Insects in the family Tettigoniidae are commonly called bush crickets (in the UK), katydids (in the USA), or long-horned grasshoppers (mostly obsolete). More than 6,400 species are known. Part of the suborder Ensifera, Tettigoniidae is the only family in the superfamily Tettigonioidea.

Primarily nocturnal in habit, with strident mating calls, many katydids exhibit mimicry and camouflage, commonly with shapes and colors similar to leaves.The lifespan of a katydid is about a year, with full adulthood usually developing very late. Females most typically lay their eggs at the end of summer beneath the soil or in plant stem holes. The eggs are typically oval-shaped and laid in rows on the host plant. The way their ovipositor is formed relates to its functional adaptability in the areas which it lays eggs.

The diet of tettigoniids includes leaves, flowers, bark, and seeds, but many species are exclusively predatory, feeding on other insects, snails, or even small vertebrates such as snakes and lizards. Some are also considered pests by commercial crop growers and are sprayed to limit growth, but population densities are usually low, so a large economic impact is rare.

Some species of bush crickets are consumed by people, like the nsenene (Ruspolia baileyi) in Uganda and neighbouring areas.

More Info: en.wikipedia.org