Animal Size

Goeldi’s marmoset size: How big do they get?

How big does a Goeldi’s marmoset get? Here is an overview over the average adult age:

A grown Goeldi’s marmoset (Callimico goeldii) reaches an average size of 28 cm (1′ 0″).

When born, they have an average size of 0 cm (0′ 0″). During their lifetime of about 17.83 years, they grow from 50 grams (0.11 lbs) to 558 grams (1.23 lbs). A Goeldi’s marmoset has 1 babies at once. The Goeldi’s marmoset (genus: Callimico) is a member of the family Callitrichidae.

As a reference: Humans reach an average body size of 1.65m (5′ 5″) while carrying 62 kg (137 lbs). A human woman is pregnant for 280 days (40 weeks) and on average become 75 years old.

The average adult size of a Goeldi's marmoset is  (1' 0

The Goeldi’s marmoset or Goeldi’s monkey (Callimico goeldii) is a small, South American New World monkey that lives in the upper Amazon basin region of Bolivia, Brazil, Colombia, Ecuador, and Peru. It is the only species classified in the genus Callimico, and the monkeys are sometimes referred to as “callimicos”.Goeldi’s marmosets are blackish or blackish-brown in color and the hair on their head and tail sometimes has red, white, or silverly brown highlights. Their bodies are about 8–9 inches (20–23 cm) long, and their tails are about 10–12 inches (25–30 cm) long.Goeldi’s marmoset was first described in 1904, making Callimico one of the more recent monkey genera to be described. In older classification schemes it was sometimes placed in its own family Callimiconidae and sometimes, along with the marmosets and tamarins, in the subfamily Callitrichinae in the family Cebidae. More recently, Callitrichinae has been (re-)elevated to family status as Callitrichidae.Females reach sexual maturity at 8.5 months, males at 16.5 months. The gestation period lasts from 140 to 180 days. Unlike other New World monkeys, they have the capacity to give birth twice a year. The mother carries a single baby monkey per pregnancy, whereas most other species in the family Callitrichidae usually give birth to twins. For the first 2–3 weeks the mother acts as the primary caregiver until the father takes over most of the responsibilities except for nursing. The infant is weaned after about 65 days. Females outnumber males by 2 to 1. The life expectancy in captivity is about 10 years. The monkeys are able to jump as far as one end of a tennis court to another.Goeldi’s marmosets prefer to forage in dense scrubby undergrowth; perhaps because of this, they are rare, with groups living in separate patches of suitable habitat, separated by miles of unsuitable flora. In the wet season, their diet includes fruit, insects, spiders, lizards, frogs, and snakes. In the dry season, they feed on fungi, the only tropical primates known to depend on this source of food. They live in small social groups (approximately six individuals) that stay within a few feet of one another most of the time, staying in contact via high-pitched calls. They are also known to form polyspecific groups with tamarins, perhaps because Goeldi’s marmosets are not known to have the X-linked polymorphism which enables some individuals of other New World monkey species to see in full tri-chromatic vision.The species takes its name from its discoverer, the Swiss naturalist Emil August Goeldi.

Animals of the same family as a Goeldi’s marmoset

We found other animals of the Callitrichidae family:

Animals with the same size as a Goeldi’s marmoset

Not that size really matters, but it makes things comparable. So here are a couple of animals that are as big as Goeldi’s marmoset:

Animals with the same litter size as a Goeldi’s marmoset

Here is a list of animals that have the same number of babies per litter (1) as a Goeldi’s marmoset:

Animals with the same life expectancy as a Goeldi’s marmoset

Completely different animals, but becoming as old as a Goeldi’s marmoset:

Animals with the same weight as a Goeldi’s marmoset

As a comparison, here are some other animals that weight as much as the Callimico goeldii: