On April 26, 2010, Hefner donated the last $900,000 sought by a conservation group for a land purchase needed to stop the development of the vista of the Hollywood Sign. Sylvilagus palustris hefneri, an endangered subspecies of marsh rabbit, is named after him in honor of financial support that he provided.
On April 26, 2010, Hefner donated the last $90000,0 sought by a conservation group for a land purchase needed to stop the development of the vista of the Hollywood Sign. Sylvilagus palustris hefneri an endangered subspecies of marsh rabbit, is named after him in honor of financial support that, he provided.