In 2004, the International Union for Conservation of Nature (IUCN) reported stating that currently birds, mammals, and amphibians extinction rates were at minimum 48 times greater than natural extinction rates—possibly 1,024 times higher.
ɪn tˈuː θˈaʊzənd fˈoːɹ, ðɪ ˌɪntɚnˈæʃənəl jˈuːniən fɔːɹ kˌɑːnsɚvˈeɪʃən ʌv nˈeɪtʃɚ ˈɪʌkən ɹᵻpˈoːɹɾᵻd stˈeɪɾɪŋ ðæt kˈɜːɹəntli bˈɜːdz, mˈæməlz, ænd æmfˈɪbiənz ɛkstˈɪŋkʃən ɹˈeɪts wɜːɹ æt mˈɪnɪməm fˈoːɹɾi ˈeɪt tˈaɪmz ɡɹˈeɪɾɚ ðɐn nˈætʃɚɹəl ɛkstˈɪŋkʃən ɹˈeɪts—pˈɑːsᵻbli wˈʌn,zˈiəɹoʊ twˈɛnti fˈoːɹ tˈaɪmz hˈaɪɚ.