Forest Chaser Dragonfly, Taiwan, 2006Photograph by Jozsef SzentpeteriA male forest chaser dragonfly displays its gossamer wings in Taiwan. Dragonflies look enough like wasps or stinging flies to instill trepidation among humans. They've been dubbed devil's darning needles, horse stingers, and finger cutters. In fact, these aerial acrobats are harmless, neither nuisance nor danger—unless you're a mosquito.