There’s an animal within the tropical forests of Borneo that breastfeeds its younger for six.5 years

Orangutans have lengthy lives, usually reaching 40 years outdated within the wild. Now, a brand new examine has revealed that these nice apes have one of many longest breastfeeding durations amongst mammals.

The analysis, revealed within the journal Communications Biology, exhibits that wild orangutan juveniles devour their mom’s milk repeatedly till they’re no less than six and a half years outdated. 

Scientists already knew that orangutan offspring breastfeed for a very long time. But earlier research have been unable to obviously quantifying milk consumption, resulting in contradictory estimates for his or her weaning age.

In the brand new examine, the staff spent nearly three years amassing and inspecting faecal samples from wild Bornean orangutans within the Danum Valley Conservation Area in Sabah, Malaysian Borneo.

They used a way generally known as faecal proteomics, which identifies particular proteins in faeces. Orangutan milk accommodates a number of proteins that different meals sources don’t, so discovering them in a juvenile’s faeces offers proof that they’re nonetheless consuming breast milk.

Further research evaluating the milk‑particular proteins with organic defence proteins recommend the extra milk a younger orangutan consumes, the stronger its organic defences.

The researchers consider that breastfeeding for such a protracted interval may clarify why orangutans have one of many lowest toddler mortality charges amongst primates. On the flipside, it additionally means they’re gradual to get better after inhabitants declines.

The examine notes that “faecal proteomics can be applied to a wide range of wild animal populations, with the potential to uncover novel aspects of behaviour and physiology.”

Top picture: View of Danum Valley Conservation Area in Sabah, Malaysian Borneo. Credit: Nora Carol Photography/Getty Images

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