A free-ranging vervet monkey, baboon, or macaque recognizes other members of his group as individuals.
Even more strangely, the ranges of all but two of Vietnam's primates - the lesser slow loris and the bear macaque - are restricted to either the north or the south of the country.
Long-tailed macaque monkeys and silver leaf monkeys are ever-present.
Those species were chimpanzee, gorilla, orangutan, gibbon, macaque and owl monkey.
Jaw and tongue motions during suckling have been investigated in the macaque , opossum and pig.
Chimps and gorillas have been taught to use complex sign languages, Rhesus macaques demonstrate knowledge of basic math, and baboons are known to commonly deceive one another to their own ends.
In other words, if the urge to have sex is strong enough it may spill over into nonreproductive sex, as suggested by the actions of the bonobos and macaques .
As I reported in another recent post fetal alcohol exposure in early pregnancy or during the full length of pregnancy in rhesus macaque monkeys resulted in macaques that had blunted responses to stimuli.
Terrace's research with macaques (humble monkeys, not apes) casts doubt on the claim that only humans have declarative knowledge.
She said animals used for testing in phase one trials were mainly rodents and primates, in particular macaques and marmosets.