Diet composition affected and number of eggs laid, number of fertile eggs per clutch, initial egg mass, and number of fledglings raised per clutch. Protein, calcium and phosphorus content affect egg and chick development.
Vitamins are essential for egg fertility and chick growth.
The other species often occured in pairs or family groups. The reproductive ecology of the Great Green Macaw Ara ambigua was studied in the Bosque Protector Cerro Blanco and adjacent areas situated in southwest Ecuador. Between 10 July 1997-30 June 1998 the species was monitored over an area of c. 4,500 ha. discovering one nest. Daily nest observations provided new information on the species diet. From 26 July-19 November 1997, the consumption of two orchid spp.