A drought in the Australian outback means there's not enough food and water for the wild animals.
So camels have been licking the dew off the tracks.
When they see a train coming they run in a straight line, often down the track, so they get knocked down and killed.
As many as eight of the animals have been killed at once by a single train, and numbers of camels in outback are falling.
People are also worried that hitting a camel could force the train off the tracks.