Tettigonia cantans is a species of bush crickets (or katydids) belonging to the family Tettigoniidae subfamily Tettigoniinae.

Tettigonia cantans inhabits moist to moderately dry and rather cool habitats such as fens, marshes, tall herb vegetation, mountain meadows, clearcuts and woodland edges.

But it is observed even in potato fields and on mountainous nutrient-poor, dry limestone grasslands with higher growing vegetation.

These grasshoppers hardly fly, their wings are shorter and wider than in the other Tettigonia species, only slightly covering the end of the abdomen.

They are active from noon until night and males are detectable by their characteristic and pleasant singing (hence the Latin name cantans).