the biosphere are listed as cameroon , zimbabwe , chad and ghana which produces yams , oil palms , coffee , teff , finger millet , peas , lentil , cotton , watermelon , gourds , wild animal population of goats , oxen and cattle , sorghum and rice and gold and copper in the mines and spices and no lions , elephants , tigers or hyenas and cheetahs , deer , camels and giraffes , apes and monkeys .