An endangered piglet the size of a "grapefruit with legs" when she was born has made her debut at Chester Zoo, conservationists have said. Rana - a babirusa known as a "pig-deer" - has been described as a "lifeline for the species" which is in rapid decline in the wild. Babirusas in the wild are found on just four Indonesian islands and the zoo said they were being wiped out due to African swine fever reaching the islands five years ago. The attraction's Hannah Owens said Rana was "tiny" when she was born but has "grown a lot and is doing really well". Rana is the fifth piglet born to mother Matano, who was herself born at Chester Zoo 11 years ago and now has descendants living in zoos across Europe.