A species of Wasp in Costa Rica sting spiders and lay their eggs inside them. The spiders then lay an especially strong web to support the wasp larva and then dies. When the larva is born it eats the spider!
Portrait of an invader
Portrait of an invader Researchers are starting to get a clearer picture
of why the water hyacinth has been such an aggressive invader
species in Africa's Lake Victoria. There are three rivers which
feed into Lake Victoria and they inject huge amounts of
nutrient-rich sediment into the lake. These feed the weed and
promote its quick growth. 26 NOVEMBER 1999, P. 1675
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