Drusillas has officially opened its new £500,000 monkey habitat.
The new area, which is the largest investment the zoo has made on an animal habitat, is designed for the colobus monkeys who have settled in well.
The zoo, which is near Alfriston, said the habitat has been custom designed and built specifically for these "energetic" monkey residents.
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Inside there are custom-built enrichment facilities including jungle-style huts and branch-climbing structures for the monkeys to play on.
There is a hand-carved rockwork terrace with space for the monkeys to climb, rest and hide and a heated tree where they can keep warm and comfortable in colder weather.
Treetop viewing platforms have been built so visitors can observe the monkeys and CCTV monitors have been put in place so zoo keepers can keep an eye on their behaviours such as feeding and breeding.
This will be used to help research and conservation efforts in co-operation with other zoos and associations worldwide.
Drusillas said the jungle huts inside the habitat have been installed to promote eco-tourism after the zoo's recent partnership with Colobus Conservation.
The charity was established in 1997 in response to the high number of deaths of colobus monkeys on the Diani Beach road in the Diani region in Kenya.
Over the last 25 years, Colobus Conservation has worked to promote the conservation, preservation and protection of Colobus monkeys and their coastal forest habitat.
They provide eco-tours to visitors to support the Angolan Colobus monkeys in the Diani region.
A spokesman for Drusillas said: "Keepers were delighted with how well the monkey group settled and made themselves at home and half-term visitors were soon able to get their first look at this truly exceptional animal habitat.
"Our hope is that alongside creating a wonderful new environment for the colobus monkeys to live in, we can also raise funds and increase awareness about the essential work charities do to help conserve wildlife.
"We also hope to provide human resources out in Kenya, so the zoo’s keepers get the chance to see Colobus Conservation's amazing work in person."
Work on the habitat started in September 2023.
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