Stomach-churning footage shows the moment a massive saltwater crocodile devours a snake while lounging about in a river.

Lizzie, a 2.7m crocodile, slowly chomps away at the file snake then finishes off its meal with a drink from the Daintree River in Far North Queensland.

Tour guide David White shared the remarkable footage to the Facebook Solar Whisper Daintree River Crocodile and Wildlife Cruises claiming the crocodile took more than two hours to finish eating the snake.

A saltwater crocodile is seen spending two hours eating a snake before it dips its head into the river to wash it down with water

‘File snakes, not other snakes, seem to take a long time to eat? I don’t know why, they are not that big but take a while to swallow this was over two hours,’ he wrote alongside the video.

‘And it’s the only meal I have ever seen that requires washing down with a drink.’

He said it was a rare sight to see the reptile take a sip from the river as they only drink while they are in the water.

The video shows Lizzie slide onto the river bank while continuing to chomp on snake.

‘She’s still munching,’ a woman is heard saying in the background as Lizzie continues to leisurely chew away.

‘I think she’s swallowed it’ White said off camera.

Finally, moments after gulping down the snake, Lizzie dips her snout back into the river to wash it down.

‘Lizzie’ the crocodile leisurely glides onto the river bank to continue chomping away at her lunch

‘Go on have a little drink,’ White said.

‘Saltwater crocodiles have glands on their tongues and they can filter out the salt.’

The Solar Whisper Daintree River Crocodile & Wildlife Cruises Facebook page has amassed a large following after Mr White started a soap opera-style series dubbed Days of the Daintree.

Mr White named each crocodile – a 4.7m crocodile he calls Scarface, Big Nick, Lizzie, Nate, Margaret, Dusty and 3m-long  Scuter who often make appearances on the page.

Tour Guide David White regularly posts photos and video of the saltwater crocodiles on his Facebook page ‘Solar Whisper Daintree River Crocodile & Wildlife Cruises’