Editing Tettigoniidae (section)

===Communication===
The males of tettigoniids have sound-producing [[organ (anatomy)|organs]] located on the hind angles of their front wings. In some species, females are also capable of stridulation. Females chirp in response to the shrill of the males. The males use this sound for courtship, which occurs late in the summer.<ref>{{cite book |title=Columbia Electronic Encyclopedia |page=1 |edition=6 |url=http://www.encyclopedia.com/topic/katydid.aspx |access-date=10 December 2014}}</ref> The sound is produced by rubbing two parts of their bodies together, called [[stridulation]]. In many cases this is done with the wings, but not exclusively. One body part bears a file or comb with ridges; the other has the plectrum, which runs over the ridges to produce a vibration.<ref>{{cite journal |last1=Robertson |first1=Laura |last2=Meyer |first2=John |title=Exploring Sound with Insects|journal=Science Scope|date=January 2010|volume=33 |issue=5|page=12 |url=https://www.highbeam.com/doc/1G1-216960409.html|archive-url=https://web.archive.org/web/20160504170619/https://www.highbeam.com/doc/1G1-216960409.html|url-status=dead|archive-date=2016-05-04}}</ref> For tettigoniids, the fore [[wings]] are used to sing. Tettigoniids produce continuous songs known as trills. The size of the insect, the spacing of the ridges, and the width of the scraper all influence what sound is made.<ref>{{cite book |last1=Chapman |first1=R. F. |title=The Insects: Structure and function |isbn=978-0521113892 |publisher=Cambridge University Press |edition=5|year=2013 }}</ref>

Many species stridulate at a tempo which is governed by ambient temperature, so that the number of chirps in a defined period of time can produce a fairly accurate temperature reading. For American katydids, the formula is generally given as the number of chirps in 15 seconds plus 37 to give the temperature in degrees Fahrenheit.<ref>{{cite web |url=https://www.loc.gov/rr/scitech/mysteries/cricket.html |publisher=U.S. Library of Congress |title=Can you tell the temperature by listening to the chirping of a cricket?}}</ref>