40 Interesting Facts About Crocodiles

  1. There are 23 living species of crocodiles on earth. At least 7 of them are extremely dangerous for humans. (Source)
  2. The range of crocodiles is in the continents of Asia, Africa, Australia, and the Americas.
  3. Crocodiles twist their prey violently to tear it apart. This process is known as the “death roll,” which is present in 24 of the 25 living species of crocodiles. (Source)
  4. Due to the lack of sex-determined chromosomes, the nest temperature determines the gender of eggs in alligators. Temperature above 34 Celsius in the nest produces all-male offspring. (Source)
  5. The largest crocodile is the Saltwater Crocodile (20 to 23 feet in length and 1,000 to 1,200 kg in weight). It has a presence from the eastern coast of India to Southeast Asia and Australia.
  6. The saltwater crocodile is the largest living reptile on earth. Nine of the ten largest living reptiles on earth belong to the crocodile family. (Source)
  7. It is a myth that crocodiles allow small birds to clean their teeth. Crocodiles do not need services from any bird for teeth cleaning as it replaces those teeth that are broken or have a cavity.
  8. Crocodiles do not have sweat glands. They keep themselves cool on hot days by opening their mouth. (Source
    A crocodile with open mouth
    Crocs keep their bodies cool by opening mouth

  9. The Nile crocodile is the second largest and the most dangerous crocodile. It is involved in more than 300 attacks on humans every year that result in the death of around 200 people.
  10. The largest living croc ever measured was 20.2 feet long and weighed 1,075 kg. This saltwater crocodile was caught alive in 2012 in the Philippines. (Source)
  11. Saltwater crocodiles can find their homes from long distances. They can reach their homes even from hundreds of miles away. (Source)
  12. It is a misconception that crocodiles cannot swallow their food underwater. These reptiles can keep their jaws partially open underwater, which assists them in swallowing their prey. (Source)
  13. Crocodiles can hold their breath underwater for more than an hour. They do so by using a particular protein present in their blood. (Source)
  14. In ancient Egypt, the Nile crocodile was worshiped as a deity (named Sobek). 
  15. In contrast to the hearts of other mammals and birds, the crocodile heart has an extra valve. The crocodiles use this valve to divert a small amount of blood from the lungs directly toward the stomach. This assists in the digestion of food. (Source) 
  16. The dwarf Crocodile (5 to 6 feet in length and 30 to 80 kg in weight) is the smallest crocodile species. It is present in western Africa.
  17. Crocodiles have 24 strong teeth in their mouth but cannot chew their food. They have to swallow their food after tearing it into parts.
  18. Crocodiles have not changed much from their ancestors for the last 65 million years. (Source)
  19. Crocodiles can live for more than 100 years. The longest recorded was a freshwater crocodile that remained alive for 140 years. (Source)
  20. Crocodiles are carnivore animals, but they also enjoy eating fruits occasionally. They also assist in the growth of plants of the fruit they eat by spreading their seeds. (Source)
  21. Saltwater crocodiles have the strongest bite among all the animals. (Source)
  22. Crocodiles quickly replace their lost teeth. In its lifetime, a crocodile can use 8,000 teeth.
  23. An important reason for such a strong bite is the powerful muscles used to close the crocodile’s mouth. But the muscles that open its mouth are weak. An adult man can easily keep the mouth of a crocodile shut if it is already close.
  24. Crocodiles are the most advance and successful freshwater predators. Their success is due to their hard bones, strong jaw muscles, powerful immune systems, fast metabolism, strong stomach acid, complex brain, and strong social structure. They can survive without food for more than a year. (Source
    A crocodile in wildlife park
    Crocs are the most successful freshwater predators

  25. Crocodile skin is famous for its durability and softness. It makes crocodile leather bags and purse one of the most expensive shopping items.
  26. Crocodile eyes shine red at night. It helps them see things clearly at night.
  27. Crocodiles and dinosaurs are not only cousins but also appeared on the earth almost simultaneously (around 240 million years ago). (Source)
  28. Crocodiles and alligators look similar. But they are not only different in appearance (different snouts and toothy grin) but also have different habitats (crocodiles live in saltwater while alligators are present in freshwater). (Source)
  29. Mugger (also known as Indian or Sindhu) Crocodiles are intelligent enough to prey upon birds using sticks. During mating seasons (when birds require sticks to make nests), these crocodiles place sticks on their heads and successfully hunt birds when they come to collect these sticks or branches.
  30. It is a reality that crocodiles shed tears while eating. The possible reason behind this attitude is the hissing and huffing of the animal that produces these tears. (Source) 
  31. Like a few birds, crocodiles also swallow stones frequently. It helps them in digestion and also allows the animal to stay underwater. (Source)
  32. Only 1% of crocodile kids reach adulthood. The remaining 99% lose their lives to other animals before one year.
  33. Crocodiles use their powerful tails while swimming at 25 miles per hour. (Source)
  34. In contrast to their swimming speed, crocodiles can’t run extremely fast on land. They can only run with a maximum speed of 12 to 14 km/h for short periods. (Source)
  35. Birds like herons and egrets build their nests in alligator territory. These wading birds protect alligators’ eggs from predators and provide food to them by throwing away extra chicks from their nests. (Source)
  36. Crocodiles kill about 1,000 humans per year. They are 100 times deadlier to humans than sharks. (Source)
  37. According to a study, few crocodiles were herbivores during the dinosaur era. (Source
  38. Like few other birds and reptiles, crocodiles can sleep with one eye open. They do so to avoid any danger. (Source)
  39. Female crocodiles carry their newborn babies into their mouths and release them in water.
  40. Crocodiles inhabit various environments. They live near rivers, lakes, wetlands, and a few saltwater regions.  

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