French cooks are in hot water for contributing to the decline of Sweden's ortolan bunting population. The rare birds are turning up on plates in southern France, according to a Nordic scientific journal.It is estimated that Sweden's ortolan bunting population has dropped by 15 percent in the last decade. Around 7,000 pairs of birds are currently believed to nest in the Scandinavian country. The majority of Swedish ortolan buntings pass by the resort of Les Landes in south west France before heading on to Africa.