It is the evening of 26August 2009 on Christmas Island. The last known pipistrelle emerges from itsday-time shelter. Scientists, desperate about its conservation, set up a mazeof netting to try to catch it. But the bat evades the trap easily, andcontinues foraging. It is not recorded again that night, and not at all thenext night, or ever again. The scientists search all nearby areas over thefollowing nights. It has gone. There are no more bats...