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A glossary:
• Extinct--no longer existing in living form; extinction is the eradication of an entire species
• Endangered--at significant risk of extinction
• Extirpated--locally eliminated from an ecosystem; extirpation is the total elimination of a regional population of a species
• Native--occurring or living naturally in an area; indigenous
• Endemic--not only native to a region but occurring nowhere else
• Alien--living outside of its natural geographic range; alien species are also referred to as exotic, introduced, nonnative, nonindigenous, or invasive species
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