Although there is only one animal of each type, they are referred to in the plural - Brian the lions and Rose the Elephants.
ɔːlðˈoʊ ðɛɹ ɪz ˈoʊnli wˈʌn ˈænɪməl ʌv ˈiːtʃ tˈaɪp, ðeɪ ɑːɹ ɹᵻfˈɜːd tʊ ɪnðə plˈʊɹɹəl bɹˈaɪən ðə lˈaɪənz ænd ɹˈoʊz ðɪ ˈɛlɪfənts.