically ~2-3 years; reports of ~4 years occur but are uncommon (Harkness & Wagner, 2010).
Behavioral variation across individuals: some become tractable with regular handling; others remain reactive/defensive and may bite when startled.

Communication

Audible squeaks/squeals during distress, handling, or aggressive encounters.
Hissing/growling-like sounds during threat displays and defensive postures.
Ultrasonic vocalizations USVs), especially from pups and during courtship contexts (laboratory observations; see Harkness & Wagner, 2010
Scent marking via flank glands and body rubbing; strong individual odor signatures.
Urine/fecal marking used to advertise occupancy and reproductive state within territories.
Threat and submission postures (upright stance, lunging, freezing) regulate conflicts.
Tactile signals during courtship and mother-pup care Nosing, grooming, retrieving

Habitat

Biomes:
Mediterranean Temperate Grassland Desert Hot
Terrain:
Plains Valley Rocky Sandy
Elevation: Up to 4921 ft 3 in

Ecological Role

Omnivorous seed predator and invertebrate consumer in steppe/agricultural mosaics; also an ecosystem engineer via burrowing.

regulates some invertebrate populations through predation affects plant recruitment through seed predation and occasional unretrieved cache-mediated seed dispersal soil turnover/aeration and microhabitat creation through burrow construction serves as prey base for local predators (raptors, small carnivores, snakes), supporting food webs

Diet Details

Main Prey:
Seeds Grasshoppers and crickets Caterpillars and insect larvae Small invertebrates
Other Foods:
Cereal grains and seeds Wild grass seeds and other small seeds Legume seeds Green plant material Roots, tubers and other underground plant parts Fruits

Human Interaction

Domestication Status

Domesticated

Syrian hamsters (Mesocricetus auratus) come from semi-arid steppe and farm edges in northern Syria. Most pet and lab hamsters descend from one wild litter taken near Aleppo in 1930, causing a documented genetic bottleneck. The long-haired "teddy bear" is a captive-selected coat type. Human roles: pets, lab models, classroom animals, pests, rescue, regulated trade.

Danger Level

Low
  • Bites can occur, especially if startled or improperly handled; bites may break skin and can become infected.
  • Allergic reactions to dander/urine/bedding dust in sensitized people.
  • Zoonotic pathogens are uncommon in well-managed pets but possible (e.g., Salmonella from poor hygiene; lymphocytic choriomeningitis virus has been associated historically with some rodent populations-risk is low in reputable pet sources).
  • Injuries from improper handling (falls) are a welfare risk to the animal and can prompt defensive biting.

As a Pet

Suitable as Pet

Legality: Long-haired "teddy bear" Syrian hamster (Mesocricetus auratus) is usually legal as a pet in most places, including much of the mainland U.S., but some areas (for example Hawaii), landlords, or local rules may ban or limit them. Check local laws.

Care Level: Easy

Purchase Cost: $15 - $60
Lifetime Cost: $500 - $1,800

Economic Value

Uses:
Companion animal / pet industry Commercial breeding (coat/colour varieties; long-haired lines) Biomedical research model organism Education and outreach Pet supplies market (caging, bedding, feeds, enrichment)
Products:
  • live animals for the pet trade (including long-haired 'teddy bear' varieties)
  • live animals for laboratory research colonies
  • specialized feeds, bedding substrates, cages/wheels/hides, and veterinary services driven by ownership

Relationships

Predators 8

Barn owl
Barn owl Tyto alba
Eurasian eagle-owl
Eurasian eagle-owl Bubo bubo
Little owl Athene noctua
Red fox
Red fox Vulpes vulpes
Least weasel Mustela nivalis
European polecat
European polecat Mustela putorius
Cat
Cat Felis
Levantine sand boa Eryx jaculus

Related Species 8

Turkish hamster Mesocricetus brandti Shared Genus
Romanian hamster Mesocricetus newtoni Shared Genus
Ciscaucasian hamster Mesocricetus raddei Shared Genus
Chinese hamster Cricetulus griseus Shared Family
Greater European hamster Cricetus cricetus Shared Family
Campbell's dwarf hamster Phodopus campbelli Shared Family
Djungarian hamster Phodopus sungorus Shared Family
Roborovski dwarf hamster Phodopus roborovskii Shared Family

Ecological Equivalents 4

Animals that fill a similar ecological role in their ecosystem

Mongolian gerbil Meriones unguiculatus Small-bodied, burrowing, largely nocturnal/crepuscular granivore-omnivore from semi-arid steppe/desert margins. Both cache dry seeds and grains and use burrow systems for thermoregulation and predator avoidance, indicating niche convergence despite belonging to different rodent families.
House mouse
House mouse Mus musculus Comparable size class and omnivorous diet (seeds, grains, and invertebrates); strong use of shelters and burrows; and a rapid life history. Overlaps with Syrian hamster in human-modified habitats (e.g., field edges, grain storage), creating similar resource use and predation pressures.
Brown rat
Brown rat Rattus norvegicus Although larger, it occupies a similar omnivorous commensal and field-edge niche in many regions and can overlap on stored grains and invertebrates. Both are primarily nocturnal and exploit burrows and cover. This is also relevant because rats are important competitors and predators in captivity and around human settlements.
Common vole Microtus arvalis Syrian hamsters (Mesocricetus auratus) are preyed upon by the same predators (owls, foxes, mustelids), use dense ground cover and burrows in open habitats, and eat mostly plants while occupying a small ground‑dwelling rodent niche.

Teddy Bear Hamster Breeds

5

Explore 5 recognized breeds of teddy bear hamster

Coat Variety (pet Fancy) (2)

Long-haired ("Teddy bear") Syrian hamster Origin: Developed in captivity (pet trade; widely standardized in UK/Europe and North America)
Short-haired Syrian hamster Origin: Developed in captivity (pet trade; widespread)

Coat Variety (pet Fancy; Curly/wavy Coat) (1)

Rex Syrian hamster Origin: Developed in captivity (pet trade)

Coat Variety (pet Fancy; Glossy Hair Shaft) (1)

Satin Syrian hamster Origin: Developed in captivity (pet trade)

Color/pattern Variety (pet Fancy) (1)

Banded Syrian hamster Origin: Developed in captivity (pet trade)

“A teddy bear hamster can stuff its cheek pouches with an amount of food equal to 20 percent of its body weight”

The teddy bear hamster is also known as a long-haired Syrian hamster. These tiny mammals are herbivores eating grains, vegetables, and fruit. A teddy bear hamster’s tail is very short at about half an inch long. They are solitary animals with an average lifespan of 2-3 years.

5 Incredible Teddy Bear Hamster Facts!

  • Teddy bear hamsters are originally from Syria.
  • They can carry food along with bedding in their cheek pouches.
  • These hamsters are nocturnal.
  • Their large ears and small dark eyes make them look similar to teddy bears.
  • They are an easy pet to tame with gentleness and patience.

Teddy Bear Hamster Scientific Name

Syrian Hamster eating a carrot on building blocks..

Syrian hamsters belong to a vast family comprising over 20 species

The scientific name of a teddy bear hamster is Mesocricetus auratus. The word Mesocricetus is Latin for hamster and the word auratus means gold. It’s also known as a long-haired Syrian hamster and sometimes a golden hamster. These small creatures belong to the Cricetidae family and are in the class Mammalia.

There are over 20 species of hamsters. Some of those include:

  • Winter white dwarf hamster
  • Roborovski dwarf hamster
  • Chinese hamster
  • Campbell’s dwarf hamster
  • Turkish hamster

Evolution and Origins

Syrian hamster on a white background

The Syrian hamsters loved by many pet enthusiasts were taken from Aleppo, Syria, hence their name

The ancestors of the teddy bear hamsters’ wider family are believed to have shown up in North Africa and Europe during the Miocene about 11.2 million to 16.4 million years ago and about 6 million to 11 million years ago in Asia. During this same epoch, a particular forbear belonging to the genus Cricetus roamed North Africa and it is this same prehistoric rodent which gave rise to the critter known as the common or European hamster.

Syrian hamsters’ first known literary mention dates back to the very end of the 18th century, in a Natural History of Aleppo written by Scottish physician Alexander Russell.

Four decades later they were bestowed with the name of golden hamster by the curator of the London Zoological Society, George Robert Waterhouse.

Approximately one century later in 1930,  scientist Israel Aharoni arrived in Aleppo where it had all begun, in search of the famed critter. He was richly rewarded when he discovered a female of the species along with 11 pups.

Aharoni was able to make it back to the Hebrew University with four siblings which he bred —  most of the rest had energetically chewed their way out of captivity.

The progeny of the four were sent to the United Kingdom and the United States during that same decade and the next, too. The cuddly little critters soon won the hearts of pet owners on either side of the Atlantic, and as a result soon became cherished members of several homes — a trend which has continued right up until today.

Appearance and Behavior

teddy bear hamster on a rock

Teddy Bear Hamsters are very territorial and use their sharp teeth to defend themselves.

The coat of a teddy bear hamster can be a solid color or a combination of colors. Their hair can be solid black, brown, gold, or dark gray. Other teddy bear hamsters feature a mixture of colors such as gray or black with a white chest, brown with bands of white, or gold with splotches of white. The combinations are endless!

These hamsters grow to be around 6 inches long and weigh just 3.5 to 5.3 ounces. Dwarf hamsters are about half the size of teddy bear hamsters. Picture a one-dollar bill and you’re looking at something equal in length to an adult 6-inch teddy bear hamster. A teddy bear hamster weighing around 5 ounces is equal in weight to a baseball. The longest a teddy bear hamster can be is 7 inches, but that’s rare.

A gerbil is another popular pet from a different family that grows as long as 4 inches. But its tail adds another 4 inches to its length!

Though we are most familiar with these hamsters as pets, they do have some defensive features they use in the wild. They stuff their cheek pouches full of food and bedding to make a fast getaway when a predator approaches. This allows them to move to a more secure place without losing these items.

They’re nocturnal so moving from one place to another during the night may give them some cover from threats. A hamster with a black or dark coat would be even harder for predators to see.

Teddy bear hamsters also have sharp teeth to defend themselves. But even sharp teeth aren’t likely to help if this small animal is attacked by a dog or an owl.

Teddy bear hamsters are solitary. They don’t get along with dwarf hamsters or any other type. These animals can be shy with people but they can be tamed. It’s important to move slowly with a hamster because they may bite if frightened.

Fancy Hamster vs Teddy Bear Hamster

Fancy Bear Hamster

Fancy Bear hamsters are teddy bear hamsters’ short-haired cousins and are easier to care for as a result

Fancy hamsters and teddy bear hamsters have a lot of similar features. They’re both Syrian hamsters kept as pets. These hamsters eat the same type of food and are nocturnal. But some differences are existing between these two.

A significant difference has to do with their coat. A teddy bear hamster is long-haired while a fancy hamster has short hair.

This leads to a difference relating to coat maintenance. Shavings and dirt can become caught in the long coat of a teddy bear hamster. A toothbrush with soft bristles is perfect for gently removing this debris.

The third difference between these critters has to do with price. Some pet shops charge a higher price for fancy hamsters. Why? The name fancy implies the hamster is a little better quality than other hamsters. This isn’t true. There’s very little difference between these hamsters. In addition, a fancy hamster’s hair is shorter, so it requires less maintenance than a teddy bear hamster’s coat. Some pet shop owners charge a higher price for fancy hamsters because their short hair makes them a little easier to care for.

Habitat

teddy bear hamster eating

Teddy bear hamsters can still be found in the wild at present

Teddy bear hamsters are originally from Syria. They thrive in an arid climate. In the wild, they live underground in burrows to keep cool and safe from predators during the day. They come out at night to look for food. There are still some Syrian hamsters living in the wild today, but their population is decreasing.

A teddy bear hamster kept as a pet can live in an aquarium or wire cage. These pets need a layer of shredded paper or aspen shavings to serve as bedding. They like to burrow down into the bedding or build up a heap of it in one corner. These creatures are comfortable in a warm room in an area free of cold drafts.

Predators and Threats

All Syrian hamsters are herbivores. They use their sharp teeth to mash up or cut through plants and grains of many types.

What does a teddy bear hamster eat?

Hamster Eat Infographic
Both wild and tame Syrian hamsters require a herbivorous diet

Wild and domesticated Syrian hamsters eat plants, grains, vegetables, and fruits. A hamster living in the wild is limited to eating whatever plant life is in its environment. Alternatively, a pet teddy bear hamster gets to eat a variety of fruits, veggies, treats, etc. brought to it by its owner.

Some things are not good for a hamster to eat such as almonds and peanuts. These foods are too high in calories to be healthy for a hamster to consume.

What eats a teddy bear hamster?

great horned owl

Owls are one of Syrian hamsters’ many predators

Some of the predators of wild hamsters include owls, foxes, and snakes. All of these animals have access to wild Syrian hamsters or share the same type of habitat. For instance, a snake can follow a hamster into its burrow to capture it, and owls, as well as foxes, are active at night just like these hamsters.

The wild Syrian hamster has a dwindling population. They’re losing their habitat and sometimes they’re killed as pests by farmers. Their conservation status is Vulnerable.

Reproduction and Lifecycle

Syrian hamster on a white background

Syrian hamsters are prolific producers and can give birth to as many as 20 pups

Teddy bear hamsters reach sexual maturity at 6 weeks old. But they should not be bred until they are about 6 months old. A female teddy bear hamster won’t mate with a male unless she is in heat. Being in heat means she’s at a point in her menstrual cycle when she can become pregnant. Teddy bear hamsters are not social so even a male and female shouldn’t be kept together for more than a few hours. These animals can have multiple partners throughout their life. The gestation period of this hamster is about 16 days. This is similar to the gestation period of a pet mouse which is 19 to 21 days.

A female hamster usually has 6 to 12 babies, or pups, in a litter. Some females give live birth to 20 pups in a single litter! A hamster pup weighs less than an ounce, has no hair, and is born with its eyes closed. At 5 days old their teeth and coat start to grow. The pups’ eyes open at about 2 weeks old. They continue to nurse from their mother until they’re 2 weeks of age. At that point, the pups begin to eat solid food. At the age of 3 or 4 weeks, hamster pups look like smaller versions of adult hamsters. At 4 weeks old a hamster pup can live apart from its mother.

The lifespan of teddy bear hamsters is 2 to 3 years. The oldest hamster on record lived for 7 years.

These hamsters are vulnerable to an illness called wet tail disease. It causes bacteria in the intestines that lead to diarrhea and loss of appetite. A hamster with this illness needs to be taken to a small animal veterinarian for care.

Population

The population of wild Syrian hamsters is unknown. But biologists believe their population is decreasing and they’re listed as vulnerable.

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Sources

  1. Cool Green Science / Accessed September 2, 2021
  2. Wikipedia / Accessed September 2, 2021
  3. PetMD / Accessed September 2, 2021
  4. bechewy / Accessed September 2, 2021
  5. Hamster Guru / Accessed September 2, 2021
A-Z Animals Staff

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A-Z Animals Staff

AZ Animals is a growing team of animals experts, researchers, farmers, conservationists, writers, editors, and -- of course -- pet owners who have come together to help you better understand the animal kingdom and how we interact.
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Teddy Bear Hamster FAQs (Frequently Asked Questions)

A teddy bear hamster is also known as a long-haired Syrian hamster. These small creatures grow to 6 inches long and weigh up to 5.3 ounces. They got their name from their similarity to a teddy bear with large ears, small dark eyes, and a tiny nose. These animals have solid or mixed coat colors.

Though there are some wild hamsters in Syria, many are kept as pets.