Ian Waldie via Getty Images A Chimpanzee jumps at a glass screen as primatologist Dr. Jane Goodall holds a press conference at Taronga Zoo July 14, 2006 in Sydney, Australia.

Donald Trump’s antics remind famed anthropologist Jane Goodall of the primates she spent decades studying in the wild.

“In many ways the performances of Donald Trump remind me of male chimpanzees and their dominance rituals,” Goodall told The Atlantic. “In order to impress rivals, males seeking to rise in the dominance hierarchy perform spectacular displays: stamping, slapping the ground, dragging branches, throwing rocks.”

Goodall added, “the more vigorous and imaginative the display, the faster the individual is likely to rise in the hierarchy, and the longer he is likely to maintain that position.”

To date, we’ve not seen Trump drag branches or throw rocks, although anything is possible. Instead of physical displays, the Republican presidential nominee has stuck to verbal ones ― bragging about his penis, launching personal attacks and resorting to racist and sexist insults.

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Trump is set to debate his Democratic opponent, Hillary Clinton, on Sept. 26. When it happens, Goodall told The Atlantic she’ll be thinking of “Mike,” a chimpanzee she studied that displayed dominance by kicking kerosene cans, creating a racket that sent would-be challengers fleeing.

Unsurprisingly, Trump has already boasted that he will come out on top, telling The New York Times “I know how to handle Hillary.”

Whether his strategy includes childish tidbits has yet to be seen. Tony Schwartz, co-author of Trump’s book The Art of the Deal, however, bets it will.

“Trump has severe attention problems and simply cannot take in complex information — he will be unable to practice for these debates,” Schwartz told the Times. “Trump will bring nothing but his bluster to the debates. He’ll use sixth-grade language, he will repeat himself many times, he won’t complete sentences, and he won’t say anything of substance.”

Editor’s note: Donald Trump regularly incites political violence and is a serial liar, rampant xenophobe, racist, misogynist and birther who has repeatedly pledged to ban all Muslims — 1.6 billion members of an entire religion — from entering the U.S.