Read More: BBC News
An uncommon sighting of a mature white crocodile has excited tourism operators in Australia's Northern Territory. The reptile, nicknamed Pearl, was spotted on the Adelaide River near Darwin on Sunday. One witness, a local conservation enthusiast, estimated the crocodile was about 3m (10ft) long. The reptile's pale appearance is caused by hypomelanism - having a low amount of the pigment melanin, according to a zoological expert. Locals believe the animal may be related to a well-known hypomelanistic crocodile that was put down after killing a fisherman in 2014. "Everyone is so ecstatic," said the president of an unofficial local conservation group, who gave her name only as Broady. "I spent most of the day in tears watching her." Why is the crocodile white?