1. Camelus dromedarius   tiger   elephant   frog   camel   Hint Half-n-half Clue   2. Balaenoptera musculus   lion   frog   whale   zebra   Half-n-half Clue   3. Felis domesticus   cat   lion   whale   rhinoceros   Half-n-half Clue   4. Rattus rattus   rat   whale   cow   zebra   Half-n-half Clue   5. Bos taurus   cat   giraffe   cow   tiger   Half-n-half Clue   6. Homo sapiens   lion   man   dog   cow   Half-n-half Clue   7. Panthera pardus   wolf   leopard   tiger   lion   Half-n-half Clue