YOU SAID:

I think that bird over there is quite suspicious

INTO JAPANESE

あそこにいる鳥はかなり怪しいと思う

BACK INTO ENGLISH

I think the bird over there is pretty suspicious.

INTO JAPANESE

あそこにいる鳥はかなり怪しいと思います。

BACK INTO ENGLISH

I think the birds over there are pretty suspicious.

INTO JAPANESE

そこにいる鳥はかなり怪しいと思います。

BACK INTO ENGLISH

I think the birds there are pretty suspicious.

INTO JAPANESE

そこにいる鳥はかなり怪しいと思います。

BACK INTO ENGLISH

I think the birds there are pretty suspicious.