17 years to meet. it can get so loud that some of their friends have mistaken the male insect�*s droning song for a police siren. mistaken the male insect's droning song for a police siren.— song for a police siren. because of my hearing — song for a police siren. because of my hearing disadvantages, - song for a police siren. because of my hearing disadvantages, i i song for a police siren. because of my hearing disadvantages, i don't| my hearing disadvantages, i don't put my hearing aids in when i come out into the garden, otherwise they get the whole sound magnified. the mass emergence and its timing is all part of a clever survival strategy to evade predators. and the metamorphosis from nymphs to adult happens relatively quickly. here metamorphosis from nymphs to adult happens relatively quickly.— happens relatively quickly. here we have a fully — happens relatively quickly. here we have a fully grown _ happens relatively quickly. here we have a fully grown female - happens relatively quickly. here we have a fully grown female but i happens relatively quickly. here we have a fully grown female but is i happens relatively quickly. here we l have a fully grown female but is now ready to mate and lay her eggs. she will only live for six weeks, though, after being underground for 17 years. this though, after being underground for 17 ears. . . , though, after being underground for 17 ears. , , , ., 17 years. this is when they are most vulnerable. — 17 years. this is when they are most vulnerable, right _ 17 years. this is when they are most vulnerable, right here, _ 17 years. this is when they are most vulnerable, right here, because i 17 years. this is when they are most vulnerable, right here, because the| vulnerable, right here, because the bodyis vulnerable, right here, because the body is so soft. it is a magical title entomologist doctorjessica welcome her 16—year—old daughter was not even alive last time saw these insects. the world was a very different place back then. george bush was president and facebook was just launched. you bush was president and facebook was just launched-—