 There are about 110,000 Brahman bulls above the Tropic of Capricorn, that is, about 70% of bulls in that region.Wairuna stud played a major role in the early era of Brahman cattle breeding.ABBA claims that "[o]ver the years probably every stud and station herd has had bulls and or females from Wairuna, Wetherby, Burnside, Dundee and the Orient [that] have left their mark on future generations of Brahman cattle.