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Best Answer: Helena is 110% correct. I have chickens and rooster and even I was not sure so I went online. Average chicken/rooster lives 6-8yrs though they have been recorded to live as long as 15yrs. . . . . all like Helena says.
Hi! I too have heard various opinions about the lifespan of cockatiels. Most say that their *average* lifespan is about 15-20 years. I have several friends who have tiels that are over 25 and still very healthy. Cockatiels can live to be 35 or even older, and are very hardy, sweet birds. They live long lives for a creature so tiny, as most parrots do. Your sweetie may not be so young anymore, but hopefully, with lots of love and a good diet, hopefully he should still have some years left with you.