One crocodile was spotted in Ingham, towards Australia’s northeastern tip, by resident Rhonda Brown, who posted an image of the reptile on Facebook.
“Wasn’t getting out of car to see if it was alive or dead,” she wrote.
“Its eyes were open so that’s why I thought it was still alive..”
Bonnie Leighty posted on the site: “Already declared a disaster zone due to flooding, now faces a crocodile invasion… No swimming folks!!”
Stephen Solomons added: “And bullsharks. There have been sightings of bullsharks as well. I’d hate to be stuck in that flood.”
Queensland’s environment department urged people in the “disaster” zone to report all crocodile sightings.
“Crocodiles and snakes may turn up in unexpected places as a result of the heavy rainfall and flooding in parts of North Queensland,” it said.
Crocodile country normally runs from north of the Boyne River and extends west to the border between Queensland and the Northern Territory along the coast, according to its ‘Be Crocwise’ web page.
“Crocodiles can move further upstream during very high tides and periods of flooding and may move into new areas where crocodiles had not been seen before,” it warns.
“Just because you can’t see a crocodile doesn’t mean there is not one close by…
“Crocodiles can be very patient, and can stay underwater and unseen for up to four hours without even a breath.”
Toby Millyard, crocodile researcher at Australia Zoo in Queensland, said the reptiles are known to use flood waters in the region to travel to different areas and search for food.
“Some crocodiles love it when it rains and they use the water’s currents to travel; they’re very smart animals.
“But they’re very easy to stay away from. As long as you’re not in the water or standing by the edge, then you should be fine.”
Queensland state premier Annastacia Palaszczuk said it would take several weeks to determine the full extent of the flood damage.