A lime-green bush-cricket or katydid was sitting on a window for several hours in direct sun light. After a cooler late-summer night, they often seek out sun-exposed surfaces—like a window pane baking in the sun giving us a rare opportunity to see the underside of the abdomen. It is a female with the long, curved blade (ovipositor) at the rear used for placing eggs in soil or plant stems. Because she is on a smooth vertical glass surface, we get a clear look at the suction-like pads on her feet (called tarsi) that allow her to climb vertical walls effortlessly. They are active at night and are harmless to humans.
She is either a Bush Katydid (Genus Scudderia) native to North America or a Drumming Katydid / Oak Bush-Cricket (Meconema thalassinum), an introduced European species that is very common in Midwest regions.

Nikon Coolpix P950

Cropped