YOU SAID:

The big bird ate the bird that ate the worm that ate the leaf

INTO JAPANESE

大きな鳥は葉を食べた虫を食べた鳥を食べました

BACK INTO ENGLISH

The big bird ate a bird that ate a leaf and ate a bug

INTO JAPANESE

大きな鳥は葉を食べて虫を食べた鳥を食べました

BACK INTO ENGLISH

The big bird ate the leaves and ate the insects

INTO JAPANESE

大きな鳥は葉を食べ、昆虫を食べました

BACK INTO ENGLISH

The big bird ate the leaves and ate the insects