(Ara ambiguus)
Great green macaws are the largest parrots in their natural range,the second heaviest macaw species (although are relatively shorter tailed than other large macaws such as the red-and-green macaw and are thus somewhat shorter),and the third heaviest parrot species in the world.This species averages 85–90 cm (33.5–35.5 in) in length and 1.3 kg (2.9 lb) in weight.They are mainly green and have a reddish forehead and pale blue lower back,rump and upper tail feathers.Tail is brownish red tipped with very pale blue.The bare facial skin is patterned with lines of small dark feathers,which are reddish in older and female parrots. The great green macaw appears superficially similar to,and may easily be confused with the military macaw where their ranges overlap.