Western Pygmy Marmoset
Cebuella pygmaea
- KingdomAnimalia (Animals)
- PhylumChordata (Cordats)
- ClassMammalia (Mamífers)
- OrderPrimates
- FamilyCallitrichidae (Marmosets and Tamarins)
- GenusCebuella (Pygmy marmosets)
- SpeciesCebuella pygmaea (Western Pygmy Marmoset)
The western pygmy marmoset (Cebuella pygmaea) is a marmoset species, a very small New World monkey found in the northwestern Amazon rainforest in Brazil, Colombia, Ecuador, and Peru. It was formerly regarded as conspecific with the similar eastern pygmy marmoset, which has whitish underparts. Although the western pygmy marmoset occurs further west than the eastern pygmy marmoset, the primary separators of their ranges are the Amazon River (Solimões River) and Marañón River, with the western occurring to the north of them and the eastern to the south. Wikipedia →
30–40% of wildlife watchers report a Western Pygmy Marmoset sighting in Yasuní National Park, based on 65 days of visitor records from GBIF citizen-science data.
Closest Relatives at Yasuní National Park
Golden-mantled Tamarin
Leontocebus tripartitus
Black-mantled Tamarin
Leontocebus nigricollis
Red-mantle Saddle-back Tamarin
Leontocebus lagonotus
Common Woolly Monkey
Lagothrix lagothricha
Ecuadorian Squirrel Monkey
Saimiri macrodon
Colombian Red Howler Monkey
Alouatta seniculus
White-tailed Titi
Plecturocebus discolor
Marañón white-fronted capuchin
Cebus yuracus
Napo Saki
Pithecia napensis
Long-haired Spider Monkey
Ateles belzebuth
Noisy Night Monkey
Aotus vociferans
Lucifer Titi
Cheracebus lucifer
📅 Monthly Probability
☀️ When They're Spotted
Most active during daytime hours (6am–6pm) · across all parks (global)
Global Distribution
Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.
where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is) · parks where it occurs — tap a pin for the sighting probability there
Parks Where Found
| # | Park | Country | Probability |
|---|---|---|---|
| 1 | Cuyabeno Wildlife Reserve | 🇪🇨 Ecuador | |
| 2 | Yasuní National Park | 🇪🇨 Ecuador | |
| 3 | Amacayacu National Natural Park | 🇨🇴 Colombia |
Quick answers
What are the chances of seeing a Western Pygmy Marmoset in Yasuní National Park?
About 33% of wildlife watchers report a Western Pygmy Marmoset sighting in Yasuní National Park, based on 65 days of visitor records from GBIF citizen-science data.
When is the best time to see Western Pygmy Marmoset in Yasuní National Park?
November has the highest sighting rate for Western Pygmy Marmoset in Yasuní National Park in our monthly data.