A baby monkey born at a zoo in Sussex could give a boost to a critically endangered species.

The Sulawesi black crested macaque, which is believed to be male, was delivered at Drusillas Park near Alfriston last month, the Daily Mirror reports.

Native to a single island in Indonesia, the species is listed by the International Union for Conservation of Nature as critically endangered.

Over the last 40 years, habitat loss and the work of hunters have seen numbers decline by around 80 per cent, to the point where there is a risk they will become extinct in the wild.

Zoo manager Sue Woodgate told the publication it is "wonderful to see the new addition to our macaque family".

The wildlife sanctuary added he is likely to remain extremely dependent on his mum for the next few months and is currently doted on by his cousin Kamala, born last year.

"We are expecting a lot of monkeying around from these two over the coming months," Ms Woodgate added.

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