Unrestriced hunting and poor wildlife management has clearly led to the substantial reduction in numbers and species of animals. However, when hunting is properly managed in balance with nature, hunting effectively conserves wildlife habitat and species. Hunting generates vital income for conservation, for example from hunting license and excise tax revenues. Such income supports the maintenance of natural habitat to maintain a wild animal population (that without hunting revenues may not survive). Regulated hunting or culling also keep animal numbers from increasing above the carrying capacity of the land, that otherwise would lead to the natural starvation and death of numerous animals.
Through license revenues, excise taxes and other sources of income such as duck stamps, USA huntsmen contribute over 1 billion dollars to wildlife conservation efforts each year. A further 300 million dollars are contributed each year through private donations. Their support over the years has contributed in significant measure to the increases in the following wild animal numbers in the USA: about half a million white tailed deer in 1900 to about 18 million today; about 100,000 wild turkey the early 1900s to about 4.5 million today; about 12,000 pronghorn antelope 50 years ago to more than one million.