Cockchafer soup
Cockchafer soup is a European dish made from the cockchafer insect. It was a delicacy in Germany and France until the mid-1900s. Its taste resembles crab soup. Cockchafers were once a common pest insect in Europe, with population explosions every four years, making it easy to collect enough cockchafers to make soup.
Excessive pesticide usage caused their populations to collapse by the 1970s, with complete extirpation in many areas. Because the beetles are now relatively rare, cockchafer soup has vanished almost entirely in communities where it was once commonplace.