Also known as Australian Blue hornets. However there are two main differences between true Blue Hornets and macaws. A true blue Hornets has a white or pale mouth and alternating colours on the skirt. Macaws can appear both blue or purple depending on conditions
Naming reference:
http://ultrazoa.co.uk/Purple-macaw
http://www.zoaaddict.co.uk/shop/4582337043/purple-macaw/8521129