YOU SAID:

I went to the animal fair, the birds and the beasts were there

INTO JAPANESE

動物フェアに行ったら鳥や獣がいました

BACK INTO ENGLISH

When I went to the animal fair, there were birds and animals.

INTO JAPANESE

動物フェアに行くと、鳥や動物がいました。

BACK INTO ENGLISH

When I went to the animal fair, there were birds and animals.