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