1. horse   Balaenoptera musculus   Canis lupus   Equus caballus   Rana tigrina   Hint Half-n-half Clue   2. man   Homo sapiens   Diceros bicornis   Camelus dromedarius   Alopex lagopus   Half-n-half Clue   3. cow   Canis lupus   Homo sapiens   Bos taurus   Panthera pardus   Half-n-half Clue   4. dog   Canis familiaris   Rattus rattus   Balaenoptera musculus   Alopex lagopus   Half-n-half Clue   5. rat   Panthera pardus   Canis familiaris   Elephas maximus   Rattus rattus   Half-n-half Clue   6. elephant   Equus caballus   Elephas maximus   Bos taurus   Panthera pardus   Half-n-half Clue   7. zebra   Felis domesticus   Equus zebra   Camelus dromedarius   Panthera pardus   Half-n-half Clue