Species Name: Microcebus berthae
Weighing just over an ounce, Berthe's mouse lemur is the world's smallest primate. Endemic to dwindling western Madagascar forests, this nocturnal insectivore faces grave threats from deforestation and predation despite recent habitat protections. Learn surprising facts about its characteristics, behavior, endangered status, and the conservation efforts crucial to saving this tiny species.
Species Name: Hapalemur griseus
The eastern lesser bamboo lemur (Hapalemur griseus) is a small, endangered rainforest primate found only in Madagascar. This unique species has adapted to specialize in a toxic bamboo diet other animals cannot consume. Yet habitat loss and hunting have left remaining populations highly vulnerable.
Species Name: Eulemur mongoz
Learn about the endangered mongoose lemur (Eulemur mongoz), a small Madagascar primate with red beards and bushy tails. Get fascinating facts on their rainforest habits, unique behaviors, seed dispersal ecology, and major threats driving their worrying decline.
Species Name: Eulemur flavifrons
Discover the mysterious blue-eyed black lemur, a rare primate found only in the tropical forests of northwestern Madagascar. With striking blue eyes and mostly black fur, they are agile tree-dwellers feeding on fruits, leaves, and insects. Read about their lifestyle, endangered status, and the threats they face.
Species Name: Hapalemur aureus
Explore all about the magnificent yet critically endangered golden bamboo lemur of Madagascar. This unique primate depends almost entirely on giant bamboo for food and shelter. Read about their adaptations, ecology, reproduction, conservation efforts, and threats facing their fragile habitat.
Species Name: Macaca siberu
The Siberut macaque (Macaca siberu) is an endangered macaque species native to the island of Siberut in Indonesia. It was previously thought to be conspecific with the Pagai Island macaque (Macaca pagensis), which is paler overall, but this arrangement was polyphyletic.
Species Name: Pygathrix cinerea
The gray-shanked douc langur (Pygathrix cinerea) is a species of douc endemic to the Vietnamese provinces of Gia Lai, Quảng Ngãi, Kon Tum, Bình Định, and Quảng Nam. Genetically, Gray-shanked douc langurs are similar to Red-shanked douc langurs (Pygathrix nemaeus).
Species Name: Mico munduruku
The Munduruku marmoset (Mico munduruku) is a marmoset native to Brazil. It is only found in the southern Amazon over an area of about 120,000 km square, from the right bank of the Jamanxim River below the mouth of the Novo River to the mouth of the Tapajós River.
Species Name: Pithecia mittermeieri
Mittermeier's Tapajós Saki (Pithecia mittermeieri) is a disputed species of saki monkey, a type of New World monkey. Populations of this species were previously classified as Tapajós River saki (Pithecia irrorata). Still, a 2014 study described these populations as a separate species, Pithecia mittermeieri, based on their distinctive fur.
Species Name: Pithecia milleri
Miller's Saki (Pithecia milleri), also called Miller's monk saki, is a species of the saki family, a type of New World monkey. Miller's sakis are diurnal and quadrupedal leapers. They usually move on all fours but can be seen swinging bipedally on large branches before leaping to another tree.
Species Name: Saguinus martinsi
Martin's tamarin (Saguinus martinsi) or Martin's ochraceous bare-faced tamarin, is native to Brazil. These tamarins are distinguished from other New World monkeys by their small size and modified claws instead of nails on all digits except the big toe.
Species Name: Plecturocebus oenanthe
The Río Mayo titi (Plecturocebus oenanthe), also known as the San Martín titi, is native to the San Martín region of Peru and is considered Peru's most endangered primate. Río Mayo titis have been described as somewhat temperamental and hesitant and don't tend to be inquisitive.
Species Name: Cebus cesarae
The Río Cesar white-fronted capuchin (Cebus cesarae) is a gracile capuchin monkey native to the Cesar River Valley in northern Colombia. Like other monkeys of the genus Cebus, the Río Cesar white-fronted capuchin is named after the order of the Friar Capuchins because the crests of these friars closely resemble the coloring of the monkey's head.
Species Name: Chiropotes albinasus
The white-nosed saki (Chiropotes albinasus) is bearded, a New World monkey species native to the Amazon rainforest of south-central Brazil. White-nosed sakis are sometimes found in large social groups of 18-30 individuals. Their main reason for traveling is the food search.
Species Name: Alouatta belzebul
The red-handed howler monkey (Alouatta belzebul) is an endangered species of howler monkey, a New World species. Red-handed howler monkeys are diurnal, although they spend most of the day (up to 80%) sleeping on tree branches with members of their squad.
Species Name: Saguinus leucopus
The white-footed tamarin (Saguinus leucopus), the silvery-brown bare-faced tamarin, is native to Colombia. It is silvery brown with pale stripes and reddish underparts. It closely resembles the cotton-tipped tamarin from which it is separated by the Atrato River.
Species Name: Cebus leucocephalus
The Sierra de Perijá white-fronted capuchin monkey (Cebus leucocephalus) is a species of gracile capuchin monkey native to Venezuela and Colombia. The Sierra de Perijá white-fronted capuchin range is restricted to northwestern Venezuela and northern Colombia forests.
Species Name: Cebus cuscinus
The shock-headed capuchin (Cebus cuscinus) is a gracile capuchin monkey native to Peru and Bolivia. This New-world monkey was previously classified as a subspecies of the Humboldt's capuchin (Cebus albifrons), but in 2013 Rylands and Mittermeier raised it to a separate species, following genetic studies done by Boubli et al. in 2012, and Lynch Alfaro et al. in 2010.
Species Name: Mico humeralifer
The Santarem marmoset (Mico humeralifer), also called the black-and-white tassel marmoset, is a marmoset native to the Amazon and Pará states of Brazil. Santarem marmosets make long cries with their rapidly vibrating tongue, designed to sound like a cricket, and shorter chirps.
Species Name: Cebus malitiosus
The Santa Marta white-fronted capuchin (Cebus malitiosus) is a species of gracile capuchin monkey native to Colombia. The Santa Marta white-fronted capuchin range is restricted to forests near northern Colombia's northwestern base of the Sierra de Santa Marta.
Species Name: Pithecia rylandsi
The Ryland's Bald-Faced Saki (Pithecia rylandsi) is a controversial species of saki monkey, a New World monkey species. It is one of the largest sakis. This South American monkey was named after Brazilian primatologist Anthony Rylands, a former professor of vertebrate zoology at the Federal University of Minas Gerais and founding editor of the journal Neotropical Primates.
Species Name: Mico rondoni
Rondon's Marmoset (Mico rondoni), also called the Rondônia marmoset, is a small species of monkey in the Callitrichidae family found in the southwestern Amazon of Brazil. Rondon's marmoset was only described in 2010, and its name refers to the famous Amazon explorer Cândido Rondon.
Species Name: Callithrix kuhlii
The Wied's marmoset (Callithrix kuhlii), also called the Wied's black-tufted-ear marmoset, is a New World monkey that lives in the tropical and subtropical forests of eastern Brazil. Unlike other common marmosets, Wied's marmosets live in groups consisting of 4 or 5 females and 2 or 3 males (plus juveniles).
Species Name: Cebus versicolor
The Varied white-fronted capuchin (Cebus versicolor) is a species of gracile capuchin monkey endemic to Colombia. The Varied white-fronted capuchin lives in the lowland rainforests and palm swamps of the Magdalena River Valley in northern Colombia.
Species Name: Cebus unicolor
Spix's White-fronted Capuchin (Cebus unicolor) is a species of a gracile capuchin monkey. The species is widespread in the upper Amazon basin in Peru and Brazil. It is also present in northern Bolivia. According to the genetic studies by Boubli et al., Ryland and Mittermeier elevated it to a distinct species.
Species Name: Alouatta discolor
Spix's Red-Handed Howler (Alouatta discolor) is a species of howler monkey endemic to the southeastern Amazon in Brazil. Spix's Red-headed Howler is currently on the International Union for Conservation of Nature's Endangered Species List based on a population decline of more than 30% over the last 3 generations, mainly due to habitat loss.
Species Name: Lagothrix flavicauda
The Peruvian yellow-tailed woolly monkey (Lagothrix flavicauda), also called the yellow-tailed woolly monkey, is a New World monkey native to Peru. Peruvian yellow-tailed woolly monkey is among the rarest Neotropical primates and one of the largest mammals endemic to Peru.
Species Name: Cebus yuracus
The Peruvian white-fronted capuchin or Marañón white-fronted capuchin (Cebus yuracus) is a species of gracile capuchin monkey native to the upper Amazon basin. Peruvian white-fronted capuchin monkeys live in multi-male, multi-female groups of 5 to 18 individuals, with approximately equal numbers of males and females.
Species Name: Plecturocebus parecis
The Parecis titi (Plecturocebus parecis) is a species of titi, a New World monkey native to Brazil. The range of the new species is in the deforestation arc of the Amazon, where large tracts of forest are being destroyed for timber, settlements, and industrial agriculture.
Species Name: Cebus imitator
The Panamanian white-faced capuchin (Cebus mimic), also called the Panamanian white-headed capuchin or the Central American white-faced capuchin is a mid-sized New World monkey in the Cebidae family. Native to Central American forests, the Panamanian white-faced capuchin is vital to rainforest ecology for its role in seed and pollen dispersal.
Species Name: Aotus zonalis
The Panamanian night monkey or Chocoan night monkey (Aotus zonalis) is a species of night monkey formerly considered a subspecies of the grey-bellied night monkey in the Aotidae family. Panamanian night monkeys are sympatric with other species. They do not compete for resources with other animals in their range due to their alternate schedules.
Species Name: Plecturocebus ornatus
The ornate titi (Plecturocebus ornatus) is a species of titi and the smallest member of the Pitheciidae family, including the uakari and saki monkeys. Ornate titis have a monogamous mating system. A couple has a strong bond and stays together for years.
Species Name: Cacajao hosomi
The Neblina uakari (Cacajao hosomi), black-headed uakari, is a recently described monkey species from the extreme northwest of the Brazilian Amazon and adjacent southern Venezuela. Neblina uakari's English name refers to the Pico da Neblina, which marks its known distribution approximate center.
Species Name: Alouatta ululata
The Maranhão red-handed howler (Alouatta ululata) is native to forests (e.g., Babaçu forests) in the northeastern Brazilian states of Piauí, Maranhão, and Ceará. Red-handed howler monkeys are among the least studied species of all howler monkeys.
Species Name: Leontocebus illigeri
(Leontocebus illigeri) is a species of saddleback tamarin, a type of small monkey native to South America. Illiger's saddleback tamarin is native to the Peruvian Amazon, and its type locality is in Loreto, Peru, on the left bank of the lower Ucayali River.
Species Name: Cebuella niveiventris
The eastern pygmy marmoset is a species of marmoset, a tiny New World monkey found in the southwestern Amazon rainforest. Notably, at just over 100 grams (3.5 ounces), the eastern pygmy marmoset is the smallest monkey and among the smallest primates in the world.
Species Name: Callicebus coimbrai
or Coimbra titi is a species of titi, a New World primate native to the forests of the Brazilian states of Sergipe and Bahia. It is named in honor of Adelmar F. Coimbra-Filho, founder and former director of the Rio de Janeiro Primate Center, for his Brazilian biology and primatology work.
Species Name: Callicebus melanochir
The coastal black-handed titi is another species of titi, a New World primate native to the Atlantic Forest of northeastern Brazil. Coastal black-handed Titi monkeys vocalize synchronously early in the morning, possibly to announce their presence in their territory.
Species Name: Plecturocebus caquetensis
The caquetá titi also called the bushy-bearded titi or red-bearded titi, is a species of titi monkey native to Colombia in the Caquetá region. Dr. Marta Bueno, Thomas Defler, and their student Javier García of the National University of Colombia are credited with the 2008 discovery of the Caquetá-Titi monkey.
Species Name: Callithrix aurita
The buffy-tufted marmoset, also called the white-eared marmoset or buffy-tufted-ear marmoset is a New World monkey living in the forests of the Atlantic coast of southeastern Brazil. Unlike most marmoset monkeys, buffy-tufted-ear marmosets are mainly insectivorous, although their diet is generally carnivorous.