Female gelada baboons select their mates based on color and heat emanating from their chest patches of exposed skin.
There's all sorts of saucy footage here provided under the rubric of "education": cicada sex, gelada baboon boinking, red-sided garter snake orgies and the riflebird mating ritual, which is something virtually out of Stanley Kubrick's "Eyes Wide Shut.
Gelada baboons are native to Ethiopia and zoo staff say they have been listed by wildlife experts as a threatened species.
We have the only colony of Gelada baboons in England -we have nine.
DZG's five male Gelada baboons
have settled well into their new hillside home, right
Four kilometres up in the Ethiopian mountains, 800-strong bands of gelada baboons
roam the land.
The zoo's rare Gelada baboons
are also proving to be hugely popular, too.
More than 3000 metres up in the Simien mountains of Ethiopia, she encounters gelada baboons
Now Jade works with endangered chimpanzees, spider monkeys, Gelada baboons
, squirrel monkeys and Saki monkeys.
Species featured across the months include Bornean orang utans, Rothschild giraffes, Gelada baboons
, Stanley cranes - the national bird of South Africa - and a rhinoceros iguana, alongside Brazilian tapirs, Humboldt penguins and Santa's favourite reindeer.
Senior Curator Derek Grove, who headed the project, said: "We required a larger area for the Gelada baboons
when we had the opportunity to set up a new breeding group.
Assistant curator Richard Brown said: "The grapes went down very well with the Gelada baboons
and tapirs Chico and Ronnie adored the pears and apples It was very good of Pat, Gordon and Tricia to think of us and the fruits certainly boosted the animals' five-a-day intake.