Types of Crocodiles


    Types of Crocodiles

    Crocodiles belong to the reptile family, which also includes snakes, turtles, and lizards. They live in swamps, rivers, marshes, and other warm water areas. Crocodiles have been here on earth for about 240 million years, appeared at least 25 million years before the first dinosaurs and 100 million years before the birds and mammals came into existence.

    Crocodilia is one of the reptile orders dedicated to large, lizard-shaped, and predatory reptiles, including crocodiles, gharials, alligators, and caimans.

    Crocodile Word Origin

    The word crocodile originates from the Ancient Greek word ‘krokódilos‘, which means ‘lizard‘. It was used in the phrase ‘ho krokódilos tou potamoú‘, which means “the lizard of the Nile river“.

    Differences Between Crocodiles, Alligators & Gharials

    Although crocodiles, alligators and gharials look alike, there are technical differences between them. Explore them below:
    Differences Between Crocodiles and Alligators and Gharials

    Differences Between Crocodiles and Alligators and Gharials

    Crocodiles, alligators, and gharials are giant aquatic reptiles that exist in regions throughout the world. Explore critical differences between them.

    Types of Crocodiles

    Currently there are 23 different types of crocodile species have been identified and classified in the reptile order – Crocodilia.

    • American Alligator

      American alligator (Alligator mississippiensis)

      Kingdom Order Family Genus Species
      Animalia Crocodilia Alligatoridae Alligator Alligator mississippiensis

      The American alligator is a giant crocodilian reptile endemic to the Southeastern United States. Living in the bodies of freshwater, the American alligator is slightly larger than the Chinese alligator. The other names to American alligators are gators and common alligators. These apex predators feed on fish, amphibians, other reptiles, birds, and mammals.

      The taxonomy classification for the American alligator was done by François Marie Daudin (French Zoologist) in 1802.

    • American Crocodile

      American Crocodile (Crocodylus acutus)

      Kingdom Order Family Genus Species
      Animalia Crocodilia Crocodylidae Crocodylus Crocodylus acutus

      The American crocodile is one of the most widespread crocodile species in the Americas (North and South). These crocodiles have a tolerance to saltwater due to salt glands under their tongue. As a result, they thrive in saltwater swamps, lagoons, islets, lays, and small islands. Weighing up to 2000 lbs, American crocodiles are dangerous to humans.

      In 1807, Georges Cuvier, a French naturalist has added the American crocodile to the binomial classification.

    • Australian Freshwater Crocodile

      Australian Freshwater Crocodile (Crocodylus johnsoni)

      Kingdom Order Family Genus Species
      Animalia Crocodilia Crocodylidae Crocodylus Crocodylus johnsoni

      The Australian Freshwater Crocodile is also known as Johnstone’s crocodile or freshie. These freshies are endemic to the northern region of the Australian continent. Diet-wise these freshwater crocodiles do not prefer humans, so not-man-eaters; however, they can deliver a nasty bite in self-defense if within their vicinity. Being saltwater tolerant, they dine on fish, birds, bats, reptiles, and mammals.

      Gerard Krefft, an Australian zoologist, named this species in 1873.

    • Black Caiman

      Black Caiman (Melanosuchus niger)

      Kingdom Order Family Genus Species
      Animalia Crocodilia Alligatoridae Melanosuchus Melanosuchus niger

      The black caiman is another enormous crocodile, along with the American crocodile growing up to 20 feet in length. This carnivorous reptile prefers to habitat on the slow-moving rivers, lakes, Amazon basin, and other freshwater habitats of South America. Juveniles start with white and yellow pale banding on the flanks, and it turns into almost black as an adult, hence the name. Black caimans have a generalist diet as apex predators and can take virtually any terrestrial and riparian animals in their territory. Sometimes, they cannibalize juveniles of their own kind.

      Johann Baptist von Spix was a German biologist who classified the black caiman as one of the crocodile species in 1825.

    • Broad-snouted Caiman

      Broad-snouted Caiman (Caiman latirostris)

      Kingdom Order Family Genus Species
      Animalia Crocodilia Alligatoridae Caiman Caiman latirostris

      The Broad-snouted caiman is mainly seen in eastern and central South American countries, including southeastern Brazil, northern Argentina, Uruguay, Paraguay, and Bolivia. These freshwater crocodiles are usually in still or very slow-moving waters. It feeds primarily on small invertebrates, turtles, and snails.

      François Marie Daudin, a French naturalist, added the Broad-snouted caiman to the binomial classification in 1802 as a crocodile species.

    • Chinese Alligator

      Chinese Alligator (Alligator sinensis)

      Kingdom Order Family Genus Species
      Animalia Crocodilia Alligatoridae Alligator Alligator sinensis

      The Chinese alligators are also known as the Yangtze alligator or the muddy dragon, and they are endemic to China. Inhabiting freshwater, the Chinese alligator’s range is restricted to 6 regions in the province of Anhui and possibly the provinces of Jiangsu and Zhejiang. These carnivorous opportunistic feeders prey on a variety of different animals depending on what is available.

      In 1879, Albert-Auguste Fauvel, a French naturalist, has classified the Chinese alligator as a valid species into the Crocodilia reptile order.

    • Cuban Crocodile

      Cuban Crocodile (Crocodylus rhombifer)

      Kingdom Order Family Genus Species
      Animalia Crocodilia Crocodylidae Crocodylus Crocodylus rhombifer

      The Cuban crocodile is one of the small-medium species and endemic to Cuba. Highly aggressive despite its modest stature, it is dangerous to humans on their territories. They prefer freshwater swamps, rivers, and marshes. Feeds on fish, turtles, and mammals tend to perform cooperative hunting as a pack to take down the prey. These crocs are super intelligent animals with developed cerebral cortex where in captive environments, they can be taught tricks and suggesting intelligence. The Cuban crocodiles are listed as Critically Endangered (CE) by IUCN due to extreme hunting by humans.

      The world-famous French naturalist, Georges Cuvier, took the honors to name this crocodile species into taxonomy in 1807.

    • Cuvier's Dwarf Caiman

      Cuvier's Dwarf Caiman (Paleosuchus palpebrosus)

      Kingdom Order Family Genus Species
      Animalia Crocodilia Alligatoridae Paleosuchus Paleosuchus palpebrosus

      Cuvier’s dwarf caiman is one of the smallest crocodiles distributed in northern and central South America, including Bolivia, Brazil, Columbia, Ecuador, and Venezuela. It habitats in riverine forests, flooded forests near lakes, and fast-flowing rivers and streams. The musky caiman, the dwarf caiman, and the smooth-fronted caiman are the common names of this freshwater croc. Due to its small size (up to 4 feet long), this crocodile is kept in captivity as a pet. They feed on invertebrates, fish, amphibians, and mollusks.

      Georges Cuvier, a French naturalist, named this crocodile species after his name in 1807.

    • Dwarf Crocodile

      Dwarf Crocodile (Osteolaemus tetraspis)

      Kingdom Order Family Genus Species
      Animalia Crocodilia Crocodylidae Osteolaemus Osteolaemus tetraspis

      The dwarf crocodile is an African crocodile, and it is the smallest living freshwater crocodile species. The African dwarf crocodile and bony crocodile are other common names for this crocodile species. The dwarf crocodile is mainly nocturnal and timid; they hide in the pools or borrows during the daytime. Dwarf crocs tend to feed on fish, crabs, frogs, insects, lizards, water birds, bats, and more as generalist predators. Dwarf crocodiles can be spotted in tropical regions of Sub-Sharan West Africa and Central Africa countries, including Senegal and Uganda.

      An American herpetologist, Edward Drinker Cope, took the honors in naming this crocodile in 1861.

    • False Gharial

      False Gharial or Malayan Gharial (Tomistoma schlegelii)

      Kingdom Order Family Genus Species
      Animalia Crocodilia Gavialidae Tomistoma Tomistoma schlegelii

      The Malayan Gharial is also called the False Gharial and the Sunda Gharial, habitats freshwater bodies. It is endemic to the Peninsular Malaysia, Sumatra, Borneo, and Java islands. Currently, it is listed as Vulnerable by ICUN due to the drainage of its freshwater swamplands and clearance of surrounding rainforests. This crocodile has not been studied in detail until recent times. The false Gharial has a generalist diet and preys on fish, cows, small aquatic animals, proboscis monkeys, deer, water birds, and other reptiles.

      The taxonomy classification for the False Gharial was done by Salomon Müller, a German naturalist, in 1838.

    • Gharial

      Gharial (Gavialis gangeticus)

      Kingdom Order Family Genus Species
      Animalia Crocodilia Gavialidae Gavialis Gavialis gangeticus

      The Gharial is the fish-eating crocodile from the northern Indian subcontinent, including India, Nepal, Bhutan, and Myanmar. This longest freshwater crocodile is about 20 feet in length. The name Gharial comes from the Indian word Ghara, an earthenware pot to store water resembles the boss at the end of the snout. Unfortunately, the wild gharial population has faded drastically due to loss of habitats from sand mining and depletion of fish resources. As a result, the IUCN upgraded its status to Critically Endangered (CE) in 2007.

      A German naturalist, Johann Friedrich Gmelin, had classified the Gharial into taxonomy in 1789.

    • Jacare Caiman

      Jacare Caiman (Caiman yacare)

      Kingdom Order Family Genus Species
      Animalia Crocodilia Alligatoridae Caiman Caiman yacare

      The yacare caiman is found in South American countries like Brazil, Argentina, Bolivia, and Paraguay. These freshwater amphibians inhabit the rivers, swamps, and lakes. They are solitary animals but are often seen in groups because they are matrilineal dominant – this means females dominate over males. The other names are jacare caiman, Spanish yacaré, Paraguayan caiman, piranha caiman, red caiman, and southern spectacled caiman.

      The French naturalist, François Marie Daudin, added Jacare caiman as another crocodile species into the taxonomy in 1802.

    • Morelet's crocodile

      Morelet's crocodile (Crocodylus moreletii)

      Kingdom Order Family Genus Species
      Animalia Crocodilia Crocodylidae Crocodylus Crocodylus moreletii

      Morelet’s crocodile is also called the Mexican crocodile. These freshwater crocodiles are primarily found in the Atlantic regions of Mexico, Belize, and Guatemala. Highly opportunistic, these Mexican crocs eat anything that comes into their territories, including small mammals (tapirs, goats, dogs, and cats), birds, other reptiles, and crustaceans. Sometimes they are cannibalistic towards their species.

      Gabriel Bibron and André Marie Constant Duméril, two French zoologists, took honors in naming Morelet’s crocodile into taxonomy in 1851.

    • Mugger crocodile

      Mugger crocodile (Crocodylus palustris)

      Kingdom Order Family Genus Species
      Animalia Crocodilia Crocodylidae Crocodylus Crocodylus palustris

      The Mugger Crocodile got its name from Indian mythology, where crocodile-like animal called ‘Magara‘. So the names Mugger and Magar are interchangeably used to denote this Indian sub-continent freshwater medium-sized crocodile. These ‘Vulnerable IUCN status’ crocodiles prey on insects, snakes, monkeys, squirrels, rodents, fish, reptiles, birds, mammals, and dead animals in dry seasons. Currently, they are protected by laws in Iran, India, and Sri Lanka.

      A French herpetologist, René Lesson, classified the mugger crocodile into the taxonomy in 1831.

    • New Guinea crocodile

      New Guinea crocodile (Crocodylus novaeguineae)

      Kingdom Order Family Genus Species
      Animalia Crocodilia Crocodylidae Crocodylus Crocodylus novaeguineae

      The New Guinea Crocodile is one of the small crocodile species primarily found in the northern part of New Guinea island. These chomps are on the freshwater swamps and lakes. Active in the night, New Guinea crocodiles feed on fish and small animals. Although these crocodiles were over-hunted for their valuable skin in the mid 20th century, they are in the Least Concern (LC) status with the new conservation measures in place.

      Karl Patterson Schmidt, an American herpetologist, classified this crocodile species in 1928 and another in 1935 (Philippine crocodile).

    • Nile crocodile

      Nile crocodile (Crocodylus niloticus)

      Kingdom Order Family Genus Species
      Animalia Crocodilia Crocodylidae Crocodylus Crocodylus niloticus

      The Nile Crocodile is the most popular crocodile species in the world. Primarily freshwater habitats in Africa and sub-Saharan Africa prefer to live in several aquatic environments, including brackish lakes, delta rivers, swamps, and marshlands. This largest freshwater predator of Africa is considered the second-largest extant reptile after the saltwater crocodile.
      Like other crocodiles listed above, these opportunistic ambush predators are very aggressive and have a powerful bite with conical teeth. Nile crocodiles can take down almost anything within their territories, including fish species, reptiles, birds, and mammals.

      An Austrian naturalist, Josephus Nicolaus Laurenti, named this crocodile species into the Crocodilia order in 1768.

    • Orinoco Crocodile

      Orinoco Crocodile (Crocodylus intermedius)

      Kingdom Order Family Genus Species
      Animalia Crocodilia Crocodylidae Crocodylus Crocodylus intermedius

      The Orinoco crocodiles can be found only in freshwater regions, particularly in Colombia and Venezuela around the Orinoco River and its surroundings. These are critically endangered crocodiles due to extensive hunting for their skins in the last 200 years. Orinoco crocodiles are primarily piscivorous (i.e., fish-eater), but they can also prey on other reptiles, birds, mammals, or even other caimans. These dig holes on the ground to lay their eggs, similar to the Nile or other saltwater crocodiles.

      In 1819, Graves classified has added this crocodile species into the taxonomy.

    • Philippine Crocodile

      Philippine Crocodile (Crocodylus mindorensis)

      Kingdom Order Family Genus Species
      Animalia Crocodilia Crocodylidae Crocodylus Crocodylus mindorensis

      The Philippine crocodile is also called Mindoro crocodile, the Philippine freshwater crocodile, bukarot, or buwaya. Endemic to the Philippines, it is one of the two Filipino crocodiles. Critically endangered due to over-exploitation and unsustainable fishing methods, these golden-brown freshwater bukarots are conserved by the Mabuwaya foundation.

      Karl Patterson Schmidt, an American herpetologist, added the Philippine crocodile to the binomial classification as a valid crocodile species in 1935.

    • Saltwater Crocodile

      Saltwater Crocodile (Crocodylus porosus)

      Kingdom Order Family Genus Species
      Animalia Crocodilia Crocodylidae Crocodylus Crocodylus porosus

      The saltwater crocodiles are saltwater habitats widely distributed in many parts of the world, including India’s east coast, the northern part of Australia, Sundaic regions, and Micronesia. Although IUCN listed this crocodile as Least Concern (LC), it is threatened by illegal hunting for its skins. The saltwater crocodiles are the giant living reptiles globally, growing up to 21 feet and weighing around 2900 lbs. The other names of this opportunistic and hyper-carnivorous ambush predator are estuarine crocodile, Indo-Pacific crocodile, marine crocodile, sea crocodile, or saltie. They can take down even sharks once it’s on their territories and preys on pelagic species, fish species, crustaceans, reptiles, birds, mammals even humans.

      Johann Gottlob Theaenus Schneider, a German naturalist, added the Saltwater crocodile into binomial classification in 1801.

    • Schneider's Dwarf Caiman

      Schneider's Dwarf Caiman (Paleosuchus trigonatus)

      Kingdom Order Family Genus Species
      Animalia Crocodilia Alligatoridae Paleosuchus Paleosuchus trigonatus

      The Schneider’s dwarf caiman or Schneider’s smooth-fronted caiman is the crocodile species from the Amazon and Orinoco basins of South America. This freshwater croc is the second-smallest alligator (grows up to 5.2 ft) after Cuvier’s dwarf caiman. They feed on pacas, porcupines, snakes, birds, lizards, fish, and mollusks. Interestingly, the smooth-fronted caiman is not widely hunted as its skin contains many bony scutes, making it challenging to make leather goods from them. As a result, IUCN status is Least Concern (LC).

      Another discovery by Johann Gottlob Theaenus Schneider, a German naturalist, named this dwarf crocodile after his surname in 1801.

    • Siamese Crocodile

      Siamese Crocodile (Crocodylus siamensis)

      Kingdom Order Family Genus Species
      Animalia Crocodilia Crocodylidae Crocodylus Crocodylus siamensis

      The Siamese Crocodile is another medium-sized freshwater endemic to Asian countries, including Indonesia, Brunei, Malaysia, Laos, Cambodia, Myanmar, Thailand, and Vietnam. The other nicknames are Siamese freshwater crocodile, Singapore small-grain, and soft-belly. Siamese crocs prey mainly on fish, snakes, amphibians, and small mammals.

      A German naturalist, Johann Gottlob Theaenus Schneider, had added the Siamese crocodile into the taxonomy in 1801.

    • Spectacled Caiman

      Spectacled Caiman (Caiman crocodilus)

      Kingdom Order Family Genus Species
      Animalia Crocodilia Alligatoridae Caiman Caiman crocodilus

      The Spectacled Caiman got its name from a spectacle-like ridge between its eyes. The other names are the white caiman, common caiman, and speckled caiman. These freshwater brownish and greenish crocodiles’ diet varies from season to season ranging from crabs, fish, mammals, and snails.
      This Spectacled Caiman species is native to Latin America.

      In 1758, Carl Linnaeus, a famous Swedish zoologist, added the Spectacled caiman into the binomial classification as a valid crocodile species.

    • West African Slender-snouted Crocodile

      West African Slender-snouted Crocodile (Mecistops cataphractus)

      Kingdom Order Family Genus Species
      Animalia Crocodilia Crocodylidae Mecistops Mecistops cataphractus

      The West African slender-snouted crocodile is one of 5 crocodile species of Africa. The West African slender-snouted crocodile is medium-sized with a very long, slender snout used to catch fish. They prefer to habitat in dense, vegetated bodies of freshwater. Currently, IUCN has given the status of Critically Endangered due to the declining population.

      Georges Cuvier, a French naturalist, named the West African slender-snouted crocodile species into taxonomy in 1825.

    Types of Crocodiles by Waterbodies

    Chinese Alligator (Freshwater)

    Common Name Binomial Name Habitat
    American Alligator Alligator mississippiensis Freshwater
    American Crocodile Crocodylus acutus Saltwater
    Australian Freshwater crocodile Crocodylus johnsoni Freshwater
    Black Caiman Melanosuchus niger Freshwater
    Broad-snouted Caiman Caiman latirostris Freshwater
    Chinese Alligator Alligator sinensis Freshwater
    Cuban crocodile Crocodylus rhombifer Freshwater
    Cuvier’s dwarf caiman Paleosuchus palpebrosus Freshwater
    Dwarf crocodile Osteolaemus tetraspis Freshwater
    False gharial Tomistoma schlegelii Freshwater
    Gharial Gavialis gangeticus Freshwater
    Jacare Caiman Caiman yacare Freshwater
    Morelet’s crocodile Crocodylus moreletii Freshwater
    Mugger crocodile Crocodylus palustris Freshwater
    New Guinea crocodile Crocodylus novaeguineae Freshwater
    Nile crocodile Crocodylus niloticus Freshwater
    Orinoco crocodile Crocodylus intermedius Freshwater
    Philippine crocodile Crocodylus mindorensis Freshwater
    Saltwater crocodile Crocodylus porosus Saltwater
    Schneider’s dwarf caiman Paleosuchus trigonatus Freshwater
    Siamese crocodile Crocodylus siamensis Freshwater
    Spectacled Caiman Caiman crocodilus Freshwater
    West African slender-snouted crocodile Mecistops cataphractus Freshwater

    Crocodiles by Year of Taxonomy Classification

    Spectacled Caiman (1758 - Carl Linnaeus)

    From a taxonomy classification perspective, spectacled-caiman was the first crocodile species to be added to the Crocodilia order by Carl Linnaeus in 1758. The last crocodile species to be added was the Philippine Crocodile by Karl Patterson Schmidt in 1935.

    Common Name Binomial Name Year Biologist Profession
    Spectacled Caiman Caiman crocodilus 1758 Carl Linnaeus Swedish Zoologist
    Nile crocodile Crocodylus niloticus 1768 Josephus Nicolaus Laurenti Austrian Naturalist
    Gharial Gavialis gangeticus 1789 Johann Friedrich Gmelin German Naturalist
    Saltwater crocodile Crocodylus porosus 1801 Johann Gottlob Theaenus Schneider German Naturalist
    Schneider’s dwarf caiman Paleosuchus trigonatus 1801 Johann Gottlob Theaenus Schneider German Naturalist
    Siamese crocodile Crocodylus siamensis 1801 Johann Gottlob Theaenus Schneider German Naturalist
    American Alligator Alligator mississippiensis 1802 Franççois Marie Daudin French Zoologist
    Broad-snouted Caiman Caiman latirostris 1802 Franççois Marie Daudin French Zoologist
    Jacare Caiman Caiman yacare 1802 Franççois Marie Daudin French Zoologist
    American Crocodile Crocodylus acutus 1807 Georges Cuvier French Naturalist
    Cuban crocodile Crocodylus rhombifer 1807 Georges Cuvier French Naturalist
    Cuvier’s dwarf caiman Paleosuchus palpebrosus 1807 Georges Cuvier French Naturalist
    Orinoco crocodile Crocodylus intermedius 1819 Graves n/a
    Black Caiman Melanosuchus niger 1825 Johann Baptist von Spix German Biologist
    West African slender-snouted crocodile Mecistops cataphractus 1825 Georges Cuvier French Naturalist
    Mugger crocodile Crocodylus palustris 1831 Renéé Lesson French Herpetologist
    False gharial Tomistoma schlegelii 1838 Salomon Müüller German Naturalist
    Morelet’s crocodile Crocodylus moreletii 1851 Gabriel Bibron & Andréé Marie Constant Dumééril French Zoologists
    Dwarf crocodile Osteolaemus tetraspis 1861 Edward Drinker Cope American Herpetologist
    Australian Freshwater crocodile Crocodylus johnsoni 1873 Gerard Krefft Australian Zoologist
    Chinese Alligator Alligator sinensis 1879 Albert-Auguste Fauvel French Naturalist
    New Guinea crocodile Crocodylus novaeguineae 1928 Karl Patterson Schmidt American Herpetologist
    Philippine crocodile Crocodylus mindorensis 1935 Karl Patterson Schmidt American Herpetologist

    Crocodiles Distribution By Countries/Regions

    Common Name Binomial Name Countries/Regions
    Nile crocodile Crocodylus niloticus Africa
    American Crocodile Crocodylus acutus Americas
    Cuvier’s dwarf caiman Paleosuchus palpebrosus Americas
    Saltwater crocodile Crocodylus porosus Asia
    Siamese crocodile Crocodylus siamensis Asia
    Australian Freshwater crocodile Crocodylus johnsoni Australia
    Chinese Alligator Alligator sinensis China
    Cuban crocodile Crocodylus rhombifer Cuba
    Gharial Gavialis gangeticus Indian Subcontintent
    Mugger crocodile Crocodylus palustris Indian Subcontintent
    Spectacled Caiman Caiman crocodilus Latin America
    Morelet’s crocodile Crocodylus moreletii Mexico, Belize, Guatemala
    New Guinea crocodile Crocodylus novaeguineae New Guinea
    False gharial Tomistoma schlegelii Peninsular Malaysia
    Philippine crocodile Crocodylus mindorensis Philippines
    Schneider’s dwarf caiman Paleosuchus trigonatus South America
    Broad-snouted Caiman Caiman latirostris South America
    Jacare Caiman Caiman yacare South America
    Orinoco crocodile Crocodylus intermedius South America
    Black Caiman Melanosuchus niger South America
    American Alligator Alligator mississippiensis USA
    West African slender-snouted crocodile Mecistops cataphractus West Africa
    Dwarf crocodile Osteolaemus tetraspis West Africa

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