Ectoparasite: Parasitic organism that lives on the outside of its host organism.
Eggs: The reproductive cells that are made by female animals and that are fertilized by sperm, or reproductive cells of male animals.
Elytra: The hard, leathery forewings of beetles.
Endangered: Facing a very high risk of extinction in the wild.
Endoparasite: Parasitic organism that lives on the inside of its host organism.
Engorge: To fill up with blood.
Entomologist: A scientist who studies insects.
Estuary: The wide part at the lower end of a river, where the river meets the sea.
Evolution: Gradual process of change over time.
Exoskeleton: An animal's outer covering or supportive structure; the external skeleton or hard outer covering of some animal, especially arthropods.
Extinct: No longer alive.
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