Native vs. Non-Native Species European Red Squirrel in Europe North American Grey Squirrel in Europe

Native species: An animal or plant that have developed, occurs naturally, and have existed for many years in an area Coyote Mountain lion Sequoia Tree

Non- Native species: An introduced plant or animal living outside its native region, which have arrived by human activity, either deliberate or accidental. They have NO natural predators allowing them to cause significant damage Black Rat- spread across the world American Bison- to Santa Catalina Island Zebra Mussel- Great Lakes and San Francisco Bay

Invasive species: Is a non-native species that negatively affects its environment Zebra Mussel in the Great Lakes Burmese Python in the Florida Everglades

Zebra mussels on a crayfish

Extinction: A species goes extinct when the last living member dies Extinction: A species goes extinct when the last living member dies. It is estimated that 99.9% of all species that ever lived are extinct.