Mammals are a diverse class of animals, mostly terrestrial but some are aquatic and others have evolved flapping or gliding flight.
mˈæməlz ɑːɹ ɐ daɪvˈɜːs klˈæs ʌv ˈænɪməlz, mˈoʊstli tɚɹˈɛstɹɪəl bˌʌt sˌʌm ɑːɹ əkwˈæɾɪk ænd ˈʌðɚz hæv ɪvˈɑːlvd flˈæpɪŋ ɔːɹ ɡlˈaɪdɪŋ flˈaɪt.