Most cases of such behavior have been attributed to the resource competition hypothesis, in which females can gain more access to resources for herself and for her young by killing unrelated infants.
In monkeys and apes, some mothers occasionally display violent behavior towards their infants and a few others abandon their infants shortly after birth. In macaque monkeys, infant abuse generally occurs in the first two to three months of infant life.
Natural selection has meant that animal mothers reject the weaker offspring to prevent predation by other species and give longevity to their own, bolstering generations of animals to come. In large, wild mammals, litters are a lot smaller than in domestic animals like cats and dogs.
Scratching helps boost social bonding and reduce stress in monkeys.
Oral sex has been observed throughout the animal kingdom, from dolphins to primates.
Rhesus macaques oogle their babies just like human mothers do. It's a look that's been painted and photographed untold times: a mother gazing deep into her infant's eyes while the two smile and kiss. Psychologists believe this interplay helps a child's emotional and cognitive development.
The monkeys overwhelmingly chose the cloth mother, with or without food, only visiting the wire mother that had food when needing sustenance. Later in his career, he cultivated infant monkeys in isolation chambers for up to 24 months, from which they emerged intensely disturbed.
Something About Scents
Scent glands are generally found in the anogenital area, chest and armpits. They secrete a semi-liquid collection of chemicals. A monkey seen sniffing another's butt is simply gathering information from these glands at the base of the tail.
Gentle Moms
And they found that, just like people and chimps, macaques can be very tender. The researchers observed macaque moms gently bouncing their young, holding their heads and trying to attract their gaze. And when the monkey moms made lip smacks, their babies often responded in kind.
“Small-bodied and vulnerable adolescent female Japanese macaques may prefer to engage in relatively safer sexual interactions with female monkey sexual partners in lieu of riskier sexual interactions with more aggressive male mates,” Gunst-Leca says, explaining that sometimes humping other animals is safer than hooking ...
A 24-year-old chimp in Japan has a genetic disorder similar to Down Syndrome in humans, researchers have found. Kanako is only the second chimpanzee known to have the chromosomal defect trisomy 22. The disorder has stunted her growth, left her blind and resulted in a congenital heart disease and underdeveloped teeth.
Macaque monkeys grow up with their mothers and are often not familiar with their fathers. But they can recognise the paternal side of the family even without ever being introduced to them, according to a study published in the journal Current Biology.
At least one other macaque species has been recorded eating infants: Taihangshan macaques of China. Bonobos and chimpanzees also sometimes practice infant cannibalism. Many primates carry their dead infants for days, but rarely do they eat them.
Monkeys, apes and other simians have nothing quite like our tears. They have tear ducts to help keep their eyes lubricated and clean. But they don't drain when they're sad. Chimps will scrunch up their faces and make noise when they're in distress, but they don't connect the tears and the wailing.
Abstract. Play signals are viewed as important means by which animals inform each other that bites, strikes, and throws that occur during play fighting are indeed playful rather than serious. One such signal is the open mouth play face that is common in primates and many other mammals.
In primates, showing the teeth, especially teeth held together, is almost always a sign of submission. The human smile probably has evolved from that. "In the primate threat, the lips are curled back and the teeth are apart--you are ready to bite.
Capuchin monkeys wash their feet and hands in urine to get comfort or sex, research now suggests. Capuchin monkeys wash their feet and hands in urine to get comfort or sex, research now suggests. Many species of monkeys rinse their feet and hands in their own waste by urinating on their hands and rubbing their feet.
Researchers have found that rhesus macaque monkeys engage in very similar behavior, in which baby monkeys pitch screaming fits until their mothers give in and feed them in order to prevent attacks from irritated onlookers.
The researchers found that the mothers would gaze intently at their newborns, sometimes even taking their baby's face with their hands and gently pulling it towards them to get an even closer look.
The infant would only go to the wire mother when hungry. Once fed it would return to the cloth mother for most of the day. If a frightening object was placed in the cage the infant took refuge with the cloth mother (its safe base). This surrogate was more effective in decreasing the youngsters fear.
These monkeys live in monogamous family groups that consist of the mother, father and offspring. The father is the main caretaker for the infants. He brings the infant to her mother to nurse. Infant monkeys are weaned at five months old.
Lip smacking is a social behavior that usually results in friendly interactions between monkeys in a social group. Often, a monkey will lip smack to a more dominant monkey as a sign of submission.
Shattering the long-held belief that humans are the only animals on earth to come to one another's aid during the birthing process, researchers in China have captured the first photographic evidence that monkeys too might sometimes help a mother deliver her baby.
For a species without pair-bonds where it was assumed fathers didn't know which infants were their own, this is an important finding.” Male chimpanzees have paternal recognition and invest in their offspring, not just on future mating. The researchers also found males spend time grooming and caring for their offspring.