The Celebes crested macaque (''Macaca nigra''), also known as the crested black macaque, Sulawesi crested macaque, or the black ape, is an Old World monkey that lives in the Tangkoko reserve in the northeastern tip of the

Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...

n island of

Sulawesi Sulawesi (), also known as Celebes (), is an island in Indonesia. One of the four Greater Sunda Islands, and the world's eleventh-largest island, it is situated east of Borneo, west of the Maluku Islands, and south of Mindanao and the Sulu Ar ...

(Celebes), as well as on smaller neighboring islands.

Description

Locally known as ''yaki'' or ''wolai'', its skin and hairless face is, with the exception of some white hair in the shoulder range, entirely jet black. Unusual for a primate, it has striking reddish-brown eyes. The long muzzle with high cheeks and the long hair tuft, or crest, at the top of the head are remarkable features. It has an "apelike" appearance due to its almost non-existent, non-visible, vestigial tail stub of only approximately . With a total body length of to and a weight of to , it is one of the smaller

macaque The macaques () constitute a genus (''Macaca'') of gregarious Old World monkeys of the subfamily Cercopithecinae. The 23 species of macaques inhabit ranges throughout Asia, North Africa, and (in one instance) Gibraltar. Macaques are principally ...

species. Its life expectancy is estimated at 15–20 years in the wild.

Ecology

The Celebes crested macaque is a diurnal rain forest dweller. This

is primarily terrestrial, spending more than 60% of its day on the ground foraging for food and socializing, while sleeping and searching for food in the trees. The Celebes crested macaque is

frugivorous A frugivore is an animal that thrives mostly on raw fruits or succulent fruit-like produce of plants such as roots, shoots, nuts and seeds. Approximately 20% of mammalian herbivores eat fruit. Frugivores are highly dependent on the abundance and ...

, with 70% of its diet consisting of

fruit In botany, a fruit is the seed-bearing structure in flowering plants that is formed from the ovary after flowering. Fruits are the means by which flowering plants (also known as angiosperms) disseminate their seeds. Edible fruits in particu ...

s. It also consumes

leaves A leaf (plural, : leaves) is any of the principal appendages of a vascular plant plant stem, stem, usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", wh ...

, buds,

seed A seed is an embryonic plant enclosed in a protective outer covering, along with a food reserve. The formation of the seed is a part of the process of reproduction in seed plants, the spermatophytes, including the gymnosperm and angiospe ...

fungus A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a kingdom, separately from th ...

, small

bird Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweigh ...

s and bird eggs,

insect Insects (from Latin ') are pancrustacean hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body ( head, thorax and abdomen), three pairs ...

s (such as

beetles Beetles are insects that form the order Coleoptera (), in the superorder Endopterygota. Their front pair of wings are hardened into wing-cases, elytra, distinguishing them from most other insects. The Coleoptera, with about 400,000 describ ...

and

caterpillar Caterpillars ( ) are the larval stage of members of the order Lepidoptera (the insect order comprising butterflies and moths). As with most common names, the application of the word is arbitrary, since the larvae of sawflies (suborder Sym ...

worm Worms are many different distantly related bilateral animals that typically have a long cylindrical tube-like body, no limbs, and no eyes (though not always). Worms vary in size from microscopic to over in length for marine polychaete wor ...

snails A snail is, in loose terms, a shelled gastropod. The name is most often applied to land snails, terrestrial pulmonate gastropod molluscs. However, the common name ''snail'' is also used for most of the members of the molluscan class Gastrop ...

and the occasional small

lizard Lizards are a widespread group of squamate reptiles, with over 7,000 species, ranging across all continents except Antarctica, as well as most oceanic island chains. The group is paraphyletic since it excludes the snakes and Amphisbaenia alt ...

frog A frog is any member of a diverse and largely Carnivore, carnivorous group of short-bodied, tailless amphibians composing the order (biology), order Anura (ανοὐρά, literally ''without tail'' in Ancient Greek). The oldest fossil "proto-f ...

Group behavior

It lives typically in groups of five to twenty-five animals, and occasionally in groups of up to seventy-five animals. Smaller groups have only a single adult male, while larger groups have up to four adult males. However, adult females always outnumber adult males by about 4:1. Young adult males are forced to leave their birth group upon maturity, sometimes forming bachelor groups before seeking a connection to an existing adult mixed-sex group. Communication consists of various sounds and gestures; such as the presentation of the long canine teeth while grimacing, a clearly threatening gesture. The Celebes crested macaque is promiscuous, with both males and females mating multiple times with multiple partners. The receptivity of the females is clearly indicated by an extreme tumescence (swelling) and redness of their buttocks which, in contrast to the black skin color, is particularly noticeable. The gestation time is 174 days, and the birth of the usually single offspring happens in the spring when food is more plentiful. Young animals are nursed for approximately one year, becoming fully mature in three to four years, females somewhat sooner than males.

Human interactions

Because it devastates crops and fields, the Celebes crested macaque is hunted as a pest. It is also hunted to provide

bushmeat Bushmeat is meat from wildlife species that are hunted for human consumption, most often referring to the meat of game in Africa. Bushmeat represents a primary source of animal protein and a cash-earning commodity for inhabitants of humid tropi ...

. Clearing the rain forests further threatens its survival. Its situation on the small neighbouring islands of Sulawesi (such as

Bacan The Bacan Islands, formerly also known as the Bachans, Bachians, and Batchians, are a group of islands in the Moluccas in Indonesia. They are mountainous and forested, lying south of Ternate and southwest of Halmahera. The islands are administe ...

) is somewhat better, since these have a low human population. The total population of the macaque on Sulawesi is estimated at 4,000–6,000, while a booming population of up to 100,000 monkeys is found on

. A series of survey trips to Sulawesi and the Minahasa forest area were made in 2004–2009 by Vicki Melfi, who is EEP studbook holder for these macaques, based at

Paignton Zoo Paignton Zoo is a zoo in Paignton, Devon, England. The zoo is part of South West Environmental Parks Ltd which is owned by the charity Wild Planet Trust, formerly known as the Whitley Wildlife Conservation Trust. The charity also runs Newquay ...

/ the

Whitley Wildlife Conservation Trust Wild Planet Trust, formerly known as the Whitley Wildlife Conservation Trust (WWCT), is a registered charity, set up to run Paignton Zoo after the death of its founder, Herbert Whitley, who established the zoo on his estate at Primley, Paignt ...

. She has been monitoring population density, which has declined from over 300 individuals per square kilometre in 1980 to 20 to 60 individuals today. A conservation programme called ''Selamatkan Yaki''—or "Save the ''Yaki''", as this macaque is known in the local language—was launched with local partners and other conservation groups from Thailand, Germany and the Wildlife Conservation Society (based in the United States). Both Newquay Zoo and

are among a number of mostly European zoos which hold ''

ex-situ Svalbard GLOBAL SEED BANK, an ''ex situ'' conservation. ''Ex situ'' conservation literally means, "off-site conservation". It is the process of protecting an endangered species, variety or breed, of plant or animal outside its natural habitat; ...

'' breeding populations of this animal. Since 2006, the ''Macaca Nigra Project'' has been studying the biology and promoting the conservation of this species. The project, a collaboration between the

German Primate Center The German Primate Centre (German: Deutsches Primatenzentrum, DPZ, founded in 1977) is a non-profit independent research and service institute located in Göttingen. It is a member of the Gottfried Wilhelm Leibniz Scientific Community and funded by ...

and the

Bogor Agricultural Institute IPB University (, abbreviated as IPB) is a state-run agricultural university based in the regency of Bogor, Indonesia. The institute began as an agricultural school formed by the Dutch colonial regime in the early 20th century. After independenc ...

, is run by Antje Engelhardt and located in the Tangkoko reserve, home of the biggest crested macaque population remaining in the species' original distribution range. Nevertheless, despite being critically endangered, crested black macaque are still unprotected outside of Tangkoko reserve and they are regularly hunted and slaughtered. They are easily caught and killed as they have no fear of humans. Crested black macaque is considered a delicacy by local residents. In 2013, wildlife cameraman Colin Stafford-Johnson spent time on Sulawesi, filming the monkeys at close quarters for a BBC documentary entitled "Meet the monkeys". In 2014, considerable discussion of copyright issues was generated by a "selfie" photograph taken by a Celebes crested macaque.

Gallery

File:Naturalis Biodiversity Center - ZMA.MAM.12434 lat - Macaca nigra Desmarest - skull.jpeg, Skull and a jaw bone at the Naturalis Biodiversity Center in

Leiden Leiden (; in English and archaic Dutch also Leyden) is a city and municipality in the province of South Holland, Netherlands. The municipality of Leiden has a population of 119,713, but the city forms one densely connected agglomeration wit ...

, Netherlands File:Black ape (6915998147).jpg, Skeleton in the

Miguel Mendez --> Miguel is a given name and surname, the Portuguese and Spanish form of the Hebrew name Michael (given name), Michael. It may refer to: Places *Pedro Miguel, a parish in the municipality of Horta and the island of Faial in the Azores Islands ...

, Malahide, Ireland File:Crested Black Macaque (4043624542).jpg, Two celebes macaques grooming each other at the Diergaarde Blijdorp in the

Rotterdam Rotterdam ( , , , lit. ''The Dam on the River Rotte'') is the second largest city and municipality in the Netherlands. It is in the province of South Holland, part of the North Sea mouth of the Rhine–Meuse–Scheldt delta, via the ''"N ...

, Netherlands Image:Macaca nigra juvenile (Buffalo Zoo).jpg, Juvenile Celebes crested macaque at the

Buffalo Zoo Buffalo Zoo is a zoo was located at 300 Parkside Ave in Buffalo, New York, is the seventh oldest zoo in the United States. Each year, the Buffalo Zoo welcomes approximately 400,000 visitors and is the second largest tourist attraction in Western N ...

in Buffalo, New York File:Celebes crested macaque (13968482373).jpg, A celebes macaque eating leaf File:Crested Macaque Macaca nigra (7911419924).jpg, A celebes macaque trying to eat coconut at the Tangkoko National Park,

, Indonesia

References

External links

*ARKive
images and movies of the crested black macaque ''(Macaca nigra)''

Primate Info Net ''Macaca nigra'' Factsheet

Macaca Nigra Project
{{Taxonbar, from=Q280590 Celebes crested macaque Endemic fauna of Indonesia Mammals of Sulawesi Primates of Indonesia Critically endangered fauna of Asia Celebes crested macaque Taxa named by Anselme Gaëtan Desmarest