Habitat and geography fail

Just read on BBC News that two liger cubs are nursed by a dog in China's Xixiakou Zoo. Awwww. However, this sentence really makes me stare at the screen and question the writer's sanity:

Ligers are extremely rare and are thought to only be born in captivity.

Well, duhhh?!

A liger, as the text points out before this line, is a cross between a male lion and a female tiger. There's a bloody good reason why ligers can only be born (and indeed bred) in captivity, thereby making them extremely rare, is because lions live in Africa and tigers live in Asia. (There were Asian lions way back, apparently, but not exactly nowadays.) It's not as if the two species hang out in the wild on a regular basis and go to see each others' etchings ...