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Crocodiles | Snakes | Turtles | Lizards | Tuatara |
| Reptiles are ectotherms and obtain heat from the external environment |
| Diagram showing the 3 pathways of heat exchange |  |
| In this diagram the lizard is: 1 gaining heat via radiation 2 gaining heat via conduction becasue its body temperature is lower than the ground temperature 3 losing heat via convection because its body temperature is greater than the air temperature |