Nesting takes place between July and December, nests are constructed in tree cavities or cliff faces depending on the habitat (2). In the Pantanal region, 90% of nests are constructed in manduvi trees; existing holes are enlarged and then filled with sawdust (5). Clutches of 2 eggs are commonly laid, although only one chick will usually survive to maturity (5). The incubation period lasts about a month, and the male will tend to his mate whilst she incubates the eggs (5). Although fledging occurs when the chicks are around 3 months old they remain dependent on their parents until 6 months of age (5). The majority of the hyacinth macaw diet is comprised of nuts from native palms, such as acuri and bocaiuva palms (5). The acuri nut is so hard that the parrots cannot feed on it until it has passed through the digestive system of cattle (5).