Two of the world's rarest lions have arrived at Chester Zoo.

The pair have been carefully matched following detailed genetic analysis as part of an international conservation breeding programme.

The zoo has welcomed a male named Nilay, who has travelled from Köln Zoo in Germany, alongside Shanti, a female who has arrived from London Zoo.

Conservationists say the duo has 'formed an instant connection' and are hopeful that they'll go on to have cubs in the future.

Chester Zoo has been identified as a key player in helping to safeguard the long-term survival of Asiatic lions, which now number fewer than 900 individuals in the wild.

Now, carnivore experts have released the first images of the iconic cats exploring their expansive new home, which has been specially designed to recreate the dry forests and scrublands of India's Gir Forest - the only place on Earth where Asiatic lions still exist in the wild.

Dave Hall, Team Manager of Carnivores, at Chester Zoo, said: "Both lions are around two years old, which means they're full of curiosity and youthful energy.

"They're also that the age where they'd naturally start to leave their mother and become independent, which is why the time was right for them to join us here after being carefully matched together as part of the international conservation breeding programme.

"We're hopeful that as their bond grows stronger, we may one day have a pride again here at Chester, which would be another truly special milestone for the safety-net population of Asiatic lions."

Asiatic lions are distant relatives of African lions.

They exhibit subtle biological differences, with Asiatic lions generally having shorter manes, shorter foreheads and a distinctive skin fold running the length of their belly. Their short, sharp roar can be as loud as 114 decibels and can be heard up to 8km away. 

Lions once roamed across large parts of Africa, Greece, Turkey and Asia but now live in isolated populations, including the Asiatic lion which is only found in the Gir Forest in India, leaving them incredibly vulnerable to the threat of disease, habitat loss and natural disasters.

Asiatic lions are classified as endangered by the International Union for the Conservation of Nature (IUCN) - highlighting the need for urgent conservation intervention.  

Experts warn that, without effective conservation, the big cats could follow in the footsteps of the Barbary and Persian lions that once roamed North Africa and the Middle East and vanish from the wild.

Mark Brayshaw, Head of Mammals at Chester Zoo, added: "By creating a safety-net population in zoos like ours, we can ensure that these incredible animals don't disappear altogether like others in the past.

"At the same time, we're part of conservation efforts in India and across Asia, where our teams are to working to protect highly threatened species and the landscapes they depend upon, so they can go on to thrive long into the future."