Black-striped capuchin

The black-striped capuchin is a New World monkey and a member of the Cebidae family, which contains both capuchins and squirrel monkeys. Until the past few decades{{when?|date=March 2024}}, the black-striped capuchin was considered a subspecies of the tufted capuchin but has slowly become accepted as a separate species over time.{{Cite book|last=Groves|first=Colin P|title=Primate Taxonomy|publisher=Smithsonian Institution Press|year=2001}}{{Cite journal|last=Seamons|first=G.R.|date=July 2006|title=Mammal Species of the World: A Taxonomic and Geographic Reference (3rd edition)2006269Edited by Don E. Wilson and DeeAnn M. Reeder. Mammal Species of the World: A Taxonomic and Geographic Reference (3rd edition). Baltimore, MD: Johns Hopkins University Press 2005. , {{text|ISBN}}: 0 8018 8221 4 £83.50 $125 2 vols|url=http://dx.doi.org/10.1108/09504120610673024|journal=Reference Reviews|volume=20|issue=5|pages=41–42|doi=10.1108/09504120610673024|issn=0950-4125}} Even within the black-striped capuchin species, we see more taxonomical debate, as the southern population is sometimes considered a species of its own as well, called Azaras's capuchin.

In black-striped capuchins, we see an interesting mating behavior. When a female decides she is ready to mate, she will follow a male around attempting to get his attention. This can happen in various forms, one that has been described is the act of throwing rocks and sticks.{{Cite journal|last1=Falótico|first1=Tiago|last2=Ottoni|first2=Eduardo B.|date=2013-11-21|title=Stone Throwing as a Sexual Display in Wild Female Bearded Capuchin Monkeys, Sapajus libidinosus|journal=PLOS ONE|language=en|volume=8|issue=11|pages=e79535|doi=10.1371/journal.pone.0079535|issn=1932-6203|pmc=3836890|pmid=24278147|bibcode=2013PLoSO...879535F |doi-access=free }} Males will react first with disinterest and aggression, this is followed by a behavior dubbed "touch and go". Females will touch a male, and then flee before the male can inflict aggression. After some time, males react with interest and the pair can mate.

Females have offspring on average once every two years to a single infant. This infant will be initially carried on the mothers belly, but will transition to her back. They forage independently at two years of age, and are weaned slowly.

Black-striped capuchins have only a few physical features that distinguish them from other tufted capuchins. Similarly, to other tufted capuchins they have thick and strong tails. They have fur colored light to dark brown on their body, with darker black fur on their tail, arms, legs, and head. They get the name "bearded capuchin" because they tend to have darker faces, but lighter hair around their mouth and lower face. As they reach sexual maturity, they get dark spots on their head as well as sideburns on their face. Yet the features that most distinguish them include their orange fur on their neck as well as their yellow tinted fur on their dorsal side.

Males and females often have a similar height of around 37 cm (14.6 in) but show strong sexual dimorphism in their weights, with males around 3.5 kg and females around 2.1 kg.{{Cite journal|last1=Fragaszy|first1=Dorothy M.|last2=Izar|first2=Patricia|last3=Liu|first3=Qing|last4=Eshchar|first4=Yonat|last5=Young|first5=Leigh Anna|last6=Visalberghi|first6=Elisabetta|date=2016|title=Body mass in wild bearded capuchins, (Sapajus libidinosus): Ontogeny and sexual dimorphism|journal=American Journal of Primatology|language=en|volume=78|issue=4|pages=473–484|doi=10.1002/ajp.22509|pmid=26637804 |s2cid=29713017 |issn=1098-2345|doi-access=free}} Black-striped capuchins look very similar to other tufted capuchins, but importantly, they have a lighter coloration on the lower portion of their face, which earned them their name. The bearded capuchin can live up to 25 years in the wild, but much longer when in captivity.

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The black-striped capuchin is best known for its use of tools. Their use of tools can be found in many aspects of their life and they were the first non-ape primate to have been documented using tools. They have been known to take nuts, place them on a stone anvil, and use another stone to crack them open. Aside from that, they have also been seen using tools to dig in the ground. Using tools to dig, they can find foods like roots, tubers, as well as scare prey out of hiding spots.{{Cite journal|last1=Spagnoletti|first1=Noemi|last2=Visalberghi|first2=Elisabetta|last3=Verderane|first3=Michele P.|last4=Ottoni|first4=Eduardo|last5=Izar|first5=Patricia|last6=Fragaszy|first6=Dorothy|date=2012-05-01|title=Stone tool use in wild bearded capuchin monkeys, Cebus libidinosus. Is it a strategy to overcome food scarcity?|url=https://www.sciencedirect.com/science/article/pii/S0003347212001169|journal=Animal Behaviour|language=en|volume=83|issue=5|pages=1285–1294|doi=10.1016/j.anbehav.2012.03.002|s2cid=1046994 |issn=0003-3472}} Sticks also seem to be used to probe as well as dip for honey in the wild. Stones play an interesting role in reproduction, as females will throw them at males for attention. The monkeys also have found ways to use tools as a form of intimidation. It has been shown that they also use stones to make loud noises in order to intimidate potential predators.{{Cite journal|last=Moura|first=Antonio Christian de A.|date=2007|title=Stone Banging by Wild Capuchin Monkeys: An Unusual Auditory Display|url=https://www.karger.com/Article/FullText/95684|journal=Folia Primatologica|language=english|volume=78|issue=1|pages=36–45|doi=10.1159/000095684|issn=0015-5713|pmid=17170555|s2cid=2988770 }}

Males have been seen to use sticks and tools more often than females. When studied, it was clear that females use tools at the same rate as males for the first 10 months, but after that, due to environmental surroundings, they use sticks less and less compared to males.{{Cite journal|last1=Falótico|first1=Tiago|last2=Ottoni|first2=Eduardo B.|date=2014-10-01|title=Sexual bias in probe tool manufacture and use by wild bearded capuchin monkeys|url=https://www.sciencedirect.com/science/article/pii/S0376635714002411|journal=Behavioural Processes|language=en|volume=108|pages=117–122|doi=10.1016/j.beproc.2014.09.036|pmid=25446625 |s2cid=8170698 |issn=0376-6357}}{{Cite journal|last1=Falótico|first1=Tiago|last2=Bueno|first2=Carolina Q.|last3=Ottoni|first3=Eduardo B.|date=2021|title=Ontogeny and sex differences in object manipulation and probe tool use by wild tufted capuchin monkeys (Sapajus libidinosus)|url=https://onlinelibrary.wiley.com/doi/abs/10.1002/ajp.23251|journal=American Journal of Primatology|language=en|volume=83|issue=5|pages=e23251|doi=10.1002/ajp.23251|pmid=33666265 |s2cid=232122464 |issn=1098-2345}}

This use of tools is a very well defined trait in black-striped capuchins and has been traced back over three thousand years.{{Cite journal|last1=Falótico|first1=Tiago|last2=Proffitt|first2=Tomos|last3=Ottoni|first3=Eduardo B.|last4=Staff|first4=Richard A.|last5=Haslam|first5=Michael|date=July 2019|title=Three thousand years of wild capuchin stone tool use|url=https://www.nature.com/articles/s41559-019-0904-4|journal=Nature Ecology & Evolution|language=en|volume=3|issue=7|pages=1034–1038|doi=10.1038/s41559-019-0904-4|pmid=31235926 |bibcode=2019NatEE...3.1034F |s2cid=195329887 |issn=2397-334X}} This is so well defined that the forearm muscles in black-striped capuchins are well defined for complex tool use.{{Cite journal|last1=Aversi-Ferreira|first1=Tales Alexandre|last2=Maior|first2=Rafael Souto|last3=Carneiro-e-Silva|first3=Frederico O.|last4=Aversi-Ferreira|first4=Roqueline A. G. M. F.|last5=Tavares|first5=Maria Clotilde|last6=Nishijo|first6=Hisao|last7=Tomaz|first7=Carlos|date=2011-07-15|title=Comparative Anatomical Analyses of the Forearm Muscles of Cebus libidinosus (Rylands et al. 2000): Manipulatory Behavior and Tool Use|journal=PLOS ONE|language=en|volume=6|issue=7|pages=e22165|doi=10.1371/journal.pone.0022165|issn=1932-6203|pmc=3137621|pmid=21789230|bibcode=2011PLoSO...622165A |doi-access=free }}

In their natural environment, black-striped capuchins are diurnal and spend much of their day travelling in search of food, especially since they live in drier areas. This leads them to spend more time travelling terrestrially, primarily quadrupedally and rarely walking bipedally to use tools.

The diet consists of a wide range of foods. Fruits, nuts, insects, small vertebrates, flowers, and leaves.{{Cite journal|last1=Chalk-Wilayto|first1=Janine|last2=Ossi-Lupo|first2=Kerry|last3=Raguet-Schofield|first3=Melissa|date=2016-09-01|title=Growing up tough: Comparing the effects of food toughness on juvenile feeding in Sapajus libidinosus and Trachypithecus phayrei crepusculus|journal=Journal of Human Evolution|series=Food Materials Testing and its Relevance for Primate Biology|language=en|volume=98|pages=76–89|doi=10.1016/j.jhevol.2016.07.004|pmid=27544691 |issn=0047-2484|doi-access=free}}{{cite web|title=The black-striped capuchin (Sapajus libidinosus)|url=http://hfmoconservationandscience.weebly.com/17/post/2018/02/the-black-striped-capuchin-sapajus-libidinosus.html|access-date=2021-10-25|website=HFMO|language=en}} From this variety they especially eat fruits.

Black-striped capuchins can be found in northern and central Brazil. Specifically, in the Cerrados, Caatingas, and Pantanal of Brazil.

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Category:Capuchin monkeys

Category:Primates of Brazil

Category:Mammals of Argentina

Category:Mammals described in 1823

Category:Taxa named by Johann Baptist von Spix