A modern example showing this kind of dilemma is when our then-vice-president Dan Quayle accidentally spelled 'potato' as 'potatoe'.  Yep, that was an error, since the English spelling of that particular vegetable is now standardized as being without that 'e' at the end.  But it was pointed out that George Washington also spelled 'potato' as 'potatoe'!  So was Washington also in error?  No, he was not, since there was no standardized spelling of 'potato' at the time.

One might be able to argue that any translations of the Bible done after such a time as the Linnean classification became widely accepted is wrong for translating 'owph' as 'bird'.  However, such an argument would not apply to the original Hebrew or even to the King James Bible (my personal favorite), which was translated well before the existence of the Linnean system.  And it would still be a weak argument against more modern translations, since 'bird' technically is the best translation of 'owph', since 95% of the examples given in those passages do fall under the 'bird' category even under the Linnean system.  Perhaps 'winged flying thing' would be better, so if you want to petition new translators to use that phrase instead, be my guest.

So no error was made by the author of Leviticus.