18 Interesting Facts About Hamsters: Behaviour, Care, Tips

Whether you are new to the world of hamster keeping or you’re already a seasoned veteran, this blog is written for you. But if you prefer to watch a video, check out this awesome hamster fact video. We’ll talk about hamsters, their behaviour, temperament, lifespan and more! So let’s start with a bit of hamster history. Experts say that the origin of hamsters can be traced back to Syria.

They were once considered pests and farmers trained dogs to hunt them down, and some even sold hamster fur to make money. The hamster population steadily declined until they become extinct. Or so they thought. Back in the 1920s, Aaron Abrahams, an archaeologist, discovered a nest of hamsters. He brought the hamsters to Jerusalem and bred them there, sent a couple of hamsters to other countries, and the rest is history.

MUST-READ: Crash course on proper hamster care


If it’s your first time owning a hamster, you should read this post and join these support and forums groups on Facebook. Read on for more interesting and amazing facts about hamsters.

ALSO READ: How much does owning a hamster cost? Here’s our rundown.

1. Hamsters are nocturnal/crepuscular animals

Hamsters are nocturnal or crepuscular animals, which means they are more active at night than in the daytime or more specifically during dusk and dawn. This is the reason why it isn’t a good idea to disturb them in the mornings when they are in the hamster dreamworld.

Disturbing their natural sleep cycle may cause them stress and even health problems. If you want your hamsters to be as healthy and as happy as possible, let them play at night and let them rest during the day. Here’s a guide on how to tell if your hamster is happy or not.

It’s not uncommon though that hamsters adapt to a different sleeping pattern like any animal. Female hamsters in the wild are even diurnal – which means active during the day.

What’s important to know to remember is to know your hamster’s sleeping pattern and don’t disturb them during this time.

2. Do hamster hibernate

One of the big misconceptions about hamsters is hibernation. To simply answer this, hamsters do not hibernate. However, hamsters can fall into a state of torpor. Hibernation is when an animal can set itself into dormancy during extreme cold and able to wake itself up once the temperature is warm enough.

While torpor is when an animal sleeps and let its body slows down due to cold temperature. Torpor is a state of regulated hypothermia and an endotherm. Wild hamsters can handle and have the ability to be “torpid”, however, it’s the opposite for domesticated hamsters. If a domesticated hamster goes torpid, it can be fatal for them.

To avoid your hamster falling into a torpid situation, make sure that your hamster’s cage is in the warmest part of the house especially during winter. You can place blankets around the cage (but don’t distract any airflow), you can also plat a hot bottle and wrap it with a towel and place it by the cage. Don’t use direct light to the cage.

3. They have poor eyesight

Because hamsters do not need to possess a good pair of eyes just to get by in the dark, they were cursed with poor vision by evolution; the good thing is, they were gifted by mother nature with a keen sense of smell and hearing.

Using their other senses is how they’re able to navigate and survive in the natural world. It is one of the reasons why hamsters sometimes bite their owners when they are held or touched, especially if the hand smells like food.

A hamster can only see a few inches far from his or her nose. That’s how bad their eyesight is. This is the reason why experts are discouraging hamster owners from using a cage with multiple levels as they may fall and hurt themselves because of being unable to sense height accurately.

This is also the reason why it isn’t a good idea to hold a hamster high; they may suddenly jump, which can result in broken limbs and even internal damage.

4. They are very active animals

Hamsters in the wild tend to run here and there and to and fro, gathering food and digging the soil to create a hiding place from their predators. That’s a good thing in the wild, but it can be irritating for us humans.

The sound of the squeaking wheel may not be the most calming sound out there. However, you can’t blame them for their instinctive behaviours. Hamsters in captivity will still behave pretty much the way they do in the wild.

They need 3-7 hours of running each day, and they can run up to 21 kilometres a day, so if you take their squeaky wheel away, it can affect their health in the wrong way, i.e., hamster paralysis. This is precisely why hamster wheels are placed in their cage; they need to be hyperactive to stay fit. Learn more through this post, why hamsters run on wheels.

If they get bored, they will try to escape, if that happens, here are ways on how to find an escaped hamster. It’s very important that you keep your hamster busy and active to burn all the extra energies they have.

5. The ability of their pouches

One of the most famous traits of hamsters aside from their cuteness is their cheek pouches; it even makes them cuter when they fill them with food. Their pouches can carry as much as 20 per cent of their own body weight. How cool is that? The purpose of their cheek pouch is to carry food. In the wild, they have to look for food to bring and store in their burrows.

Their pouches help them efficiently collect food, minimizing the number of trips they have to take.

They are also used to carrying their babies if need be. Some species of hamsters even use their pouches as a buoyant to help them swim in the wild, but please DO NOT test this at home! Even if this is one of the most surprising facts about hamsters, it is only observed in the wild. You don’t want to drown your domesticated hammies accidentally.

6. Diseases they are prone to

Hamsters, like any other type of animal, are prone to diseases, too. Some of the most common ailments that may affect hamsters are the Wet Tail (diarrhoea which makes a hamster’s tail wet), skin diseases caused by mites and other parasites, respiratory infections, and infections in their cheek pouches.

These diseases are often caused by poor cage set-up, poor cage sanitation, diet, and even chemicals such as perfume or antibiotics.

Be wary if you notice that your pet hamster suddenly loses its appetite, or is being unusually lazy because it is a symptom of a disease. Other symptoms to watch out for are frequent sneezing or coughing, liquid discharges from the eyes, diarrhoea, and hair loss. These are the most common signs that your hamster needs medical attention.

Hamsters are also prone to diabetes and obesity; therefore, it is vital to watch the food that they take. An owner must know that balanced diet for their hamsters. Read this list of common hamster illnesses.

7. Hamsters have a short lifespan

Hamsters can live up to 3 years of age on average. Experts say that 13 hamster days is equivalent to 1 human year.

Do you want to determine the hamster age to human age? It’ll be fun! First, we must take the average human expectancy, which is 80 years, and the average hamster lifespan of 3 years. We’ll multiply 80 years and 3 years to 365 days, and we’ll get 29200 (human) and 1095 (hammy). We will then divide 29200 by 1095, and the quotient will be 26.7.

We can, therefore, conclude that 26.7 human days is equivalent to 1 hamster day. If we divide 365 by 26.7, we’ll get 13.67, which means that a year to a hamster is just 13.67 days to a human. That means that when your pet hamster reaches 2 years of age, your hamster is already considered very old.

8. Breeding

Hamsters reach sexual maturity between 6 to 7 weeks old, but the best time for them to mate with the opposite sex is between 10 and 15 months. When the female enters her estrus mode (sexual receptivity), she will be ‘in heat’ for 12 hours once every 4 days.

The signs of pregnancy will typically manifest anytime between 10 and 18 days after mating with her partner. Signs include stomach swelling and unusual hyperactivity.

ALSO READ: Pregnant Hamster Ultimate Guide – Accidental pregnancy

The gestation period typically lasts from 16 to 22 days, and the mama hamster can have up to 8 baby hamsters! What’s impressive is that the mama hamster can get pregnant again 24 hours after giving birth! You can imagine how fast they can reproduce, which is typical among the rodent family!

Hence, it is important to separate the sexes if you decide to have two hamsters that are of two different genders. Lousy breeding can cause to short life span and diseases. It’s best to leave breeding to the experts and licensed professionals.

9. Hamster’s teeth and nails

A hamster’s frontal teeth continuously grow, they never stop growing as long as they are alive! That’s why they have formed the habit of chewing on anything they can chew in order to keep their incisors short.

Having nothing to chew on can give your hamsters a problem. Imagine having a pair of frontal teeth that continuously grow until you are no longer able to close your mouth!

When your hamster’s teeth grow long enough, it can injure their tongue, gums and even their cheek pouch, which can cause bleeding, and worse, an infection. It is always a good idea to give them something to chew on, like a piece of wood or toys specifically designed for hamsters.

If despite being given something to chew on, their teeth still managed to overgrow, then you’ll need the help of a veterinarian. Never attempt to clip your hamster’s teeth by yourself, seek help from the professionals like veterinarians.

ALSO READ: Why biting the bar is bad for your hamster and How to stop your hamster from chewing bar cage

The same goes for a hamster’s nails. They grow forever, therefore, trimming their nails at least once in 4-6 weeks is needed. We don’t recommend you to cut your own hamster’s nails for the first even though you have experience doing so. You can place and arrange stones to help trim your hamster’s nails, here are some rocks for the hamster’s cage.

At this time, you and your hamster is still learning and getting to know each other and building trust. Hence, we only recommend you bring your hamster to the vet the first time. Here’s our guide on hamster nail care.

10. Hamsters are very moody

Here’s another interesting fact about hamsters: according to studies, hamsters are quite moody creatures. You need not further convincing if you have been bitten by a hamster you’re just trying to pet but at the same time, this is one of the reasons why hamsters shouldn’t be given as a surprise gift.

Aside from mistaking your hand to be food, they may also bite you intentionally, especially when they are feeling grumpy or threatened. They can quickly enter a bad mood when they are hungry, thirsty, or if they are not feeling very well.

If you want to be able to play and cuddle your hamster, try these taming techniques, however, you should also know when to give up the taming process since it’s already engraved to the hamster’s genes to be moody and defensive.

11. Why do hamsters love to hoard

Hoarding food is one of the most popular behaviour observed in hamsters. Their name came from the German word ‘hamstern’ which means ‘to hoard’ or ‘hoard.’ Their hoarding behaviour is instinctive; their natural habitat is in the northern part of the globe where food availability is limited during winter.

Being such a big prey to a lot of animals, this survival situation limits their chances to go out and find food whenever they feel hungry. So, they have to hoard as much food as they can and as much as possible to prepare for food scarcity.

Even if a hamster is living in the care of humans, they will still cling to their old habit of hoarding, because, well, habits die hard.

12. Most hamsters are strictly solitary

Almost all species of hamsters are solitary and best to be left alone. House them with another hamster in the regular days, and you’ll see them fight and hurt each other. Hamsters are very territorial even towards their own babies.

Housing more than one hamster in one cage can cause aggressiveness and leads to hamster biting you or other hamsters in the cage often. Read this article about why hamsters bite and how to stop it.

13. They are territorial

While dwarf hamsters tend to be well-behaved towards hamsters of the same gender, they can be very territorial towards hamsters of the opposite sex. On the other hand, Syrian hamsters should not be mixed with another hamster regardless of gender. They are the more territorial type and won’t hesitate to fight when caged with another hamster.

ALSO READ: Why you hamsters can’t live together

14. Early pregnancy

Another reason why you can’t house more than one (1) hamster in one cage is because of how early female hamsters can get pregnant. As early as 16 weeks old, female hamsters can get pregnant, therefore, it is important to separate them at 2-3 weeks old. If you are waiting for an extra cage, make sure to separate male from female hamsters until the new cage/s arrive. Read this accidental pregnancy guide.

15. Coat Change

During winter, one of the hamster species, Dwarf Winter White, would change its coating colour. A Winter White would change from grey to almost snow-white during winter, then slowly go back to grey in spring, and then in a darker shade in summer.

But this all depends on a few things like how your hamster was bred and the lighting and heat in their cages. Many Winter White hamsters are classified in this species but you won’t see their coat change most likely because of the way or unethical breeding.

16. Can Hamster Swim

Technically, a hamster can swim. However, they don’t like it and they hate getting wet. It is also can be stressful and scary for your hamster to be placed in a tub or sink full of water. To keep your hamster clean, use a sandbox and sand bath instead of washing them with water. You can read more about a hamster, swimming, and how to dry them if they accidentally got wet in this article.

17. Hamsters need massive space and bigger toys

Why Do Hamsters Run on Wheels

Despite their size, hamsters actually need a spacious cage and bigger toys. This is one of the most common mistakes new hamster owners make. Most pet shops will want to sell you a colourful critter cage with an awfully sized wheel.

18. Male hamsters have big cherries

You read that right! Male hamsters have gigantic testes and I’m not exaggerating. Their balls are about half as big as their head. If it’s your first time seeing one, you would even think that your hamster is ill and needs to see a vet right away. But it’s all normal unless there are some skin infection or infected wound around it.


If you are thinking to have a pet hamster, it’s important that you are ready to provide the best and most suitable enclosure and toys to your hamster. Don’t waste your time and money buying bad hamster cages and unsafe toys. Learn about basic hamster necessities and how to provide ethical hamster care.

These are some of the interesting facts about hamsters that we’ve gathered. While some of these are just for “for your information and entertainment purposes” only, we’ve included a lot of facts about hamsters that are really useful to know, especially for people who are just planning to start caring for hamsters.

With that being said, a little research is all it takes to make a difference in our pets’ lives, especially hamsters. After all, we want to give our pets the most comfortable life under our care. If you have questions, suggestions or reactions, we’ll be happy to read them in the comment box below!


Learn more about hamsters before you get one as a pet. Check out our article of cool and interesting facts about hamsters via @thehamstercareblog

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