Ectotherm – an anim
al that does not produce much internal body heat. I have often seen fish in the creek in my backyard, but since the creek is dried up for the summer, I took a picture of our pet betta fish, Garnet; anyway, fish are examples of ectotherms because their body temperatures vary based on the environment that surrounds. 
Endotherm – an animal that can control/ regulate its body temperature by controlling the amount of internal heat it produces. The squirrel on the ledge of our mini-deck is a warm-blooded anima l that can regulate its internal body heat, thereby classifying it as an endotherm.
Great examples!
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