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Thyreonotus corsicus is a species belonging to the family Tettigoniidae subfamily Tettigoniinae. It is found in the western Mediterranean from the Iberian Peninsula over the south of France to the southwestern Alps. Isolated populations are found in Corsica and Sardinia.
Shieldbacks have a substantial pronotum that looks like a shield.
They look like tiny armored tanks – rounded, plump, sturdy - but they are not as invulnerable as they appear and can be seriously injured if dropped. It might be a good idea to leave them where you find them (should you be fortunate enough to locate one) and simply watch what they do - including catching and eating other insects. I observed a Protean Shieldback about to grab and eat a male Japanese beetle that was in the process of mating!
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They live in woodland edges and shrubby meadows, and their shades of brown blend very well with bark, shrub stems, and dry leaves. These katydids are generally nocturnal and are predators on smaller insects. Although I seldom see or hear them, they seem to mature in the beginning of July.
Their song is an electrical buzzing reminiscent of a humming wire. Although non-native, they mature earlier than our native meadow katydids and don’t seem to be a problem. Listen for them in grassy meadows from later June into July.
