Behavior/Health Concerns: Green-winged macaws require a higher fat content in their diet than parrots, so provide a healthy diet consisting of pellets, fresh fruits, vegetables, whole grains and the occasional nut. They are prolific chewers and can have overgrown beaks, so provide plenty of hard wood blocks and other hard toys to give their beaks a good work out. They are susceptible to papillomas, proventricular dilatation disease (PDD, also known as âœmacaw wastingâ� disease), polyomavirus, psittacosis and vitamin-A sensitivity. Green-winged macaws do not usually reach full size until about 1-and-a-half years of age. As babies, most macaws have dark eyes that lighten with age. Because green-winged macaws are sociable and live in large flocks in the wild, they need plenty of daily interaction with fellow flock members. These pet birds enjoy being part of the daily household routines.