Evolution Of Dragons
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Transcript of Evolution Of Dragons
![Page 1: Evolution Of Dragons](https://reader034.fdocuments.in/reader034/viewer/2022042601/5568fd8fd8b42aff2e8b5119/html5/thumbnails/1.jpg)
Evolution of a Mythic Creature
DRAGONS!
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Ancestry• Related to modern reptiles (dinosaurs, modern
alligators and crocodiles)
![Page 3: Evolution Of Dragons](https://reader034.fdocuments.in/reader034/viewer/2022042601/5568fd8fd8b42aff2e8b5119/html5/thumbnails/3.jpg)
Phylogenetic Tree
Common Lizard Ancestor
Modern Lizards
Dinosaur
Dragon
![Page 4: Evolution Of Dragons](https://reader034.fdocuments.in/reader034/viewer/2022042601/5568fd8fd8b42aff2e8b5119/html5/thumbnails/4.jpg)
Environmental Conditions
• Dragons are generally they are found in rocky or mountainous environments either at high altitudes or living near seaside cliffs
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Adaptations
• Flying is achieved through specialized membranes and jumping into the windy updrafts provided by the currents.
![Page 6: Evolution Of Dragons](https://reader034.fdocuments.in/reader034/viewer/2022042601/5568fd8fd8b42aff2e8b5119/html5/thumbnails/6.jpg)
Adaptations
• Dragons are a top predator, with sharp teeth and claws, similar to eagles.
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Where did the 3rd pair come from?
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Homologous Structures
• Common ancestry with other reptile species is evident with leathery skin and cold blooded nature.
Komodo Dragon Skin (Type of Lizard)
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Analogous Structures
• The Dragon wing is analogous to a bird wing. Both provide a flight mechanism.
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Vestigial Structures• Modern Alligators have a bony structure
right behind the eyes – remnants of dragon horns
![Page 12: Evolution Of Dragons](https://reader034.fdocuments.in/reader034/viewer/2022042601/5568fd8fd8b42aff2e8b5119/html5/thumbnails/12.jpg)
Extinction
• Top/large predators will always have a low population level as the amount of prey to needed sustain them will be correspondingly high.
• Dragons required hundreds of square miles to obtain enough prey.
• Global population was very low
Dragons
Deer
Plants
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Extinction
• Ancestral dragons would gather yearly in global flights. At this time mating would happen.
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Extinction
• As humans encroached further and further into their remote territories, they removed the dragon’s natural food sources and brought new ones – cattle and sheep.
• Subsequent predation (hunting) of the cattle and sheep meant the dragons became the hunted.
![Page 16: Evolution Of Dragons](https://reader034.fdocuments.in/reader034/viewer/2022042601/5568fd8fd8b42aff2e8b5119/html5/thumbnails/16.jpg)
Extinction
• Removal of individual dragons from the gene pool lead to increased inbreeding among the remaining dragons.
• Eventual extinction resulted from a loss of habitat, genetic weakness and human competition.
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• Could you believe in dragons now?