YOU SAID:

it's cause im the biggest bird

INTO JAPANESE

それは私が一番大きな鳥だからです

BACK INTO ENGLISH

because i am the biggest bird

INTO JAPANESE

私は一番大きな鳥だから

BACK INTO ENGLISH

I'm the biggest bird

INTO JAPANESE

私は一番大きな鳥です

BACK INTO ENGLISH

i am the biggest bird

INTO JAPANESE

私は一番大きな鳥です

BACK INTO ENGLISH

i am the biggest bird