1. Panthera pardus   lion   leopard   wolf   tiger   Hint Half-n-half Clue   2. Bos taurus   dog   cow   zebra   leopard   Half-n-half Clue   3. Elephas maximus   frog   elephant   lion   whale   Half-n-half Clue   4. Rattus rattus   tiger   rat   wolf   cow   Half-n-half Clue   5. Alopex lagopus   wolf   giraffe   zebra   fox   Half-n-half Clue   6. Felis domesticus   zebra   cat   elephant   camel   Half-n-half Clue   7. Canis lupus   cat   frog   wolf   whale   Half-n-half Clue