How long do Common Marmosets live?
In captivity common marmosets typically live 10-12 years, sometimes up to 16 years with excellent care. Wild lifespans are shorter.
What do Common Marmosets eat?
In the wild they feed on tree gum and sap, fruit, insects, spiders, and small vertebrates. In captivity they need a specialist marmoset diet: gum-based or nectar supplement, quality primate pellets, daily insects (crickets, mealworms), chopped fruit, and vegetables. Do NOT feed them banana-heavy or sugary diets, table food, or dog/cat food — nutritional imbalance causes bone disease and wasting.
Housing and space
Marmosets are arboreal and need a tall, multi-level, escape-proof enclosure with branches, hiding boxes, and climbing structures, kept warm (roughly 24-27°C / 75-80°F) and humidity-controlled. They must be kept with compatible social companions, never singly. A standard small cage is inadequate; they need vertical territory and daily supervised out-of-enclosure time in a safe room.
Common mistakes with Common Marmosets
The worst mistakes are keeping one alone (they are colony animals and fail without company), feeding fruit-sugar-heavy diets that cause metabolic bone disease, underestimating their lifelong veterinary and enrichment needs, and acquiring one where primate ownership is illegal or without a qualified exotic vet.
Beginner mistakes to avoid
- Keeping a marmoset singly — they are troop animals and decline without social companions.
- Feeding sugary fruit-heavy or inappropriate diets — leading to metabolic bone disease.
- Underestimating lifelong cost, enrichment, and specialist primate-vet needs.
- Owning one where primates are banned or unpermitted, and buying on impulse.