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REPTILES “to creep” In the class REPTILIA… LIZARDS, SNAKES, TURTLES, CROCODILIANS, and BIRDS.

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Presentation on theme: "REPTILES “to creep” In the class REPTILIA… LIZARDS, SNAKES, TURTLES, CROCODILIANS, and BIRDS."— Presentation transcript:

1 REPTILES “to creep” In the class REPTILIA… LIZARDS, SNAKES, TURTLES, CROCODILIANS, and BIRDS

2 WHERE DID THEY COME FROM?

3 Have been around for over 300 million years Have been around for over 300 million years After the decline of amphibians, reptiles dominated the world for about 200 million years in the time of the Dinosaurs (the most diverse group of reptiles that are now extinct) After the decline of amphibians, reptiles dominated the world for about 200 million years in the time of the Dinosaurs (the most diverse group of reptiles that are now extinct) – Differences between some Dinosaurs and modern reptiles: Dinosaurs may have been endothermic Dinosaurs may have been endothermic Dinosaurs may have exhibited parental care Dinosaurs may have exhibited parental care Dinosaurs were much bigger (and some were significantly slower moving) Dinosaurs were much bigger (and some were significantly slower moving) Now, there are about 6,500 reptile species around the world and on every continent except Antarctica Now, there are about 6,500 reptile species around the world and on every continent except Antarctica

4 WHAT MAKES REPTILES REPTILES?

5 VERTEBRATES (have spines) AIR-BREATHING COLD-BLOODED or ECTOTHERMIC (absorb external heat/ do not generate their own heat through metabolism) AMNIOTES (lay an amniotic egg* which is a shell carrying an embryo in a fluid- filled sac) LIVE ON LAND COVERED IN SCALES * This characteristic of reptiles helped their ancestors make the transition from water to land because the “self- contained pond” of the egg which can be lane on land allows the reptile to carry out its life cycle completely on dry land.

6 SOME ADAPTATIONS…

7 Regulate their body temperature by seeking or avoiding the sun’s heat (ectothermic)

8 Skin is covered in waterproof scales containing the protein keratin which lets no water escape which keeps their bodies from drying out (Eggs are also encased by a waterproof shell)

9 Color and scale pattern helps camouflage or alert predators to a reptile’s poisonous nature (mostly snakes )

10 SNAKES -Limbless (ancestors adapted to a burrowing lifestyle) -Venom helps protect them or immobilize and kill pray

11 CROCODILIANS (crocodiles and alligators) -Can live in the water and breath with upturned nostrils

12 TURTLES (have changed little overtime) - Hard-backed, protective shells

13 SOME SPECIFICS…

14 Most massive reptile: The estuarine crocodile (over 7 m (23 ft) long)

15 the British Virgin Islands gecko (only 18 mm = 7/10 inches long) Smallest Reptile:

16 the spiny-tailed iguana (tracked at 34.9 km/h = 21 mph) Fastest Reptile:

17 the anaconda of South America Biggest snake:

18 the leatherback turtle (up to 2.5 m) Biggest Turtle:

19 the Komodo dragon (up to 3 m long) Biggest Lizard:

20 reticulated Python (over 10 m long) Longest snake:

21 the poisonous black mamba Fastest-moving snake:

22 the taipan (from Australia), black mamba, and krait Most poisonous land snakes:

23 the Gila monster, the beaded lizard Only poisonous Lizard:

24 horned lizards can squirt a thin spray of blood from their eyes up to of 3 feet (0.9 meter) away Weirdest ability:

25 HERPETOLOGY = the study of reptiles

26 Works Cited -dinosaurs jupiter-lw.jpg -dinosaurs jupiter-lw.jpg place.jpg place.jpg url=http://lynhardyphoto.com/page_reptiles.html&usg url=http://lynhardyphoto.com/page_reptiles.html&usg

27 Works Cited cont ndangeredspecies/komodocrop-7899.jpg ndangeredspecies/komodocrop-7899.jpg horned_lizard_full.jpg horned_lizard_full.jpg


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