Sep 4, 2019 · Researchers have revealed that chimpanzees and bonobos share the contrasting color pattern seen in human eyes, which makes it easy for them to detect the direction of someone's gaze from a...

Bonobos are distinguished from common chimpanzees by relatively long limbs, pinker lips, a darker face, a tail-tuft through adulthood, and parted, longer hair on their heads. Some individuals have sparser, thin hair over parts of their bodies.

Eye gaze is widespread in nonhuman primate taxa and important for social cognition and communicative signaling. Bonobos and chimpanzees, two closely related primate species, differ in social organization, behavior, and cognition. Chimpanzees’ eye gaze and gaze following has been studied extensively, whereas less is known about bonobos’ eye ...

A human experimenter, observed by either a human infant, a gorilla, a bonobo, or a chimpanzee, did one of four actions: Tilted his head up while closing his eyes; Looked at the ceiling with his eyes while keeping his head stationary; Looked at the ceiling with his head and his eyes; Looked straight ahead without moving his head or his eyes

Sep 3, 2019 · We suggest that whether gaze is conspicuous or cryptic is driven not by absolute depigmentation of the sclera but by the relative contrast between sclera and iris. We compare chimpanzee, bonobo, and human eye morphology. We show that, like humans, bonobo sclerae are lighter relative to their irises.

Jun 21, 2021 · Gibbons display darker eyes than great apes and expose less sclera. Iridoscleral contrasts in orangutans and gorillas approach the human condition but differ between congeneric species.

Sep 4, 2019 · Findings revealed that chimpanzees and bonobos share the contrasting colour pattern seen in human eyes, which makes it easy for them to detect the direction of someone’s gaze from a distance.

Eye gaze is widespread in nonhuman primate taxa and important for social cognition and communicative signaling. Bonobos and chimpanzees, two closely related primate species, differ in social organization, behavior, and cognition.

The research team contrasted the sclerae and irises of humans, bonobos and chimpanzees and found that they showed similar distinct eye patterns. Studies have suggested that the contrast between the white of human eyes — known as the sclerae — and the colourful irises allows others to detect the direction of our gaze.

Sep 19, 2019 · Chimpanzees and bonobos share the contrasting color pattern seen in human eyes, which makes it easy for them to detect the direction of someone’s gaze from a distance.

Aug 20, 2024 · Black face, ears, palms and soles of feet; individuals in managed care may have lighter pigmentation. Black body hair is long and fine. Many adults retain the white rump tuft common to infants. Hair on top of head appears to be …

Sep 4, 2019 · Findings revealed that chimpanzees and bonobos share the contrasting color pattern seen in human eyes, which makes it easy for them to detect the direction of someone's gaze from a distance.

Nov 11, 2022 · In humans, our analysis showed a small but significant attentional bias towards dilated pupils compared to intermediate-sized pupils and intermediate-sized pupils when compared to small pupils. Our analysis did not show a significant effect in bonobos.

Jun 15, 2015 · Bonobos fixated the eyes rapidly, even immediately after the picture presentation, and chimpanzees showed an opposite pattern; fixating the mouth rather than the eyes. In addition, bonobos viewed the eyes longer than chimpanzees independently of whether the presented stimulus was a conspecific face or an allospecific chimpanzee’s face.

Jun 22, 2021 · As adults, bonobos have pink contours around their lips and eyes. Unlike chimps, they have black ears, longer head hair that parts in the middle of their head, and tufts of cheek hair.

Sep 2, 2019 · Bonobos, like humans, have paler sclera and darker irises, but chimpanzees have a different pattern: very dark sclera, and paler irises. Both colour patterns show the same type of contrast seen in human eyes and could help other apes find out where they are looking.

Sep 3, 2019 · Findings revealed that chimpanzees and bonobos share the contrasting colour pattern seen in human eyes, which makes it easy for them to detect the direction of someone’s gaze from a distance.

The distance the bonobo holds its eye from its partner's fur is a measure of how good its close vision is. The scientists photographed fourteen bonobos, whose ages they knew, while they were...

Jun 15, 2015 · Using eye-tracking we examined the bonobos’ and chimpanzees’ spontaneous scanning of pictures that included eyes, mouth, face, genitals, and action target objects of conspecifics.

While chimps are characterised by aggressive male dominance, bonobos are matriarchal, altruistic, and generally pretty chilled. They are distinguished in appearance from chimps by their often more slender body shape, longer limbs, darker face and pinker lips.