Sakis are small-sized monkeys with long, bushy tails. Their furry, rough skin is black, grey or reddish-brown in color depending upon the species. The faces of some species are naked, but their head is hooded with fur. Their bodies are adapted to life in the trees, with strong hind legs allowing them to make far jumps. Sakis reach a length of 30 to 50 cm, with a tail just as long, and weigh up to 2 kg.
Mating is non-seasonal, and can happen any time during the year. After approximately 150- to 180-day gestation, females bear single young. The young are weaned after 4 months, and are fully mature in 3 years. Their life expectancy is up to 30 years.
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Fernandez-Duque, Eduardo; Huck, Maren; Van Belle, Sarie; Di Fiore, Anthony (April 2020). "The evolution of pair-living, sexual monogamy, and cooperative infant care: Insights from research on wild owl monkeys, titis, sakis, and tamarins". American Journal of Physical Anthropology. 171 (S70): 118–173. doi:10.1002/ajpa.24017. ISSN 0002-9483. PMID 32191356. https://doi.org/10.1002%2Fajpa.24017
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Marsh, Laura K. (2014-08-01). "A Taxonomic Revision of the Saki Monkeys, Pithecia Desmarest, 1804". Neotropical Primates. 21 (1): 1–165. doi:10.1896/044.021.0101. ISSN 1413-4705. S2CID 86516301. https://bioone.org/journals/neotropical-primates/volume-21/issue-1/044.021.0101/A-Taxonomic-Revision-of-the-Saki-Monkeys-Pithecia-Desmarest-1804/10.1896/044.021.0101.full
Marsh, Laura K. (2014-08-01). "A Taxonomic Revision of the Saki Monkeys, Pithecia Desmarest, 1804". Neotropical Primates. 21 (1): 1–165. doi:10.1896/044.021.0101. ISSN 1413-4705. S2CID 86516301. https://bioone.org/journals/neotropical-primates/volume-21/issue-1/044.021.0101/A-Taxonomic-Revision-of-the-Saki-Monkeys-Pithecia-Desmarest-1804/10.1896/044.021.0101.full
Marsh, Laura K. (2014-08-01). "A Taxonomic Revision of the Saki Monkeys, Pithecia Desmarest, 1804". Neotropical Primates. 21 (1): 1–165. doi:10.1896/044.021.0101. ISSN 1413-4705. S2CID 86516301. https://bioone.org/journals/neotropical-primates/volume-21/issue-1/044.021.0101/A-Taxonomic-Revision-of-the-Saki-Monkeys-Pithecia-Desmarest-1804/10.1896/044.021.0101.full
Marsh, Laura K. (2014-08-01). "A Taxonomic Revision of the Saki Monkeys, Pithecia Desmarest, 1804". Neotropical Primates. 21 (1): 1–165. doi:10.1896/044.021.0101. ISSN 1413-4705. S2CID 86516301. https://bioone.org/journals/neotropical-primates/volume-21/issue-1/044.021.0101/A-Taxonomic-Revision-of-the-Saki-Monkeys-Pithecia-Desmarest-1804/10.1896/044.021.0101.full
Marsh, Laura K. (2014-08-01). "A Taxonomic Revision of the Saki Monkeys, Pithecia Desmarest, 1804". Neotropical Primates. 21 (1): 1–165. doi:10.1896/044.021.0101. ISSN 1413-4705. S2CID 86516301. https://bioone.org/journals/neotropical-primates/volume-21/issue-1/044.021.0101/A-Taxonomic-Revision-of-the-Saki-Monkeys-Pithecia-Desmarest-1804/10.1896/044.021.0101.full
Marsh, Laura K. (2014-08-01). "A Taxonomic Revision of the Saki Monkeys, Pithecia Desmarest, 1804". Neotropical Primates. 21 (1): 1–165. doi:10.1896/044.021.0101. ISSN 1413-4705. S2CID 86516301. https://bioone.org/journals/neotropical-primates/volume-21/issue-1/044.021.0101/A-Taxonomic-Revision-of-the-Saki-Monkeys-Pithecia-Desmarest-1804/10.1896/044.021.0101.full
Marsh, Laura K. (2014-08-01). "A Taxonomic Revision of the Saki Monkeys, Pithecia Desmarest, 1804". Neotropical Primates. 21 (1): 1–165. doi:10.1896/044.021.0101. ISSN 1413-4705. S2CID 86516301. https://bioone.org/journals/neotropical-primates/volume-21/issue-1/044.021.0101/A-Taxonomic-Revision-of-the-Saki-Monkeys-Pithecia-Desmarest-1804/10.1896/044.021.0101.full
Marsh, Laura K. (2014-08-01). "A Taxonomic Revision of the Saki Monkeys, Pithecia Desmarest, 1804". Neotropical Primates. 21 (1): 1–165. doi:10.1896/044.021.0101. ISSN 1413-4705. S2CID 86516301. https://bioone.org/journals/neotropical-primates/volume-21/issue-1/044.021.0101/A-Taxonomic-Revision-of-the-Saki-Monkeys-Pithecia-Desmarest-1804/10.1896/044.021.0101.full
Serrano-Villavicencio, J.E.; Murtado, C.M.; Vendramel, R.L.; Oliveira do Nascimento, F. (January 2019). "Reconsidering the taxonomy of the Pithecia irrorata species group (Primates: Pitheciidae)". Journal of Mammalogy. 100 (1): 130–141. doi:10.1093/jmammal/gyy167. https://doi.org/10.1093%2Fjmammal%2Fgyy167
Marsh, Laura K. (2014-08-01). "A Taxonomic Revision of the Saki Monkeys, Pithecia Desmarest, 1804". Neotropical Primates. 21 (1): 1–165. doi:10.1896/044.021.0101. ISSN 1413-4705. S2CID 86516301. https://bioone.org/journals/neotropical-primates/volume-21/issue-1/044.021.0101/A-Taxonomic-Revision-of-the-Saki-Monkeys-Pithecia-Desmarest-1804/10.1896/044.021.0101.full
Marsh, Laura K. (2014-08-01). "A Taxonomic Revision of the Saki Monkeys, Pithecia Desmarest, 1804". Neotropical Primates. 21 (1): 1–165. doi:10.1896/044.021.0101. ISSN 1413-4705. S2CID 86516301. https://bioone.org/journals/neotropical-primates/volume-21/issue-1/044.021.0101/A-Taxonomic-Revision-of-the-Saki-Monkeys-Pithecia-Desmarest-1804/10.1896/044.021.0101.full
Serrano-Villavicencio, J.E.; Murtado, C.M.; Vendramel, R.L.; Oliveira do Nascimento, F. (January 2019). "Reconsidering the taxonomy of the Pithecia irrorata species group (Primates: Pitheciidae)". Journal of Mammalogy. 100 (1): 130–141. doi:10.1093/jmammal/gyy167. https://doi.org/10.1093%2Fjmammal%2Fgyy167
Marsh, Laura K. (2014-08-01). "A Taxonomic Revision of the Saki Monkeys, Pithecia Desmarest, 1804". Neotropical Primates. 21 (1): 1–165. doi:10.1896/044.021.0101. ISSN 1413-4705. S2CID 86516301. https://bioone.org/journals/neotropical-primates/volume-21/issue-1/044.021.0101/A-Taxonomic-Revision-of-the-Saki-Monkeys-Pithecia-Desmarest-1804/10.1896/044.021.0101.full
Serrano-Villavicencio, J.E.; Murtado, C.M.; Vendramel, R.L.; Oliveira do Nascimento, F. (January 2019). "Reconsidering the taxonomy of the Pithecia irrorata species group (Primates: Pitheciidae)". Journal of Mammalogy. 100 (1): 130–141. doi:10.1093/jmammal/gyy167. https://doi.org/10.1093%2Fjmammal%2Fgyy167
Marsh, Laura K. (2014-08-01). "A Taxonomic Revision of the Saki Monkeys, Pithecia Desmarest, 1804". Neotropical Primates. 21 (1): 1–165. doi:10.1896/044.021.0101. ISSN 1413-4705. S2CID 86516301. https://bioone.org/journals/neotropical-primates/volume-21/issue-1/044.021.0101/A-Taxonomic-Revision-of-the-Saki-Monkeys-Pithecia-Desmarest-1804/10.1896/044.021.0101.full