What is an interesting fact about Crocodiles? | What is the lifespan of a Crocodile?

What is an interesting fact about #Crocodiles? | What is the lifespan of a #Crocodile?
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Crocodile Classification and Evolution
Crocodiles are one of the most well-known and fearsome animals in the world, and considered an apex predator.
Their powerful bodies, strong jaws and immense speed and agility along with their unparalleled stealth, has lead to them being one of the world’s most apex predators in their natural environments.
Closely related to other crocodilians including alligators, caimans, and gharials, crocodiles have changed very little in an evolutionary sense in 200 million years.
Unlike other reptile species, crocodilians are archosaurs which is an ancient group of reptiles that also included dinosaurs.
Although dinosaurs became extinct 65 million years ago, crocodiles are thought to have survived so well over time due to the fact that they are so well suited to their environments.
Today, there are 13 different crocodile species that are found inhabiting both fresh and saltwater environments throughout North and South America, Africa, Asia and Australia.
Their semi-aquatic nature has led to them evolving a number of key adaptations that allow them to survive so successfully in their natural environments.

Crocodile Anatomy and Appearance
Crocodiles are large-sized reptiles with thick, scaly skin that is made up of armoured, waterproof plates that both protects them from potential predators and also prevents their bodies from drying out.
These scales come in a variety of colours from dull olive and green, to brown, greys and black meaning that they are very easily camouflaged in the surrounding water and vegetation.
Like other crocodilian species, their eyes and nostrils are located on the very top of their broad head and snout so that they can lay in wait in the water with almost none of their bodies exposed in order to more successfully ambush prey.
Their vertically flattened tails are immensely strong and are used to propel them through the water, as although they do have webbed feet, they do not use them to aid them when swimming.
In order to protect them in the water, crocodiles have a special transparent third eyelid which allows them to leave their eyes open but prevents damage from the water.
They also have external flaps that close off their ears and nostrils, and a special respiratory system that allows them to remain in the water for up to five hours at a time.
Crocodiles range in size from the less than 2 metre long dwarf crocodile to the 7 metre long estuarine crocodile (also known as the saltwater crocodile or “saltie”), which is the world’s heaviest reptile weighing up to 1,000kg.
Crocodile Distribution and Habitat
Crocodiles are found in a variety of wetland habitats throughout the warmer tropical waters in the southern Hemisphere.
Their inability to internally regulate their body temperature means that they rely heavily on the sun to warm their bodies up after it being cooled by spending time in the water.
The American Crocodile is the largest crocodilian species in North and South America and is found inhabiting freshwater rivers and lakes, along with brackish coastal waters near estuaries and in lagoons from southern Florida, throughout Central America and into northern parts of South America.
Over in Africa, the Nile Crocodile was once widespread in eastern and southern Africa but are now scarcer.
They inhabit freshwater marshes, rivers, lakes and mangrove swamps.
The world’s largest and most widely dispersed crocodile species is the estuarine crocodile.
These formidable reptilian giants are found in river mouths and brackish swamps from the Bay of Bengal in the Indian Ocean, across to and throughout Southeast Asia and down into Australia.

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