Major Mitchell's Cockatoos nest in large hollows in trees such as River Red Gum, E. camaldulensis, Black Box, E. largiflorens, Coolibah, E. microtheca, or Callitris. The eggs are laid on a bed of decayed wood, woodchips and bark. Male and female will chew at a tree-hollow to enlarge it, and both will sit on the eggs while incubating them. Both male and female feed and preen the chicks.