The parrot seen in the palace during the spider dance sequence is a South American species. South America and the rest of the New World would not have been known to the people living during the Abbasid Caliphate for at least 300 or more years.
As Sinbad is rescued from the water by fishermen, he is seen with his head towards the front of the boat, but when the angle of the scene changes, his head is now towards the rear of the boat.