here's emily fannon of our cbs affiliate wdjt in milwaukee. >> reporter: around mid-may cicada noiseill be in full swing. and while this high-pitched buzzing occurs every year throughout the midwest, experts say this year will be unique due to a rare emergence of cicadas that hasn't happened since the 1800s. >> we just had that solar eclipse recently. you only have so many opportunities in your life to see and witness something like that. and the cicadas are very similar. >> reporter: pj liesch is an extension entomologist at university of wisconsin, madison. he is also referred to as the wisconsin bug guy. >> these are the cicadas we'll be seeing emerge in large numbers this year. >> reporter: parts of southern wisconsin will experience these periodical cicadas, which only emerge every 13 or 17 years, a cycle scientists don't have a clear answer for. they're referred to as broods, and more than a dozen states will experience these two types of cicadas at the same time, which liesch says will create a much louder and at times annoying noise. >> you see a grove of trees behind us with

here's emily fannon of our cbs affiliate wdjt in milwaukee. >> reporter: around mid may cicada noised buzzing occurs every year throughout the midwest, experts say this year will be unique due to a rare emergence of cicadas that hasn't happened since the 1800s. >> we just had that solar eclipse recently. you only have so many opportunities in your life to see and witness something like that. and the cicadas are very similar. >> reporter: p.j.liesch is an extension entomologist at the university of wisconsin madison. he's also referred to as the wisconsin bug guy. >> these are the cicadas that we'll be seeing emerge in large numbers this year. >> reporter: parts of southern wisconsin will experience these periodical cicadas, which only emerge every 13 or 17 years, a cycle scientists don't have an answer to. they're referred to as broods and more than a dozen states will experience these two types of cicadas at the same time, which liesch says will create a much louder noise. >> you see a grove of trees behind us with singing cicadas. that would be in the range of 70 to 80 decibels whi