A critically endangered addax calf has been born at Marwell Zoo.

The calf, born on Friday, September 13, is the fourth offspring of mother Amelie and father Tamerisk.

The zoo said the newborn is doing well and is gaining confidence.

Zoe Newnham, senior animal keeper, said: "The new addax calf was born to mum Amelie and dad Tamerisk and is their fourth calf together.

"He is doing really well and is very confident and inquisitive, and a great addition to our herd here at Marwell."

READ MORE: Critically endangered mountain bongo calf born at Marwell Zoo

The addax calf is said to be gaining in confidence daily (Image: Charlotte Bennett) The addax species is listed as critically endangered on the International Union for the Conservation of Nature (IUCN) Red List, with only 30 to 90 mature individuals left in the wild.

Zoe added: "Marwell works with addax both in the wild, and here at the zoo by being part of the European Endangered Species Programme breeding programme, which our calf is now the newest member of."

Once widespread across the Sahelo-Saharan region of Africa, they are now only known to be present in a small area of Niger.

The IUCN Red List notes that "the species is at serious risk of becoming extinct in the wild".

Marwell is one of just three zoos in the UK that houses addax and manages protected areas in Tunisia where addax have been released.

The calf is the latest arrival in recent weeks following the birth of a male Rothschild’s giraffe, female Grevy’s zebra, male mountain bongo and female sitatunga.