reptiles. adapted for life on land ectothermic –all reptiles are ectotherms meaning...
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Reptiles
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Adapted for Life On Land• Ectothermic
– All reptiles are ectotherms meaning “cold-blooded.”– THINK! – How do cold-blooded animals maintain their body temperature?
• Whatever the temperature that their environment is becomes their body temp
• Skin– Reptiles have dry, tough skin covered with scales– Scaly skin helps keep water in their bodies and protect them
• Kidneys– Clean the blood of waste and excretes it as urine– The kidneys concentrate urine so much that the animal loses little water
• Egg with Shell– A reptile egg has a leathery shell to keep it moist– This egg is called an amniotic egg
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Lizards
• Features– These reptiles have skin covered with
overlapping scales
• Feeding– Most lizards are carnivores.
– THINK! – What do carnivores eat?
• meat
• To the right is a Boyd's Dragon found in the Kuranda Rainforest of Australia.
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Snakes• Features
– Snakes have no legs, no eyelids, no ears, and just one lung.
– Snakes such as rattle heads and copperheads have venom glands attached to their fangs.
• Feeding– All snakes are carnivores.
• Let’s check out some snakes seen at the Australia Zoo
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Venomous Snakes of Australia
Fierce Snake – World’sMost venomous snake!
Black Tiger Snake
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Local Snakes of Australia
Green Python – A stunningsnake that blends into theRainforest greenery!
Carpet Python – A harmless Snake you find around suburban areas! Great if you have a rodent problem!
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Turtles & Tortoises• Features
– A turtles gender is determined by the incubation temperature of the eggs.
• Feeding– Some turtles are
carnivores and some are herbivores like the Galapagos tortoise!
– THINK! – What does a herbivore eat?
• Plants
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Alligators & Crocodiles
• Features– THINK! – How can you tell the
difference between an alligator & a crocodile?
– Alligators have broad, round snouts with only a few visible teeth when their mouths are shut.
– Crocodiles have pointed snouts with most of their teeth visible when their mouths are shut.
• Feeding– The largest reptiles still living on Earth
and are also carnivores.
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Enjoying the Croc Show At the Australia Zoo!
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Let’s Cruise the Daintree River & Try to Spot Some Crocs!
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Can You Spot a Croc?
Our fearless leader on the boat!
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The Second Sighting
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The Third Sighting
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We were the Luckiest Group! A baby hatchling not more than a month old!
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Cool Reptile Facts
• Most reptiles have a 3-chambered heart. Crocodiles have 4 chambers.
• By 2080, 20% of lizard species will be extinct due to global warming.
• The Nile Crocodile can reach 20 feet long and weigh up to 1,650 lbs.
(largest reptile!)
• A King Cobra can deliver enough venom in one bite to kill 20 people.
• Snakes use their forked tongue to sense.
• Green Anacondas can weigh up to 550 lbs.
• Black Mamba is the world’s deadliest snake.
• Most newborn snakes are born with a single tooth. Why?
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Critter Cards
• Select one of the following reptiles: lizards, snakes, turtles, alligator, or crocodile to research.
• Use the template to take notes on your reptile.
• Then, arrange the information on a 5” X 8” unlined index card. You may choose to use the computer to generate your information.