"White rhino (Ceratotherum simum) are considered a conservation-dependent species and are classified as Near Threatened by the IUCN Red List of Threatened Species. Intense efforts have increased the population from fewer than 100 in 1895 to approximately 17,500 today.

Supporters of trophy hunting claim it is a viable method for “managing” the white rhino population. The practice also brings in tourism dollars and helps fund conservation efforts. Many others oppose the notion of trophy hunting, pointing out that killing an animal to get a thrill - and acquire a stuffed head for one’s wall - is not an acceptable “sport”."

Apparently his son Hill Perot got his trophy, "white rhino head".