Morphology of Euchontha showing the stridulatory organ on the male forewing of Euchontha frigida.

Males of E. frigida make a high frequency buzzing sound during flight, supposedly used for courtship. This sound is produced by a modified discal cell in the forewing, along with a corrugated region of the wing beyond the cell (see Miller, 2009).

Photographer: Miller, James. Publisher: Miller, James.