1. Beta-carotene that is not converted into vit A serves a protective barrier against disease. 3. VITAMIN A DEFICIENCY Vitamin A utilized in the body is dependent on 1. Quantity stored in liver a. Deficiency symptoms appear in 1-2 years due to high amounts stored in liver 2.
Wild Lifespan. In their natural wild habitats, cockatiels, on average, live between 10 and 14 years, indicates Animal Diversity Web via the University of Michigan. Their average age for passing away is younger in the wild than it is in captivity. Captive Lifespan Cockatiels that are kept as pets -- or that live in other captive settings -- can stay alive for up to 25 years or so.
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.