ɹˈɔɪ pˈiː. mˈækəl ˈɔːɡəst wˈʌn, nˈaɪntiːnhˈʌndɹɪd twˈɛnti fˈaɪv sɛptˈɛmbɚ θˈɜːtiːn, tˈuː θˈaʊzənd θˈɜːtiːn wʌzɐ jˌuːnɪvˈɜːsᵻɾi ʌv ʃᵻkˈɑːɡoʊ baɪˈɑːlədʒˌɪst bˈɛst nˈoʊn tə ðə dʒˈɛnɚɹəl pˈʌblɪk fɔːɹ hɪz ˈɪntɹɛst ɪn kɹˌɪptoʊzuːˈɑːlədʒi.
Roy P. Mackal (August 1, 1925 – September 13, 2013) was a University of Chicago biologist best known to the general public for his interest in cryptozoology.