Pterophylla camellifolia, the common true katydid, is a common North American insect. It can be found in southeastern Canada, through the eastern United States from Maine to Florida. P. camellifolia belongs to the family Tettigoniidae (katydids). Within the Tettigoniidae, it belongs to the subfamily Pseudophyllinae (true katydids). Other common names include northern true katydid and rough-winged katydid.

The loud, rasping, three-pulsed song, rendered "ka-ty-did", of the male of the nominate northern subspecies is the source of the vernacular name "katydid” as applied to any tettigoniid. It is a nearly flightless species that, in contrast with other katydids, often walks, runs, or hops rather than leaping or flying. It lives in the canopy of deciduous trees, where it feeds on the foliage. It can reach up to 50 mm (2 in) in length.

...