I'm for the Hippopotamus

Two brothers (they may not look alike but have the same mother) are at odds on how to make a living in apartheid South Africa. Tom (Bud Spencer) runs a safari outfit while Slim (Terence Hill) tries to sabotage it due to his fondness for wildlife. Tom's guns are loaded with blanks however as he has a soft spot in his heart and loves animals as much as his brother. Both brothers join together, grudgingly of course, to rid their province of a sadistic German tyrant who is trying to run everyone off their land. This person, a former boxer named Ormond, has planned two things; to get as much as land possible and to gather as many animals as possible to sell to zoos. (official distributor synopsis)