Difference between Crocodiles and Alligators

What are the differences between crocodiles and alligators. The most common difference between the alligators and crocodiles comes from their appearance. Crocodiles have longer snouts and alligators have shorter snouts. Both are from the different families. Lifespan of the crocodiles and alligators is also different because the crocodiles live longer than alligators.

Alligators Crocodiles
Order Crocodilia Crocodilia
Family Alligatoridae Crocodylidae
Number of Species 2 +12
Warm-blooded or cold-blooded? Cold-blooded Cold-blooded
Distinguishing Feature Wide U-shaped snouts; dark hide color Narrow V-shaped snouts; light hide color; “toothy smiles”
Lifespan 30-50 years 70-100 years
Weight and Height 70-1000 pounds; 4,5-15 feet 13-2000 pounds; 6-20 feet
Preferred Habitat Fresh water environments Fresh and salt water environment
Predators No natural predators No natural predators
Prey Birds, fish, reptiles, small mammals and fruit Frogs, birds, fish, crustaceans and large mammals
Mating Season April-June July-August
Location U.S. (Southern); China (eastern) All over the world

:small_blue_diamond: Crocodiles and alligators share many similarities but there are some obvious differences between them. In this article we will describe the key differences between crocodiles and alligators.

Overview of Crocodile vs Alligator

:small_blue_diamond: Crocodiles and alligators are reptiles from the same order, crocodilian. Both have been around for about 199 million years. They are able to live on both water and land and that’s why known as the semiaquatic. They are the excellent stealth hunters with powerful jaws and keen vision.

:small_blue_diamond: From Spanish word el lagarto, which means “the lizard”, the word “alligator” originated. It is described as “any broad-snout crocodilian.” Their family is known as the Alligatoridae within the Crocodilian order.

:small_blue_diamond: From the Ancient Greek word krokodeilos, which also means “lizard”, the word “crocodile” originated. Their family is known as the Crocodylidae within the Crocodilian order.

:small_blue_diamond: Species of crocodiles are over a dozen and the species of alligators are only two that are found around the world. Following is the list of crocodile vs alligator species:

Crocodile Species

  • Slender-Snouted (Crocodylus cataphractus)

  • Siamese (Crocodylus siamensis)

  • Saltwater (Crocodylus porosus)

  • Philippine (Crocodylus mindorensis)

  • Orinco (Crocodylus intermedius)

  • Nile (Crocodylus niloticus)

  • New Guinea (Crocodylus novaeguineae)

  • Mugger (Crocodylus palustris)

  • Morelet’s (Crocodylus moreletii)

  • Gharial (Gavialis gangeticus)

  • Fresh water (Crocodylus johnsoni)

  • Dwarf (Osteolaemus tetraspis)

  • Cuban (Crocodylus rhombifer)

  • American (Crocodylus acutus)

Alligator Species

  • Chinese (Alligator sinensis)

  • American (Alligator mississippiensis)

Crocodile vs Alligator

Main Differences between Crocodile and Alligator

:small_blue_diamond: Many people are not aware of the difference between a crocodiles and alligators and utilized both terms interchangeably to define the any large water-dwelling lizard with huge teeth. People do not realize that despite some similarities both don’t behave or look same. Both have different biological families. Following are the main differences between crocodile and alligator.

1. Appearance Difference

:small_blue_diamond: The most common difference between the alligators and crocodiles comes from their appearance. Physiology of all the crocodilians is roughly the same. They have a lizard-like body and a scaly, tough skin, with an elongated tails and snout. They have four legs and their legs are small in comparison to their overall body. They have webbed toes, nostrils and years and they have eyes that sit on the top of their head.

:small_blue_diamond: They are cold-blooded and to help regulate their body temperature utilize their environment. To get warm they hang out in the sun and to cool down they sleep into the shade or water. They are also described by their jaws which have weak muscles for opening and powerful muscles for closing.

:small_blue_diamond: One obvious difference between the crocodile and alligator species is their snouts. Alligators have wide, U-shaped snouts. The snouts help them crack through tough shells of prey. In alligators usually one teeth from top part of their mouths are visible when they close their mouths. Alligators on average tend to be smaller than the crocodiles.

:small_blue_diamond: The snouts in crocodile are narrow, long and pointed V-shaped and these snouts are great for cracking through diversity of prey that crocodiles around the world eat. Crocodiles on average are tend to be larger than the alligators.

2. Color Difference

:small_blue_diamond: Crocodile hides have light tan or olive color and alligator often appearing dark gray and black in color and that’s why they are known to have darker hides than crocodiles. The quality of water in which the alligator swims determines the exact shade of an alligator skin. Tannic acid and algae will also change their color the tannic acid from the overhanging trees will make them darker and algae will make them greener.

Crocodile vs Alligator

3. Habitat: Freshwater or Saltwater

:small_blue_diamond: Habitat of the crocodiles is the salt water. There are special glands in the tongue of crocodiles which excrete excess salt from their bodies. This indicates that they are capable spending days or even weeks at sea.

:small_blue_diamond: Habitat of the alligators is the freshwater. They also have special glands in their tongue but they don’t work as well and that’s why they usually stick to freshwater habitats but sometimes they are also found in brackish water. A mixture of fresh water and salt is known as the brackish water.

:small_blue_diamond: This difference actually describes why crocodiles have managed to spread across the islands of the Caribbean and alligators haven’t.

4. Where Do Alligators and Crocodiles Live?

:small_blue_diamond: In southeastern US and eastern China the alligators are found. In Africa, South America, Australia, North America, Southeast Asia and Central America the crocodiles are found. If you are in US then there are more chances that you encounter an alligator instead crocodile. In the southernmost tip of Florida only the American crocodile species live.

:small_blue_diamond: Alligators are found across Louisiana and Florida as well as in parts of Mississippi, Georgia, Texas, Oklahoma, North and South Carolina and Arkansas. Because alligators prefer freshwater environments and warmer climates and they can’t process salt the way crocodiles can.

:small_blue_diamond: In the US alligators heavily outnumber crocodiles. There are over 3.5 million alligators, but fewer than 2100 crocodiles. In the world South Florida is the only place where you will find alligators and crocodiles living side by side.

:small_blue_diamond: Crocodiles can live in both saltwater and freshwater habitats. They are found throughout the world because of their adaptability. Europe and Antarctica are the only continents that don’t have crocodiles.

5. They have different Teeth

:small_blue_diamond: Snouts of crocodiles and alligators are easy to tell apart when their mouths are closed, because the bottom teeth of the alligator are not visible but the crocodile’s lower fourth tooth can always be seen.

:small_blue_diamond: Many teeth of crocodiles are visible because they are sticking out over their lips giving them a toothy smile. Alligators can hide all its teeth when their mouth is closed.

6. Which are bigger: Crocodiles or Alligators

:small_blue_diamond: Crocodiles are bigger than alligators because the maximum length of crocodile is 19 feet and the maximum length of alligators is 14 feet. Alligators are weighing anywhere from 80 to 1000pounds. Chinese alligators are generally shorter than their American counterparts; they have been measured at 4 to 5 feet, whereas the American alligators can range from 11 to 14 feet in length.

:small_blue_diamond: Size of the crocodiles varies due to the number of species there are. The smallest species weigh around 12 to 16 pounds and can measure about 5 feet in length, whereas the largest species weigh close 2000 pounds and can measure more than 20 feet in length.

7. Which runs and swims faster: Crocodile and an alligator

:small_blue_diamond: On Land: For short distances both can move quickly on land. Both have the ability of “sprint” and “gallop” but they do it when threatened, and not for long. An alligator runs faster than the crocodile because an alligator might reach a maximum speed of about 10 mph(17kph) and a crocodile might reach almost 9 mph(14kph).

:small_blue_diamond: In Water: In water they are both much more fast and agile. In water they can utilize their muscular long tails to propel their bodies forward. An alligators swims faster than the crocodile because an alligator might reach the speed of maximum 20 mph (32 kph) and crocodiles during the swimming might reach speeds of about 9 mph (15 kph).

8. Which is more Aggressive: An alligator or a crocodile?

:small_blue_diamond: Crocodiles: They are far more likely to attack humans, even unprovoked and they are much more bad-tempered. The most dangerous crocodiles that are considered in the world are the American crocodiles and they are one of the more timid types that you will find. They rarely attack humans. You are more likely to be attacked by an alligator than a crocodile in the US, although the attacks by an alligator or a crocodile are very rare.

:small_blue_diamond: Alligators: They are dangerous but compared to the crocodile are relatively timid. If approached by humans an alligator will usually try to escape generally heading for the nearest water. When the alligators are unexpectedly provoked, disturbed or defending their young, this is the only time that wild alligators will attack humans.

:small_blue_diamond: Alligators are naturally afraid of humans but with regular contact they can lose some of that fear. Except in control conditions, feeding them is almost always not a good idea as they will lose some of their fear and find humans as a source of food. For prey they can also mistake pet dogs and small children.

9. Family

:small_blue_diamond: Crocodiles and alligators are from the different families but they are from the same scientific order. Both are the members of Crocodylia but the family of crocodiles is the Crocodylidae and the family of the alligators is the Alligatordae.

10. Skill

:small_blue_diamond: Both the crocodiles and alligators are the excellent hunters because they have an extremely heightened sense. Both crocodiles and alligators are a nightmare for their prey with above-water, sharp vision, sensitive hearing, night vision and vertical pupils. During the everglades airboat tour you can expect to see both the crocodile and alligator peeping them eyes up due to their above-water vision.

:small_blue_diamond: To detect pressure changes in the water and to capture and locate the prey both the crocodiles and alligators have small sensory pits along their jaws. Both animals prefer to swallow large chunks or swallow the animal whole and are not the fan of chewing their food.

:small_blue_diamond: Salt glands of crocodiles are higher functioning and due to these glands they excrete higher amounts of salt from the water than alligators can. Alligators prefer freshwater and less tolerant to saltwater environment because alligator’s glands do no function as strongly. Crocodiles are successful in migrating across multiple marine bodies with this capability.

11. Lifespan

:small_blue_diamond: Lifespan of the crocodiles is longer than the alligators. Between 70-100 years is the average lifespan of a crocodile. Average lifespan of an alligator is generally between 30-50 years.

Habits and Behaviors of Alligators and crocodiles

Alligators and crocodiles have some amazing habits and social behaviors particular to their species.

Socialization and play

:small_blue_diamond: The most social species of reptiles are crocodiles. While perceived as quite single creatures, crocodiles for hunting and raising their babies will join forces. They form long-term relationships with one another.

:small_blue_diamond: Based on the height and size crocodiles have their own social hierarchy, which decides who gets the good spot for soaking up the sun to assist regulate their body temperature and who gets priority eating in huge group feedings.

:small_blue_diamond: They play with each other and with other animals and humans. Despite this tendency for fun, crocodiles are still the most aggressive animals especially when it comes to their children and territory. If provoked or threatened crocodiles will attack and kill humans.

:small_blue_diamond: Alligators spend time with their reptilian cousins while swimming and basking but they are considered less social than their reptilian cousins. A group of alligators which tends to be made up of smaller alligators rather than larger ones who are more solitary and territorial is called a congregation.

:small_blue_diamond: In the mud or dirt alligators dig “gator holes” when the weather gets to be too much. These holes assist save them from extreme temperatures (cold and hot).


:small_blue_diamond: Alligators and crocodiles in terms of movement are similarly athletic because both animals can run on land reaching speeds of about 10 miles per hour; but their strength is swimming. Per hour in the water alligators can reach speeds upward of 19 miles and for an hour can stay submerged at a time.


:small_blue_diamond: Alligators start mating in the late spring and continue into the summer when they are not racing for food. Crocodiles don’t start mating in the summer months (July-August). At a time both crocodiles and alligators can lay dozens of eggs, with the former averaging 21-49 eggs per batch and the latter averaging 11-59 eggs per batch.

Relationship between Alligators, Crocodiles and Humans?

:small_blue_diamond: Crocodiles and alligators appear in the human environments as the human population continues to spread out. Fresh water habitats of alligators are threatened by the climate change. As the rise in sea water could overwhelm freshwater sources with salt water.

:small_blue_diamond: Due to being hunted by humans for their skin, the loss of their habitats and contamination of their food from pesticides certain species are facing extinction.

:small_blue_diamond: Crocodiles that are considered critically endangered are the Orinoco, Cuban and Philippine. However, many other crocodile species are considered vulnerable.

:small_blue_diamond: In case of alligators Chinese alligators are critically endangered you are probably to see one in the zoo than in the wild, where reportedly fewer than 129 of them are left.

Alligator vs Crocodile: Diet

:small_blue_diamond: Alligators and crocodiles are the carnivores. The metabolism of both the crocodiles and alligators is slow. They are known to swallow prey whole because they cannot chew their food. Alligators eat everything fish and birds to other reptiles, small mammals and fruit.

:small_blue_diamond: Crocodiles tend to eat birds, fish, large mammals (zebras and wildebeest) and crustaceans (crab) because of their salt water environment.

:small_blue_diamond: Crocodiles and alligators are called apex predators and this means that they are at the top of their food chains and are important to maintaining a habitat’s biodiversity.

:small_blue_diamond: However, alligators and crocodiles are not immune to being hunted. Big cats such as lions, jaguars and tigers have been known to eat and hunt crocodiles when the hunger strikes.

Frequently Asked Questions

Here are some frequently asked questions regarding the difference between crocodiles vs alligators

Q1. Are alligators and crocodiles the same species?

Crocodiles and alligators are the same species. Crocodilia is an order of semiaquatic, large and predatory reptiles that includes gharai, caimans, crocodiles and alligators. These are all crocodilians but only some are true crocodiles.

Q2. Alligator vs Crocodile: Which is stronger? If they fought, who would win?

Crocodiles are stronger than the alligators because the strongest crocodiles’ are about 3700 pounds and alligators’ bites are about 2900. For bite strength alone crocodiles might win. Crocodiles win again in terms of size because the largest recorded crocodile was about 1900 pounds and over 22 feet long and the biggest recorded alligator was about 900 pounds and 18 feet long.

Crocodiles win again in terms of aggression because they are much more aggressive and even if provoked they are more probably to attack.

Q3. Which are more dangerous to humans?

Humans are most afraid of Nile crocodile according to the CrocBITE. CrocBITE is actually a database that keeps track of crocodilian attacks worldwide. There have been 33 human fatalities since the year 2000 caused by American alligators and crocodiles combined compared to 267 caused by Nile crocodiles alone.

Q4. Does Florida have crocodiles or alligators?

Florida has both the crocodiles and alligators but alligators are more in number than the crocodiles. In all over the Florida the alligators live mostly in freshwater, such as rivers, swamps and lake however, sometimes they can be found in brackish water. Crocodiles are found on the southernmost tip of Florida and there are less than 1900 of them according to estimates, they live in salt-water and brackish habitats.

Q5. Why do the alligators swim away when humans approach?

Alligators swim away when humans approached because the wild alligators have a natural fear of human beings and they will generally attempt to escape if any human approached. If they become used to humans they can lose their built-in fear. That’s why you should never feed wild alligators.

Q6. Can an alligator and a crocodile have kids together?

No, an alligator and a crocodile cannot have kids together because they belong to the different species although they might look fairly similar. This necessarily means that they are genetically different to produce the children. So we don’t expect to see any “crocogators” soon!

Q7. Can an alligator kill a crocodile?

Southernmost tip of Florida is actually only one place in the world where alligators and crocodiles live side by side. Both the crocodiles and alligators don’t usually fight but crocodiles are usually more aggressive than the alligators.

Q8. What type of the crocodiles are strongest?

Most aggressive and largest type of crocodile is the saltwater crocodile. Saltwater are also the largest living reptile. They can be found on the northern coast of Australia and in southeast Asia.

Q9. Can an alligator be careful and calm too?

Truly speaking, alligators are scared and afraid of human beings. They spend most of their day time basking in the sun and they hunt in the night time. It’s necessary to remember that they are reptiles and usually are not as intelligent as large mammals. By not moving they can spend long periods of time, then immediately burst into action.

Q10. Do alligators hunt on land?

To catch prey the preferred method for alligators is to trap animals at the water’s edge and drag them into the water. But adults will sometimes venture up to 169 feet (49 m) from water to look for prey. By trial sides they will wait and then stage a trap on passing animals.


:white_check_mark: The most common difference between the alligators and crocodiles comes from their appearance. Alligators have wide U shaped snout and crocodiles have elongated V shaped snouts. Species of crocodiles are over a dozen and the species of alligators are only two. Both have different biological families. Alligators on average tend to be smaller than the crocodiles. Crocodile hides have light tan or olive color and alligator often appearing dark gray and black in color.

:white_check_mark: Habitat of the crocodiles is the salt water and the habitat of the alligators is the freshwater. An alligator runs and swims faster than the crocodile. Crocodiles are more aggressive than the alligators because the alligators are timid and afraid of human beings.

:white_check_mark: Lifespan of the crocodiles is longer than the alligators. Between 70-100 years is the average lifespan of a crocodile. Average lifespan of an alligator is generally between 30-50 years. Both the crocodiles and alligators are cold-blooded.

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