YOU SAID:

i have a yellow and blue bird

INTO JAPANESE

私は黄色と青の鳥を持っている

BACK INTO ENGLISH

I have yellow and blue birds

INTO JAPANESE

私は黄色と青の鳥を持っています

BACK INTO ENGLISH

I have yellow and blue birds.

INTO JAPANESE

私には黄色と青の鳥がいます。

BACK INTO ENGLISH

I have yellow and blue birds.