This article was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness. Found only in Cuba, this medium-sized crocodile lives in swamps, and hunts fish and small mammals. Crocodiles can be very dangerous. Both scenarios are possible as crocodiles will protect themselves and their nests from outsiders. Last Updated: July 25, 2019 But you should still exercise caution around freshies. If you are going for a dip double check if the location is free of any crocs. Even smaller crocodilian species can inflict a painful bite that will require antibiotics.  Males commonly weigh around 70 kg (150 lb), with large specimens up to 100 kg (220 lb) or more, against the female weight of 40 kg (88 lb). The saltwater or estuarine crocodile (Crocodylus porosus) is a ferocious giant that can grow at least 23 feet long (7 meters) and weigh more than 2,200 pounds (1000 kilograms). Saltwater crocodiles are also a protected species. But swimming with crocodiles – big crocodiles – of around 5m is an experience you’re not likely to forget. You should avoid going near crocodile nests, which are usually by the banks of a river, swamp, or estuary. The Two Species of Australian Crocodiles The Freshwater crocodile (Crocodylus johnstoni) is easy to recognise by its slender snout. Until recently, the freshwater crocodile was common in northern Australia, especially where saltwater crocodiles are absent (such as more arid inland areas and higher elevations). Found only in Cuba, this medium-sized crocodile lives in swamps, and hunts fish and small mammals. Freshwater crocodiles inhabit Tunnel Creek. The salt water crocodile, assuming you mean the one in Australia, is actually one of the few animals that does prey on humans. This species can live in areas where saltwater crocodiles can not, and are known to inhabit areas above the escarpment in Kakadu National Park and in very arid and rocky conditions (such as Katherine Gorge, where they are common and are relatively safe from saltwater crocodiles during the dry season). "This article really helped me to explain crocodiles in my biology assignment. It is an ancient animal, it was around back during the time of the dinosaurs. The Australian government also has an ongoing educational campaign urging people to be “crocwise,” which you can read more about here. Freshwater crocodiles are found in the states of Western Australia, Queensland, and the Northern Territory. Raised eyes. Wherever you travel in Australia, (whether you’re in a crocodile territory or not) it’s always smart to exercise caution when entering any body of water, salt or freshwater. These reptiles can grow up to 16 feet and weight 500 lbs. Adults may also assist young in breaking through the egg shell by chewing or manipulating the eggs in its mouth.. Two species of crocodile occur in Western Australia: the estuarine (or saltwater) crocodile and the freshwater crocodile.  In areas such as Lake Argyle and Katherine Gorge there exist a handful of confirmed 4 metres (13 ft) individuals. As a matter of fact it used to be endangered. Although the freshwater crocodile does not attack humans as potential prey, it can deliver a nasty bite. You may see saltwater crocodiles on beaches as well as by saltwater rivers and creeks. The more food, the bigger the crocodile will grow. The crocodiles have teeth that have adapted for capturing and holding prey, and food is swallowed without chewing. There have been no known human fatalities caused by this species. The freshwater crocodile can stay submerged for over an hour by slowing its heartbeat down to a … Twitter’s Reaction to the Reptile X There are two species of crocodiles that may be kept as pets - saltwater crocodiles and freshwater crocodiles. They most commonly occur in brackish and saltwater habitats, such as ponds, coves and tidal creeks lined with mangroves. There are 12 references cited in this article, which can be found at the bottom of the page. , The freshwater crocodile is a relatively small crocodilian. Other attacks have occurred in self-defense when the crocodile was touched or approached too closely. I would say no. Some individuals possess distinct bands or speckling on the snout. These long ridges, or keels, help the crocodile swim more quickly through the water. Saltwater crocodiles often defy their name and travel inland to fresh water habitats. Freshwater crocodiles court each other during the early part of the dry season (around May). (2010). This species is shy and has a more slender snout and have slightly smaller teeth than the dangerous saltwater crocodile. Unlike their much larger Australian relative, the saltwater crocodile, freshwater crocodiles are not known as man-eaters, although they will bite in self-defence and brief non-fatal attacks, apparently the result of mistaken identity, have occurred. The Crocodylus siamensis is a medium size crocodile of just over three metres long, weighing up to 70kg, and inhabiting slow moving rivers, lakes, and freshwater … They can swim up to 18 mph.  There have been few incidents where people have been bitten whilst swimming with freshwater crocodiles, and others incurred during scientific study. The stomach has two compartments: a muscular gizzard that grinds food, and a digestive chamber where enzymes act on the food. Small prey is usually obtained by a 'sit-and-wait' method, whereby the crocodile lies motionless in shallow water and waits for fish and insects to come within close range, before they are snapped up in a sideways action. International Code of Zoological Nomenclature, "Crocodylus johnsoni Krefft 1873 (crocodile)", "Crocodile turns up in river near Birdsville", https://www.telegraph.co.uk/travel/destinations/australiaandpacific/australia/10672439/Snake-eats-crocodile-in-battle-at-Australian-lake.html, "Crocodiles falling victim to cane toads", Australian freshwater crocodile, 1 November 2013, Australian freshwater crocodile, 6 April 2006, http://aebrain.blogspot.com/2003/09/how-embarressing.html, "A report of a probable unprovoked attack by an Australian freshwater crocodile at Lake Argyle in Western Australia", Central African slender-snouted crocodile (, https://en.wikipedia.org/w/index.php?title=Freshwater_crocodile&oldid=991084806, 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. Crocodiles have a more complex vertebrate circulatory system, with a four-chambered heart including two ventricles. The estuarine crocodile is the largest living reptile and is considered to be a dangerous predator. wikiHow's Content Management Team carefully monitors the work from our editorial staff to ensure that each article is backed by trusted research and meets our high quality standards. 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. Freshwater crocodiles, or “freshies," will eat smaller animals that are found near rivers, such as insects, fish, frogs, turtles, waterbirds, and snakes. The freshwater crocodile is also referred to as the Johnstone’s Crocodile, which lives in rivers and lakes in northern Australia. The digestive tract is short, as their food is a relatively simple thing to swallow and digest. If a saltie came near to a freshwater nest, would they compete for dominance or would the freshwater act aggressively to the saltie? All tip submissions are carefully reviewed before being published, This article was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness. Crocodiles are as old as dinosaurs. Moreover, it has been shown that crocodiles can survive without food or water for an extended period of time. The Estuarine Crocodile (Crocodylus porosus) is a fearsome predator. However, both versions still exist. Does it have something to do with more room in the water to grow? A big dietary difference is the consumption of people. A local freshwater swimming hole. Why are the fresh water crocs smaller, while the salt water cousin is bigger? When underwater, the crocodile's heart rate slows down to one or two beats a minute, and muscles receive less blood flow. They compete poorly with saltwater crocodiles; however, this species is saltwater tolerant. ", How to Tell a Freshwater Crocodile from a Saltwater Crocodile, http://www.divethereef.com/Guides/AboutCrocs.asp, http://www.outback-australia-travel-secrets.com/australian_crocodiles.html#australian-freshwater-crocodile, http://www.environment.gov.au/cgi-bin/sprat/public/publicspecies.pl?taxon_id=1774, https://nt.gov.au/environment/animals/wildlife-permits/permits-take-interfere-with-wildlife, consider supporting our work with a contribution to wikiHow. 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 However, larger prey like wallabies and water birds may be stalked and ambushed in a manner similar to that of the saltwater crocodile. Brief and rapidly abandoned attacks have occurred, and were likely the result of mistaken identity (mistaking a part of the human as a typical prey item). You should avoid swimming in the same waters as saltwater crocodiles due to their territorial nature and keep your distance if you spot a saltwater crocodile on land.