Environmental DNA (eDNA) refers to genetic material that organisms leave behind in their environment, such as soil, water, or air. This DNA can come from various sources, including skin cells, hair, feces, or even bodily fluids. Scientists collect eDNA samples to identify and monitor species in a given area without needing to capture or observe the organisms directly. The analysis of eDNA has become a valuable tool in fields like biodiversity conservation and ecology. It allows researchers to detect rare or elusive species, assess ecosystem health, and track changes in biodiversity over time. This non-invasive method is increasingly used for environmental assessments and wildlife management.