dˈeɪvɪd ˈædɪsən hˈeɪɡ bˈɔːɹn twˈɛnti ˈeɪt dʒˈuːn nˈaɪntiːnhˈʌndɹɪd fˈɪfti ˈeɪt ɪz ɐn ɔːstɹˈeɪliən ˌɛvəlˈuːʃənˌɛɹi baɪˈɑːlədʒˌɪst, dʒɪnˈɛɾɪsˌɪst, ænd pɹəfˈɛsɚɹ ɪn hˈɑːɹvɚd jˌuːnɪvˈɜːsᵻɾiz dᵻpˈɑːɹtmənt ʌv ˌɔːɹɡɐnˈɪsmɪk ænd ˌɛvəlˈuːʃənˌɛɹi baɪˈɑːlədʒi.
David Addison Haig (born 28 June 1958) is an Australian evolutionary biologist, geneticist, and professor in Harvard University's Department of Organismic and Evolutionary Biology.