Additionally, if you see a crocodile with a thick snout, it's probably a freshwater species, whereas saltwater species normally have broad snouts. Found only in Cuba, this medium-sized crocodile lives in swamps, and hunts fish and small mammals. Twitter’s Reaction to the Reptile Due to their smaller size, freshwater crocodiles will also have smaller teeth than saltwater crocodiles. The Florida population of the American crocodile is a conservation success story. A local freshwater swimming hole. The sightings have been rare, but crocodile spotting can still occur, as Fraser Island is technically a great habitat zone for these creatures. If a saltie came near to a freshwater nest, would they compete for dominance or would the freshwater act aggressively to the saltie? These long ridges, or keels, help the crocodile swim more quickly through the water. The Australian government will usually let travelers know of areas that have a high saltwater crocodile population so it is clear which areas to avoid. [16][17] Other attacks have occurred in self-defense when the crocodile was touched or approached too closely. To tell a freshwater crocodile from a saltwater crocodile, start by looking at their size, since freshwater crocodiles grow to a maximum of 2 meters in length, while saltwater crocodiles grow to 6 or 7 meters long. [19] There has, however, been a freshwater crocodile attack at Lake Argyle. The freshwater crocodile isn’t considered deadly, and some people even swim in areas inhabited by the species. Saltwater crocodiles, or “salties,” will often eat small reptiles, fish, turtles, and wading birds. Adult crocodiles eat fish, birds, bats, reptiles and amphibians, although larger individuals may take prey as large as a wallaby. people can see crocodiles in the wild. This article has been viewed 59,550 times. Please help us continue to provide you with our trusted how-to guides and videos for free by whitelisting wikiHow on your ad blocker. By the way, not all Kimberley crocodiles are dangerous.We have two different species of crocodiles in the Kimberley, freshwater crocodiles and saltwater crocodiles.All the warnings below concern saltwater crocodiles. They can swim up to 18 mph. "This article really helped me to explain crocodiles in my biology assignment. [18] There have been few incidents where people have been bitten whilst swimming with freshwater crocodiles, and others incurred during scientific study. But swimming with crocodiles – big crocodiles – of around 5m is an experience you’re not likely to forget. A crocodilian’s eyes are on the top of its head, so the animal can spy on its prey while remaining hidden underwater. Both scenarios are possible as crocodiles will protect themselves and their nests from outsiders. Female freshwater crocodiles may be more aggressive and territorial during this time period. A crocodilian’s eyes are on the top of its head, so the animal can spy on its prey while remaining hidden underwater. A big dietary difference is the consumption of people. When Gerard Krefft named the species in 1873, he intended to commemorate the man who first reported it to him, Australian Native Police officer and amateur naturalist Robert Arthur Johnstone (1843–1905). These preys may include crustaceans, insects, spiders, fishes, frogs, turtles, snakes, birds and various mammals. They can also be found in freshwater areas as well, but saltwater conditions do not negatively affect them. International Code of Zoological Nomenclature, "Crocodylus johnsoni Krefft 1873 (crocodile)", "Crocodile turns up in river near Birdsville",, "Crocodiles falling victim to cane toads", Australian freshwater crocodile, 1 November 2013, Australian freshwater crocodile, 6 April 2006,, "A report of a probable unprovoked attack by an Australian freshwater crocodile at Lake Argyle in Western Australia", Central African slender-snouted crocodile (,, All Wikipedia articles written in Australian English, Creative Commons Attribution-ShareAlike License, Range of the freshwater crocodile in black, This page was last edited on 28 November 2020, at 04:55. Freshwater crocodiles are found in the states of Western Australia, Queensland, and the Northern Territory. They have a streamlined body that enables them to swim faster. By using our site, you agree to our. The "Freshy" lives in freshwater creeks and gorges, while the saltwater crocodile is typically found in saltwater such as the ocean and river mouths, even though it can also live in freshwater. But you should still exercise caution around freshies. Crocodylus Acutus are large animals. The saltwater crocodile (Crocodylus porosus) is a crocodilian native to saltwater habitats and brackish wetlands from India's east coast across Southeast Asia and the Sundaic region to northern Australia and Micronesia.It has been listed as Least Concern on the IUCN Red List since 1996. They can swim as fast as 20 mph. Freshwater Crocodiles. Freshwater crocodiles are generally found in freshwater billabongs, rivers, creeks and wetlands. Herpetological Review 41(4). Saltwater crocodiles are indeed a protected species due to activities like illegal hunting and littering. While alligators can tolerate salt water for a few hours or even days, they are primarily freshwater animals, living in swampy areas, rivers, streams, lakes, and ponds. When it comes out of the water and takes a breath, its heart rate speeds up in seconds, and the muscles receive oxygen-rich blood. Nile is home to a lot of living creatures and one of them is a freshwater predator, the Nile crocodile. Why are the fresh water crocs smaller, while the salt water cousin is bigger? Other attacks have occurred in self-defense when the crocodile was touched or approached too closely. The more food, the bigger the crocodile will grow. Reproduction. Raised eyes. Like birds and mammals, crocodiles have heart valves that direct blood flows in a single direction through the heart chambers. Thanks to all authors for creating a page that has been read 59,550 times. When Bob asked Henry why Bill was spared each time he went swimming in the hole, the reply was “Too much tucker”. The Estuarine Crocodile (Crocodylus porosus) is a fearsome predator. There is a high chance to encounter a Nile crocodile in the city Aswan, but sometimes they appear in Cairo. ", How to Tell a Freshwater Crocodile from a Saltwater Crocodile,,,,, consider supporting our work with a contribution to wikiHow. Although the freshwater crocodile does not attack humans as potential prey, it can deliver a nasty bite. [5][6] However, Krefft made an error in writing the name, and for many years the species has been known as C. johnsoni. Both species are native to Australia and are known predators, though saltwater crocodiles, called “salties” locally, are more prone to attacking humans than freshwater crocodiles, known as “freshies.”[1] We use cookies to make wikiHow great. There are guidelines you must follow if you want to keep a crocodile in the Northern Territory (NT). Research source A local ranger suggested that years of flooding may have washed the animal south, or it may have been dumped as a juvenile.[11]. The freshwater crocodile (Crocodylus johnstoni or Crocodylus johnsoni; see below), also known as the Australian freshwater crocodile, Johnstone's crocodile or colloquially as freshie, is a species of crocodile endemic to the northern regions of Australia. A crocodile can swim at speeds of up to 30kph(18mph)-and even faster if it's chasing prey or escaping danger.Crocodiles are superb swimmers.They hold their powerful tails to propel themselves through water.They use back feet as rudders to steer left and right Rounded, pebbly scales cover the flanks and outsides of the legs.[7]. When there is just one ventricle to receive and mix oxygenated and deoxygenated blood and pump it to the body, the mixture of blood the body receives has relatively less oxygen. EDIT: crocodiles do have glands on the tongue to deal with excess salt, but they don't deliberately drink seawater. You should avoid going near crocodile nests, which are usually by the banks of a river, swamp, or estuary. Rather than swimming, the reptiles ride currents to travel long distances, according to a study co-designed by the late Steve Irwin. Is the fresh water alligator more dangerous than the salt water crocodile? And any good-sized crocodilian can survive a long while without drinking freshwater by satisfying its needs via food and metabolic action. The Australian government also has an ongoing educational campaign urging people to be “crocwise,” which you can read more about here. These reptiles can grow up to 16 feet and weight 500 lbs. The freshwater crocodile can stay submerged for over an hour by slowing its heartbeat down to a … Sometimes they will also eat small animals. According to the rules of the International Code of Zoological Nomenclature, the epithet johnstoni (rather than the original johnsoni) is correct. We know ads can be annoying, but they’re what allow us to make all of wikiHow available for free. Saltwater crocodiles are also a protected species.