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.
The researchers suggest that just looking at another monkey is enough to know whether they are related.
“There is some evidence that non-human primates can recognise facial resemblances between two other individuals, just like us,” Dana Pfefferle, lead author and post-doctoral researcher at Duke University, said. “We found that the macaques could detect their own relatives without being familiar with members of that side of the family.” /Click to read detailed article/