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Marmoset Monkeys

Marmosets are small monkeys that live high up in the canopies of South American rainforests. There are more than 20 species, and most could fit comfortably in an adult human’s hand

Their hands and feet resemble those of squirrels, according to the ADW. Except for the big toe, which have nails, their digits have sharp claws. Also, the big toe and the thumb are not opposable. Marmosets, as well as their close cousins, tamarins, are considered to be the most primitive monkeys because of these anatomical characteristics, according to Dennis O’Neil, a professor of behavioral science at Palomar College in San Marcos, California.

Marmoset Monkeys as pets

Often called the finger monkey, these tiny monkeys grow the size of a barbie doll and weigh less than a pound as adults. Don’t let their adorable size and facial expressions fool you, they are very curious and highly intelligent. Because they are new world primates, they are the most difficult animals we raise, they require the most dedication and time, all the time. These monkeys have special requirements, not like other animals, including special lighting, diet, veterinary expertise, neutering, and more. They are highly specialized and are not easy to care for.  If you are seriously interested in obtaining a marmoset monkey please visit our Contact Page and fill in the form

Our Marmoset Monkeys

Marmoset Monkey information

Size & description

Marmosets have soft and silky hair, and many have tufts of hair or manes on either side of their faces, which are sparsely furred or naked, according to the Animal Diversity Web (ADW). There is a wide variety of colors among marmosets, from black to brown to silver to bright orange.

Marmosets tend to stay in the treetops and behave a lot like squirrels. They have long tails — longer than their bodies, usually — but unlike other New World monkeys (capuchins and squirrel monkeys, for example), their tails are not prehensile; that is, marmosets can’t use their tails to grasp things.


Marmosets are active during the day and spend their time foraging. They are social animals that live in small groups, called troops, made up of four to 15 relatives and are often territorial. A territory for a common marmoset troop, for example, can range from 5,000 to 65,000 square meters (1.2-16 acres), according to the National Primate Research Center at the University of Wisconsin.


Marmosets are omnivores, which means they eat a variety of foods. Their diet includes insects, fruit, tree sap and other small animals.

Pygmy marmosets love the sap of trees. They saw holes into the bark to get at the sap with their teeth and can make thousands of holes in a small selection of trees.

Other facts

Common marmosets can give birth to non-identical twins, which is unusual trait for primates.

Marmosets are often used for research on human aging and disease because their bodies are very close to those of humans.

Marmosets are sometimes kept as pets, but they are very difficult to care for. For example, they require a very specific diet and access to UV light to stay healthy.

What age do marmosets get adopted out?

Short answer- It depends on the marmoset. Our babies must reach special milestones before leaving, and the go-home age ranges from 8 weeks to 6 months. At JEAR we sell our babies fully weaned onto solid foods.

Be careful getting a baby too young, they require specialized care and hand-feedings that can be fatal if not done by a professional. The key milestone to want is to have the baby weaned, this needs to be taught by the mother marmoset. It is extremely hard for a human to teach a marmoset how to eat and what to eat properly. This is a huge problem in the Marmoset community. Insist on a weaned baby from your breeder.

What is the buying experience like?

Once we have a baby born we begin our specialized hand-raising process. During milestones, we assess to see the particular personality and habits of the individual baby. If we decide to place it in another home we will post it for sale on our website. 

Once we have a deposit placed t, we work closely with the new family for preparation and pickup.

At pickup, you get to meet your baby and take them home. We have all supplies ready to go and we spend time reviewing and instructions. Once you feel comfortable with your new baby you can take them home 🙂

We are very active with our past buyers and are available for any questions after you get home- call us don’t go on Google!