The European rabbit is both a pest and a promoter of the ecosystem. In many areas where the European rabbit is an invasive species, it is often considered a pest, such as in Australia. In its native country of southern France and the Iberian Peninsula, this rabbit is very important to the well-being of natural wildlife, therefore populations must be preserved and enhanced.CK Williams, CC Davey, RJ Moore , LA Hinds, LE Silverset, PJ Kerr et al (2007) conducted research aimed at maintaining ever-increasing rabbit populations in Australia through research into the sterility of female rabbits using viral vector immunocontraception. This study found that sterility decreased the number of fleas found on adult females and some adult males. Sterility has also been found to increase the lifespan of adult rabbits. However, sterility has not contributed to reducing the size of the European rabbit population in Australia. Therefore, until more successful research is carried out, the European rabbit will continue to be a nuisance in Australia, as complete eradication of the population could be very detrimental to wildlife that have become accustomed to the presence rabbits in its ecosystem. Many researchers, including Alexander C. Lees, Francisco Palomares, Zulima Tablado, Miguel Delibes Mateos, Damien A. Fordham, and many others have conducted extensive research on the conservation of European rabbit populations. These researchers found that factors such as viral disease, heavy hunting, and habitat destruction contributed significantly to the decline and lack of improvement in rabbit populations. They concluded that habitat regulations and hunting regulations reducing hunting during the breeding season will effectively help i...... middle of article ......tral Ecology, 37, 945 -955.Lees, AC, & Bell, DJ (2008). A conservation paradox for the 21st century: the European wild rabbit Oryctolagus cuniculus, an invasive alien species and an endangered native species. Mammal Review, 38, 304-312. Palomares, F., Delibes, M., Revilla, E., Calzada, J. and Fedriani, JM (2001). WILDLIFE MONOGRAPHS: SPATIAL ECOLOGY OF THE IBERIAN LYNX AND ABUNDANCE OF EUROPEAN RABBITS IN SOUTH-WESTERN SPAIN. The Journal of Wildlife Management, 65, 3-30. Tablado, Z., Revilla, E., Palomares, F. (2009). Reproducing like rabbits: global patterns of variability and determinants of European wild rabbit reproduction. Ecography, 32, 314. Williams, CK, Davey, CC, Moore, RJ, Hinds, LA, Silvers, LE, Kerr, PJ, ... Krebs, CJ (2007). Population responses to sterility imposed on European rabbits. Journal of Applied Ecology, 44, 291-298.