Larvae and most aquatic adult amphibians excrete the nitrogen as ammonia in large quantities of dilute urine, while terrestrial species, with a greater need to conserve water, excrete the less toxic product urea.
lˈɑːɹviː ænd mˈoʊst əkwˈæɾɪk ɐdˈʌlt æmfˈɪbiənz ɛkskɹˈiːt ðə nˈaɪtɹədʒən æz æmˈoʊniə ɪn lˈɑːɹdʒ kwˈɔntᵻɾiz ʌv daɪlˈuːt jˈʊɹɹɪn, wˌaɪl tɚɹˈɛstɹɪəl spˈiːsiːz, wɪð ɐ ɡɹˈeɪɾɚ nˈiːd tə kənsˈɜːv wˈɔːɾɚ, ɛkskɹˈiːt ðə lˈɛs tˈɑːksɪk pɹˈɑːdʌkt juːɹˈiə.