Pictured here are Stargazer lilies from our garden; I love their perfume. Sitting at our dining room table admiring the flowers, I hear the cicadas in the yard, singing their song. The Wisconsin Department of Natural Resources (DNR) page on cicadas says that the bugs are humming to attract a mate.
Charles Fonaas, author of the DNR article linked above, wrote: "If the robin is to many the harbinger (messenger) of spring, then the cicada is perhaps an advance scout for autumn warning all who hear it to 'enjoy the summer while you can for the end is near.'" On that advice, get outside if you can and enjoy a happy, summer day!