YOU SAID:

my birds are sky and fly

INTO JAPANESE

私の鳥は空で飛んでいる

BACK INTO ENGLISH

My bird is flying in the sky

INTO JAPANESE

私の鳥は空を飛んでいる

BACK INTO ENGLISH

My bird is flying

INTO JAPANESE

私の鳥が飛んでいます

BACK INTO ENGLISH

My bird is flying.

INTO JAPANESE

私の鳥は飛んでいる。

BACK INTO ENGLISH

My bird is flying.