The Phaneropterinae, the sickle-bearing bush crickets or leaf katydids, are a subfamily of insects within the family Tettigoniidae.

[2] The name Phaneropterinae is based upon the Old World genus Phaneroptera (type species P. falcata), meaning "visible wing";[5] this refers to the exposed tips of the inner wings seen in many species, although some genera, notably in the tribes Barbitistini and Odonturini have become brachypterous.

Phaneropterinae are generally well-camouflaged with green and brown colors being most prevalent, but there are exceptions including certain Aganacris and Scaphura that are Batesian mimics of wasps.

[2] The vast majority of species live in shrubs and trees, feeding on leaves and twigs.

[2] Some species might potentially cause significant damage, though usually superficial, when present in large numbers, but this is rare; they usually are solitary, unlike meadow grasshoppers, so much so that they seldom come to human notice.

The Phaneropterinae differ from other subfamilies of Tettigoniidae (and other Orthoptera) in their oviposition; their eggs are rarely deposited in the earth, but are either glued in double rows to twigs, or are inserted in the edges of leaves.

[3] As of January 2024[update], Orthoptera Species File lists the following tribes, subtribes, genus groups, and genera.

: Brunner von Wattenwyl, 1878 – Americas, Iberian peninsula, Africa, Pacific islands Auth.

: Brunner von Wattenwyl, 1878 – Africa, Europe, Middle East, western Asia Auth.