🐾 Crocodile

Crocodile

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Who it is

• Scientific name: Crocodylus niloticus (Nile); Crocodylus porosus (Saltwater)
• Family & relatives: Members of the family Crocodylidae; relatives include alligators, caimans, and gharials.
• How to spot it: Recognize them by a long V-shaped snout with teeth showing when the mouth is closed, and bony plates along the back.

Its body & abilities

• Size: Saltwater crocodiles can exceed 6 m long; Nile crocodiles commonly reach 4-5 m.
• Weight: Large males can weigh over 1,000 kg in saltwater crocodiles.
• Body & adaptations: Eyes, ears, and nostrils sit on top of the head so it can float almost hidden, and a clear third eyelid protects the eyes underwater.
• Top speed: Can burst up to about 12-14 km/h swimming and lunge explosively over short distances on land.
• Strength: Has one of the strongest bites ever measured, over 16,000 newtons in large saltwater crocodiles.
• Senses: Excellent night vision, sensitive skin dots that detect water ripples, and good hearing.
• Growing up: Hatchlings emerge from eggs and grow slowly, taking about 10-12 years to reach breeding size.

Where it lives

• Habitat: Rivers, lakes, swamps, estuaries, and coastal mangroves in warm climates.
• Where in the world: Nile crocodiles across sub-Saharan Africa; saltwater crocodiles from India through Southeast Asia to northern Australia.
• Territory: Dominant males defend stretches of water, especially during breeding season.

What it eats

• Diet: Carnivore; drinks fresh water and, in saltwater species, sheds excess salt through special glands.
• Favorite foods: Fish, birds, turtles, and mammals as large as antelope, buffalo, or zebra.
• How it hunts: An ambush hunter that floats motionless, then explodes from the water and uses a 'death roll' to subdue prey.

How it behaves

• How it moves: Swims with powerful tail strokes and can 'high-walk' or even gallop briefly on land.
• When it is active: Mostly nocturnal hunters that bask in the sun by day to warm up.
• Family life: Largely solitary but gather at basking spots and feasts; a group is called a 'bask' or 'float'.
• How it talks: Communicate with bellows, hisses, and infrasound water 'dances' that ripple the surface.
• Babies: Females lay 20-80 eggs in a nest and guard them for about 3 months; nest temperature decides the hatchlings' sex.

Its place in nature

• Role in nature: A top predator that keeps fish and prey populations in balance; only humans and, for young, big cats and birds threaten adults.
• Conservation: Both the Nile and saltwater crocodile are IUCN Least Concern, though local populations face habitat loss and hunting.
• Dangers: Most eggs and hatchlings are eaten by predators; adults mainly die from humans and territorial fights.

Life & legacy

• How long it lives: Often 50-70 years in the wild, and sometimes over 70 in captivity.
• In our culture: Revered in ancient Egypt as the god Sobek and feared and respected across many cultures.
• Where to see it: Seen in African rivers like the Nile, Australia's Kakadu National Park, and reputable wildlife parks.
• Fun fact: Crocodiles have barely changed in body plan for around 200 million years, outliving the dinosaurs.