European Mole Cricket

Gryllotalpa gryllotalpa is a remarkable burrowing cricket whose entire body has converged with the body plan of a mole — same digging legs, same compact burrowing body, same subterranean lifestyle, despite belonging to a totally different animal phylum. The males, however, do something no mole does: they dig precisely-shaped acoustic burrows that amplify their mating calls. The burrow has a Y-shaped entrance that converges into a single chamber where the male sits and stridulates. The chamber's geometry matches the wavelength of the male's song frequency, creating an underground 'horn' that broadcasts the call with extraordinary efficiency — calls audible up to 600 meters away. Acoustic engineers studied the burrow shape in the 1980s as a model for industrial-trumpet design. Females flying overhead pick up the calls and land near the singing male. The species lives across Europe and parts of western Asia. Their digging causes significant damage to lawns and turf, making them an agricultural and golf-course pest in much of their range.