Currently, the role of laboratory diagnostics is increasing as a source of information that makes it possible to assess the state of biological material in a certain period of time. A large number of works are devoted to the laboratory study of cadaveric blood and the comparison of its indicators with those of living blood in the forensic medical literature. Sampling biomaterial from wild animals in nature is difficult. Foreign researchers take biomaterial by immobilizing animals with drugs, which in turn can affect the results of work. Taking biomaterial from wild animals harvested by shooting in order to carry out research seems to be the simplest and most realistic way. The death of an animal from a gunshot wound occurs instantly or, in most cases, the agonal period does not exceed several minutes, which corresponds to the lightning-fast onset of death. There are practically no changes in organs and tissues. The morphological, biochemical, immunological and hormonal studies of blood serum from wild animals, taken by the shooting method, carried out by us, have shown their effectiveness. Taking into account our practical experience and literature data, we recommend to use the method for taking and storing biomaterial, which will fully ensure the comprehensive completeness of the study. It seems possible to obtain scientific data on the physiological parameters harvested of wild animals and to compare these research results with those from live animals.