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.
Best Answer: The potential lifespan of a cockatiel is 30 to 35 years. Sadly, the average lifespan is only 7 to 9 years. Poor nutrition, poor care, and accidents account for the majority of the untimely deaths. I have had a tiel live to be 30 before cancer took him from me and my current eldest is 27 years old.