For example, prior to 2003 there were three species of Dinornis recognised: South Island giant moa (D. robustus ), North Island giant moa (D. novaezealandiae) and slender moa (D. struthioides). However, DNA showed that all D. struthioides were in fact males, and all D. robustus  were females.
For example, prior to 2003 there existed three classifications of Dinornis: South Island giant moa (D. robustus ), North Island giant moa (D. novaezealandiae) and slender moa (D. struthioides). However, genetic evidence showed that all D. struthioides were actually male, while all D. robustus  were female.