These develop in gently sloping valleys or hollows. These undulations give the hollows and peaks of altitude. Many live in cracks, hollows and burrows and hardly move at all. They roost in a variety of places, including buildings, caves, tree hollows, and foliage. Holes in cliffs and banks, or tree hollows, are also used. Nesting takes place in large vertical tree hollows of tall trees. They spend the day in tree hollows or leaf nests. Sholas cover the hollows of its slopes. Tree hollows and woodpecker holes are also used. This species fed on insects and roosted in tree hollows and decaying vegetation. Dissolution pitting dissolves hollows in the limestone. Dens in tree hollows usually contain enough sawdust to make lining unnecessary. Cockatoos are monogamous and nest in tree hollows. Fullers are forming tools of different shapes used in making grooves or hollows. She has sharpened and elongated canine teeth with hollows inside them.