1. 羚羊   hippopotamus   stag   antelope   mare   Hint Half-n-half Clue   2. 針鼠   hedgehog   ox   otter   bat   Half-n-half Clue   3. 犀   bat   rhinoceros   polar bear   ox   Half-n-half Clue   4. 雄牛   dolphin   hippopotamus   mare   ox   Half-n-half Clue   5. 河馬   toad   octopus   hippopotamus   hedgehog   Half-n-half Clue   6. 雌ライオン   stag   toad   lioness   mare   Half-n-half Clue   7. 北極熊   antelope   dolphin   mare   polar bear   Half-n-half Clue