1. 杜鹃   turkey   cuckoo   chicken   owl   Hint Half-n-half Clue   2. 雕   sparrow   stork   vulture   duck   Half-n-half Clue   3. 鹅   goose   swallow   chicken   eagle   Half-n-half Clue   4. 鹦鹉   swallow   parrot   seagull   quail   Half-n-half Clue   5. 燕子   swallow   seagull   quail   vulture   Half-n-half Clue   6. 乌鸦   pelican   eagle   crow   penguin   Half-n-half Clue   7. 天鹅   swan   cuckoo   crow   turkey   Half-n-half Clue