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Cockatiels are picky when choosing a mate and form strong bonds that last for life. Breeding usually occurs following a heavy rain, when food will be plentiful for the chicks. During the rain, many of the birds will sit with their tails and wings outstretched to bathe.
However, it is always advisable to wait until your bird is 2 years old before you decide to mate it. Invariably, a female cockatiel will breed until she is 8 to 10 years old, while a male cockatiel stays fertile until he is around 12 years to 14 years of age.