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One that originated in that place and was not introduced from Another Country or region. ie. the grey squirrel was introduced into England from another country and has now almost wiped out the indigenous red squirrel. Rabbits introduced into Australia for food by early settlers had a devastating effect on the local environment and indigenous species etc. as they bred quickly and abundantly and rapidly demolished huge areas of grassland etc., so also affecting the food chain for exisiting animals. The same has happened where plants have wiped out indigenous species.

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17y ago

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