Cicada/sɪˈkeɪdə/ Definition 1 of 1Pro Tip 1/3Seasonal Appearance Cicadas are mostly heard and seen during specific seasons, like summer or spring. You'll notice cicada noises more as we approach June. Pro Tip 2/3Molting Process Cicadas shed their skin, and empty shells are often found on trees. Children collect the cicada shells left on the old oak tree. Pro Tip 3/3Unique Sound The sound cicadas make is a high-pitched buzz or clicking, not a chirp or a song. The cicada's buzz becomes the soundtrack of summer nights.