lˈɔŋtˈɜːm stˈʌdiz bɪɡˈɪnɪŋ ɪn nˈaɪntiːnhˈʌndɹɪd ˈeɪɾi θɹˈiː hæv ɹᵻvˈiːld ðɪs spˈiːsiːz ɪz ɛkstɹˈiːmli lˈɔŋlˈɪvd: sˌʌm mˈɑːnɪɾɚd fɹˈɑːɡz ɹˈiːtʃ θˈɜːɾi fˈaɪv fˈoːɹɾi jˈɪɹz ˈoʊld, mˌeɪkɪŋ ðˌɛm ðə lˈɔŋɡɪstlˈɪvd wˈaɪld fɹˈɑːɡ ɪnðə wˈɜːld.
Long-term studies beginning in 1983 have revealed this species is extremely long-lived: some monitored frogs reach 35–40 years old, making them the longest-lived wild frog in the world.