A far north Queensland tour guide has snapped a rare image of a crocodile chopping down another croc for lunch.
The opportunistic two-metre long salt water reptile, named Eric or Erica, was recently spotted gorging on a crocodile half its size at the mouth of the Daintree River, near Cairns.
''He was having a bit of trouble getting it down his throat,'' David White of river boat tour company Solar Whisper said.
''I'm not sure if he ate it or not, but I think he did because the next week he did a lot of sunbaking with a big belly.''
He says crocodiles will often eat their own kind, including their offspring, but it's rare to see it happen.
''They look after their young for about two months, then after that then it's 'if it moves, it's food','' Mr White told AAP.
''We don't like to give them names until they're about Eric or Erica's age, about six years old, because the little ones do tend to get eaten.''
In the 15 years Mr White has been giving tours he's only seen it happen three times.
The crocodile was given its name because it's often spotted in front of a house owned by a man called Eric, although its sex is unknown.
- (Live Matches)