Great green macaws are the largest parrots in their natural range. They are mainly green in color and have a reddish forehead and pale blue lower back, rump and upper tail feathers. The 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. Juveniles have grey-colored eyes instead of black, are duller in color and have shorter tails which are tipped in yellow.
Habits and Lifestyle

Great green macaws are diurnal and social birds. They are usually seen in pairs or small groups of up to four to eight individuals, very rarely more. In Costa Rica, after the breeding season Great green macaws gather in flocks and migrate towards the coasts in search of food. In Costa Rica, these flocks usually consist of up to 18 birds. Great green macaws are arboreal; they rest and forage in the upper areas of the canopy. These are very noisy birds especially when in flight and their extremely loud, raucous "aak, raak" can be heard at great distances.

Great green macaws are found in Central and South America ranging from Honduras to western Ecuador. They live in dry tropical forests, evergreen rainforests, and in some areas prefer humid woodlands.

Diet and Nutrition

Great green macaws are herbivores (frugivores, granivores). They feed on seeds, nuts, and fruits, but also flowers, bulbs, roots, and bark.

Mating Habits

Great green macaws are monogamous and form strong pair bonds for life. Their breeding season starts in December and ends in June in Costa Rica, and from August to October in Ecuador. Pairs nest in cavities high up in the trunk, near the crown of the tree. The female lays a clutch of 2-3 eggs and incubates them for 26 days. Chicks hatch weighing 23g, can fly after 12-13 weeks, and are weaned after 18-20 weeks when they weigh over 900g. After fledging juveniles stay with the parents as a family unit for a significant amount of time, only separating gradually from them. Young birds, at least in captivity, become mature after 5 years, and start breeding after 6 or 7 years.
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