1. 天鹅   crow   ostrich   duck   swan   Hint Half-n-half Clue   2. 孔雀   peacock   duck   parrot   swan   Half-n-half Clue   3. 老鹰   chicken   vulture   eagle   quail   Half-n-half Clue   4. 鸭子   duck   flamingo   peacock   crow   Half-n-half Clue   5. 火鸡   turkey   swallow   duck   penguin   Half-n-half Clue   6. 燕子   swallow   chicken   eagle   pelican   Half-n-half Clue   7. 鹅   sparrow   goose   owl   chicken   Half-n-half Clue