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  • Many animal species are at risk of becoming extinct, or dying out. Although natural causes can be a factor, humans are largely responsible. Activities such as logging, farming, and construction have destroyed many animal habitats, and illegal hunting has only added to the problem. A group called the International Union for Conservation of Nature (IUCN) surveys different animal populations to determine if they are at risk.

  • Term Part of Speech Definition Encyclopedic Entry
    critically endangered Noun

    level of conservation between "endangered" and "extinct in the wild."

    endangered species Noun

    organism threatened with extinction.

    Encyclopedic Entry: endangered species
    extinct Adjective

    no longer existing.

    habitat Noun

    environment where an organism lives throughout the year or for shorter periods of time.

    Encyclopedic Entry: habitat
    pesticide Noun

    natural or manufactured substance used to kill organisms that threaten agriculture or are undesirable. Pesticides can be fungicides (which kill harmful fungi), insecticides (which kill harmful insects), herbicides (which kill harmful plants), or rodenticides (which kill harmful rodents.)

    poach Verb

    to hunt, trap, or fish illegally.