They are usually seen on the ground or outermost branches of a tree or shrub. In the north, they congregate in large flocks consisting of up to several hundred birds. Throughout the day these birds undertake long flights from roosts to feeding grounds or water. The Cockatiels strangest habit is perching lengthwise along a stout limb of a dead tree. This habit is baffling to all who study Cockatiels.
Cockatiels eat a variety of foods.
They mainly eat seeds, fruits, berries, plants, and insects. They are known to raid crops and always forage on the ground, especially for seeds. Breeding is variable and dependent on rain. The Cockatiel breeding season usually last from August to December, although breeding can occur anytime of the year after rainfall. Nests are usually found in hollow limbs or tree holes, preferably in large hollow eucalyptus near water.