1. Alopex lagopus   giraffe   zebra   wolf   fox   Hint Half-n-half Clue   2. Bos taurus   leopard   zebra   camel   cow   Half-n-half Clue   3. Canis lupus   cat   whale   wolf   frog   Half-n-half Clue   4. Balaenoptera musculus   tiger   whale   giraffe   horse   Half-n-half Clue   5. Equus zebra   cow   leopard   wolf   zebra   Half-n-half Clue   6. Rana tigrina   frog   tiger   lion   leopard   Half-n-half Clue   7. Rattus rattus   rat   cat   frog   camel   Half-n-half Clue