Entomologists Ed Riley and Bart Drees say the past few years have dimmed the lights of the flashy insects, once seen almost nightly throughout the state during spring and summer months. ?There?s no doubt the severe drought the past few years has affected them,? confirms Drees, who is a Texas AgriLife Extension Service entomologist. ?The lack of water has to be one big reason why you don?t see as many as in years past.? ?Most insects need a certain level of moisture in their environment, so the drought can play a big role in their numbers,? adds Riley, a curator for the entomology department with a joint appointment with Texas AgriLife Research. ?Another reason is urbanization ? most insects need natural settings in which to live such as woods, meadows and creeks. In places where you have a lot of homes and concrete, you will find fewer insects, and lightning bugs certainly fall into that category.?