JACKSONVILLE, Ill. — Nothing says summer like the chorus of cicadas. Those annual cicadas also signal the arrival of cicada killer wasps, one of Illinois’ largest and most misunderstood wasps. Despite their large, intimidating appearance, they are generally harmless. What do cicada killer wasps look like? Eastern cicada killers (Sphecius speciosus) are the largest wasps we have in Illinois, reaching 1.5 to 2 inches long. They have a reddish-brow…
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