A flight in Australia was delayed for two hours after a stowaway snake was found in the plane's cargo hold.
The reptile was found as passengers were boarding Virgin Australia Flight VA337 at Melbourne Airport bound for Brisbane.
Snake catcher Mark Pelley said he thought it could be venomous when he approached it in the darkened hold.
But it turned out to be a harmless 60cm green tree snake.
"It wasn't until after I caught the snake that I realised that it wasn't venomous. Until that point, it looked very dangerous to me," Mr Pelley said.
He said when he entered the cargo hold, the snake was half hidden behind a panel and he feared it could flee deeper into the plane.
"I had one chance to grab it, and if it escaped past me it would have gone into the panels, and then that would have been extremely hard to catch," he told Sky News.
"Snakes are very fast-moving, thin and agile," he added.
Mr Pelley said he told an aircraft engineer and airline staff they would have to evacuate the aircraft if the snake disappeared inside the plane.
"I said to them if I don't get this in one shot, it's going to sneak through the panels and you're going to have to evacuate the plane because at that stage I did not know what kind of snake it was," he explained in a separate interview.
"But thankfully, I got it on the first try and captured it," he added. "If I didn't get it that first time, the engineers and I would be pulling apart a [Boeing] 737 looking for a snake still right now."
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Mr Pelley said because the snake is native to the Brisbane region he suspects it came on board inside a passenger's luggage and escaped.
"It's actually very uncommon for snakes to be on the plane," he told Sky News.
For quarantine reasons the snake cannot be returned to the wild.
The animal, a protected species, has been given to a Melbourne vet to find a home with a licensed snake keeper.
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