YOU SAID:
Duck are are is a are bird
INTO JAPANESE
鴨がいるは、鳥
BACK INTO ENGLISH
Duck is a bird
INTO JAPANESE
アヒルは鳥
BACK INTO ENGLISH
Ducks birds
INTO JAPANESE
アヒルの鳥
BACK INTO ENGLISH
Duck birds
INTO JAPANESE
バード
BACK INTO ENGLISH
Bird
INTO JAPANESE
鳥
BACK INTO ENGLISH
Bird
That didn't even make that much sense in English.