New DNA vacuum method detects wildlife in Danish natural areas without direct observation

A new study by researchers at the University of Copenhagen demonstrates that a DNA vacuum method can detect local wildlife by capturing airborne environmental DNA—such as hair, feathers, and skin cells—from animals without requiring direct observation. The technique uses a simple plastic box with a computer fan to draw air through a filter, collecting DNA traces for analysis. In two studies, the method identified **52 bird species, 19 mammals, and 1 amphibian** across three Danish natural areas: Æbelø, Kalvebod Commons, and Lille Vildmose. In one study, Lille Vildmose alone yielded **54 bird species, 18 mammals, and 1 amphibian**, showcasing the method’s precision in diverse habitats. Researchers also found that the DNA signals reflected local wildlife, reducing the risk of false detections from distant species. This advancement brings the technique closer to practical use in biodiversity monitoring, conservation efforts, and early detection of invasive species. The team is now investigating how airborne DNA spreads over time and space to further refine the method’s reliability.