A monkey is any member of two of the three groupings of simian primates. These two groupings are the New World and Old World monkeys of which together there are 264 known extant species. Because of their similarity to monkeys, apes such as chimpanzees and gibbons are sometimes incorrectly called monkeys. Also, a few monkey species have the word "ape" in their common name. Because they are not a single coherent group, monkeys do not have any particular traits that they all share and are not shared with the remaining group of simians, the apes.
Some characteristics are shared among the groups; most New World monkeys have prehensile tails while Old World monkeys do not; some have trichromatic colour vision like that of humans, others are dichromats or monochromats. Although both the New and Old World monkeys, like the apes, have forward facing eyes, the faces of Old World and New World monkeys look very different though again, each group shares some features such as the types of noses, cheeks and rumps. To understand the monkeys, therefore, it is necessary to study the characteristics of the different groups individually.
A group of monkeys may be referred to as a mission of monkeys or a tribe of monkeys.
While a majority of monkey owners find other homes for them, such as zoos and monkey rescues, some people report having long and rewarding relationships with monkeys. Monkeys are known to get attached to their first owner so switching from one to another would not be a good idea. It is not easy for a monkey to get used to their new environment. Monkeys need to be placed in social areas. It might be bad for the monkey to place them in non-social areas which could lead to problems. It is not cheap to bring up a monkey. It becomes very costly when it comes to buying food and housing them. Some monkeys may even have special needs such as diets.
In most large metropolitan areas in the U.S. it is illegal to keep monkeys in the home; even in places where they are legal, a Department of Agriculture permit is usually required. Their legal status as pets varies in other countries. Permits may be issued to those who qualify in the caring of monkeys.
Macaques, especially Rhesus monkeys, and African green monkeys are widely used in animal testing facilities. This is primarily because of their relative ease of handling, their fast reproductive cycle (compared to apes) and their psychological and physical similarity to humans. In the United States, around 50,000 non-human primates, most of them monkeys, have been used in experiments every year since 1973 * (pdf); 10,000 monkeys were used in the European Union in 2004. Highly sociable animals, monkeys are kept in many different environments.
Use of monkeys in laboratories is highly controversial. Many claim that the practice is cruel and produces little information of value, and there have been many protests and instances of vandalism against it. However, defenders of testing on monkeys say that it has led to many important medical breakthroughs, and that the prevention of harm to humans should be a higher priority than the harm done to monkeys. The topic has become a popular cause for animal rights groups.
The following lists shows where the various monkey families (bolded) are placed in the Primate classification. Note that the smallest grouping that contains them all is the Simiiformes, the simians, which also contains the apes. Calling apes monkeys is incorrect. Calling either a simian is correct.
Monkeys are prevalent in numerous books, television programs, and movies. The television series Monkey, the literary characters Monsieur Eek and Curious George are all examples.
However, pop culture often incorrectly labels apes, particularly chimpanzees, gibbons, and gorillas, as monkeys. Terry Pratchett makes use of this trait in his Discworld novels, in which the Librarian of the Unseen University is an orangutan who gets very violent if referred to as a monkey.
Lazlo is a Brazilian monkey from Cartoon Network's Camp Lazlo. His personality closely resembles that of Spongebob Squarepants.
Aap | قرد | Kâu | སྤྲེའུ་ | Abe | Affen | Mono | Simio | Singe | קוף | 원숭이 | Simio | Apen | Marmoûset | Macaco | Monkey | Monyét | ลิง | Khỉ | 猴