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Outback Wrangler: Croc Swarm Facts

All About Crocodiles

Photo: Naish approaches a crocodile

Photo: Naish approaches a crocodile (View larger version)

Photo by: Freehand Productions

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  • Crocodiles have three eyelids. In addition to the top and bottom eyelids, there’s a mostly transparent lid that cleans the eye and protects it when underwater.

  • Crocodiles do not have any vocal chords, so noise is made by pushing air through the throat and nostrils.

  • Crocodiles can judge the distance to their target very accurately – they have binocular vision.

  • Once ready to ‘lunge’ a crocodile immediately starts to use its tail to literally push itself upwards out of the water.

  • Crocodiles rely on the process of thermoregulation to regulate their body temperature – cooling in the water and warming in the sun. Keeping its mouth open while warming stops overheating of the brain.

  • Northern Australia is home to as many as 150,000 saltwater crocodiles.

  • The largest crocodile found in Australia's Northern Territory measured over 20 feet long and was found in 1974.

  • Crocodiles can start life weighing less than 2 ounces, but at maturity can grow to over 2,000 pounds.

  • A female crocodile lays an average of 40 to 60 eggs per season.

  • It is believed that less than 1% of these eggs reach adulthood due to flooding of nests, predation and overheating.

  • At 31.6 degrees, most of the hatchlings will be males. A couple of degrees above and below this, and most of the hatchlings will be females.

  • Despite their name, saltwater crocodiles are found in both fresh and saltwater and have been seen in water as far as 300km (186 miles) inland.

  • In the 1970s, saltwater crocodiles almost became extinct in the Northern Territory. The government introduced a law which tightly controlled hunting practices, allowing the population to regenerate.

Learn more about saltwater crocodiles »

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