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They're Back, and they're Early!

Are you hearing a buzzing noise in the trees a bit early this year?

  • Our green annual cicadas usually emerge from their underground burrows in July, and are commonly called Dog-day cicadas, since they arrive in the hot and humid "dog days" of summer.
  • Although they weren't predicted to emerge this year, the different looking periodical cicadas, pictured above, have appeared in our area.
  • These periodical cicadas usually emerge every 17-years, en mass. The last emergence in northeastern Illinois was in 2007. Sometimes they emerge in off years, like this year, in smaller numbers.
  • Their distinctive colors and orange veined wings contrast sharply with the usual green cicadas.
  • For most of the 3,400 species of cicadas, the underground nymph stage lasts 2-5 years. But the periodical cicadas, in the genus Magicicicada, spend 13 to 17 years underground.
  • Although you may not see the green or darker colored adults, be on the look out for their exoskeletons with a split in the top. This is where the nymphs emerged as adults and then flew to the trees.
  • One sure way to know cicadas are around is the loud noise they make. Only males make the loud buzzing sound in an effort to attract a female. Each species has it's own sound.

To learn more about cicadas vist here.

 Newly emerged adult Periodical Cicada to the left and a nymph to the right

 

Adult Dog-day Cicada


Cicada exoskelton after the nymph emerged

 


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