Large Green Katydid (Tettigonia Viridissima)

A closeup of the large green Katydid (Tettigonia viridissima) in its early stage is showing that only after several moults do they become adults. Tettigoniids are ranging in size from as small as 5 mm to as large as 130 mm. The family name Tettigoniidae is deriving from the genus Tettigonia, of which the great green bush cricket is the type species. Katydids are hearing by using a structure called a tympanum, or tympanic organ, one of which is locating on each foreleg. This photo is taken in Brussels, Belgium, on July 28, 2024. (Photo by Jonathan Raa/NurPhoto via Getty Images)