Stilpnochlora couloniana is a species of phaneropterine katydid in the family Tettigoniidae, native to southeastern United States (Florida and Georgia; the only Steirodontini in the US), the Bahamas and Cuba.

[1][2][3][4][5] It is known as the giant katydid (a name also used for some other species) and it is the largest katydid in the United States,[1] with an average length of 6.6 cm (2.6 in) in adult males and 7.8 cm (3.1 in) in adult females.

[2] Individuals from Cuba tend to grow 5–10% larger than those from the United States.

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