Studying endangered animal species without disturbing them and disrupting their natural habitat could be highly advantageous, as it would contribute to their protection and prevent unnecessary stress. Conventional methods for studying endangered species and their DNA, however, entail capturing animals for short periods of time, examining them and collecting tissues or other biological samples. These approaches often require significant resources and can be very stressful for animals. In the case of elusive species—animals that conceal themselves well and are thus very difficult to find or observe—it is also impractical.