Researchers conducted the first comprehensive survey of yeasts living in insect guts across Bulgarian national parks. Using DNA analysis, they discovered over 100 yeast strains, nearly half of which were previously unknown to science. The study reveals that insects are natural homes to diverse yeast species and serve as vectors for spreading yeasts in nature, some of which can cause human infections. This research highlights how much remains to be discovered about microorganisms in less-studied regions of the world.