Joy as one of the world’s most endangered primates born at Chester Zoo

Zookeepers are "overjoyed" after one of the world's most endangered primates was born at Chester Zoo.

The rare baby cotton-top tamarin monkey measuring just 10cm from head to tail and weighing a 40g, arrived to first time parents Treat, three, and Leo five.

At the zoo, primate experts say new parents Treat and Leo have settled straight into family life.

Siobhan Ward, Primate Keeper at Chester Zoo, said: "The little one weighs just 40g and is around 10cm tall from head to tail, so it’s a little too tiny and a bit early on to determine its gender at the moment.

"The baby will be carried around by both parents for around the next six months – but it’s actually dad who’s been doing most of the carrying so far, passing it to mum for feeds while he stays protectively close by.

"Both Treat and Leo have taken to parenthood brilliantly."

Cotton-top tamarins are listed as critically endangered on the International Union of Conservation and Nature’s (IUCN) Red List.

Conservationists at Chester Zoo are part of a coordinated international effort, involving the world’s leading zoos, which is aiming to save the species from extinction.

Nick Davis, Deputy Curator of Mammals at the zoo, said: "The cotton-top tamarin is an exquisite animal but sadly it’s one of the most endangered primate species on the planet.

"It’s a highly threatened species because its wild habitat has been destroyed by commercial logging for the agriculture, paper and timber industries, and these miniature monkeys are also regularly found in the illegal wildlife trade.

"It wasn’t that long ago that these miniature primates were seen as quite a common species, so their dramatic demise over the last few years shows just how a species thought to be safe can change so rapidly."

It is estimated that just 2,000 breeding animals remain in the wild - tamarins have already undergone a large reduction in their numbers and are predicted to decline by 80% in the next 20 years, making them one of rarest of all primate species.

The mini monkeys are native to a small area in northern Colombia but, sadly, only 5% of their original habitat now remains intact due to mass deforestation, while the illegal wildlife trade is another significant threat to their survival.

Cotton-top tamarins live in extended family groups of around eight individuals in which a dominant female suppresses the fertility of the other females in the group. When a group grows too large, a pair will then head off to start their own group.

Cotton-top tamarins are pregnant for around five months and use more than 38 different calls to communicate to one another, defend their territory, call their young and warn the group of predators.