Most of the cricket photos I have are of singing crickets, but here is a picture of a Narrow-winged Tree Cricket (Oecanthus niveus) at rest. Here is a link to a website with some information about crickets and a recording of a calling Narrow-winged Tree Cricket and here is another tree cricket website.
The Narrow-winged tree crickets seem to prefer singing with their wings aligned in the gap between the edges of two leaves.
This unusual position is no accident. The crickets are using the leaves to amplify their songs.
This is accomplished by using the leaves as an acoustical baffle. As the cricket's wings vibrate they produce sound waves off the front and the backsides of the wings (dipole sound source). The leaf baffle helps prevent the front sound waves from interfering with the back waves (destructive interference) which avoids cancellation of some of the precious volume of sound these small creatures can produce.
These little acoustical engineers, the tree crickets, also like to sing through a hole in a leaf.
The many leaflets on the walnut trees provide exactly what the crickets need for their sound system. Perhaps for that reason, I have found few tree crickets on the other trees and bushes in our fencerow. Another possibility is the fact that the walnut's low branches overhang the driveway where I can conveniently observe the tree cricket's nightly performances.
Notice the contortions the tree cricket puts itself through while calling... in order to position itself the most advantageously with its chosen sound baffle.
... each cricket call is an extraordinary song.Those songs are calls for mates, but they call me as well. A cricket's song calls me to search for the singer in hopes of witnessing an outstanding performance of acoustical ingenuity.
I think knowing the crickets and their trills is a thrill.