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In 1900 The Lacey Act is set to regulate imported species.
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The Africanized honeybee was introduced into California in 1950.
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Queen bees accidentally released in 1957 in Southern Brazil.
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In 1985 they say they spread into America North West and killed 2,011 people and animals.
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The Africanized honey bees swarmed 11 animals in 1998
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In 2012 the bees moved to San Diego and kiled 53 people and animals by swarms