Why isn't the accusative kuşları acceptable?
The accusative case is only for direct objects and a few time expressions. It is never for subjects.
Oh, okay, thanks a bunch!
Why wouldn't okumak conjugate to 3pp okurlar?
That is done for actions taken by humans, however you could do that above and it wouldn't be technically wrong. It should be accepted as one of the alternative translations.
When writing a thesis would you use our or okurlar?
It is an accepted solution now.
So it's the same to put okur or okurlar although the subject is in plural
Why okur instead of okular