dʒˈiːmˈɛlɪn bˈeɪst hɪz dᵻskɹˈɪpʃən ɔnðə "ɪpˈɜːviɚɹ æ ɡɹˈoʊz bˈɛk də keɪˈɛn" ðæt hɐdbɪn dᵻskɹˈaɪbd ænd ˈɪləstɹˌeɪɾᵻd ɪn wˈʌn θˈaʊzənd sˈɛvənhˈʌndɹɪd sˈɛvənti baɪ ðə fɹˈɛntʃ pˈɑːlɪmˌæθ kˈɑːnt də bˈʌfən ɪn hɪz mˈʌltaɪvˈɑːljuːm hˈɪstwɑːɹ nˌeɪtʃɚɹˈɛl dˈɛs ˈɔɪsoʊ .
Gmelin based his description on the "Épervier à gros bec de Cayenne" that had been described and illustrated in 1770 by the French polymath Comte de Buffon in his multi-volume Histoire Naturelle des Oiseaux .