Conservationists have discovered such rows are common among herds of elephants thundering across Africa’s vast plains.



It is one of several striking features of elephants' intriguing social system which suggests their behaviour is remarkably similar to that of humans.



In the world’s longest continuous study of elephants, researchers who have spent nearly 40 years observing their behaviour at the Amboseli National Park in Kenya said that the animals use complex communications in what appeared to be discussions over which route to take.



They also used body language and sounds in other distinctly human ways, rubbing shoulders or entwining trunks as a greeting and folding their trunk under their tusks as an invitation to play, the Daily Mail reports.



A calf may reassure itself by sucking its trunk, just like a human baby sucks its thumb. And female elephants sometimes appear to flirt by glancing over their shoulders at suitors with their eyes opened wide.



Negotiations over directions often begin with a common signal known as the "let’s go" rumble.



The elephants then engage in lengthy exchanges until a consensus is reached and the herd moves in the chosen direction.



Phyllis Lee, of Stirling University, Scotland, co-editor of "The Amboseli Elephants", a new book revealing the research, said elephants could take up to an hour discussing which way to go. "It’s wonderful to watch and a real process of negotiation," she said.



The study provided evidence for elephants’ capacity for empathy. They have long been known to display human traits such as grief, but the research showed they may also wince at each other’s pain.



In one example, when a young elephant approached an electric fence, an older female "looked alarmed, waiting for it to get zapped", said Cynthia Moss, who founded the Amboseli Elephant Research Project in 1972.



"Her posture and blinking eyes showed she was wincing," said Moss.

Other elephants have been seen pulling out tranquilliser darts from fellow herd members. Two were once seen propping up another between them after it was tranquillised.

