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In the 1950s, the aggressive insect known as the "killer bee" headed northward. Also called Africanized honeybees, this invasive species disrupts the ecosystems it enters, as readers of this fascinating book will discover. Fact boxes, a map, and a quiz help budding ecologists understand key topics. With discussions about ecosystem balance, food chains, and conservation, the main content undoubtedly aids and supplements the science curriculum.