Cassini Periodical Cicada vs Window Gnat

Side-by-side species comparison

Attribute Cassini Periodical Cicada Window Gnat
Scientific Name Magicicada cassini Sylvicola fenestralis
Order Hemiptera Diptera
Family Cicadidae Anisopodidae
Size 24-28 mm 5-7 mm
Habitat Woodlands Underground
Diet Sap Feeders Sap Feeders
Regions Eastern United States, overlapping with other Magicicada species Europe
Conservation Least Concern Least Concern

Cassini Periodical Cicada

A 17-year periodical cicada distinguished from related species by its all-black underside and distinctive buzzing call. It often emerges alongside M. septendecim in the same broods.

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Did You Know?

Its call sounds like a rapid series of ticks followed by a buzz, distinctly different from the pharaoh-like drone of its sibling species.

Window Gnat

A small, delicate fly with dark-spotted wings often found resting on windows and walls. Larvae develop in fermenting organic matter and tree sap runs.

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Did You Know?

Despite being one of the most commonly encountered flies on windows throughout Europe, this species remains largely unstudied and overlooked by entomologists.