Source checked 12 November 2026. PawLine editorial team. Not professionally reviewed.
Research-reading information, not veterinary advice or an individual prognosis. No countdown or remaining-years estimate. A present health concern needs an appropriate avian professional; do not wait for a worksheet or an app reply.
Start with the same species
A common label such as parrot covers many species. The studies report differences among species and groups. Before comparing two figures, check whether both actually refer to the same scientific or common-name scope. This reading guide does not identify a bird or resolve a disputed species label.
Then compare the statistic
A maximum, a median recorded lifespan and a modeled life expectancy need not agree. The historical paper and the newer comparative study do not all ask the same statistical question. A visible difference is a prompt to inspect the labels, not a reason to calculate their arithmetic average.
Record completeness matters
Young and colleagues describe uneven institutional record quality and incomplete histories when birds move into or out of the recording system. The later study addresses uncertainty through its modeling approach. A long spreadsheet or a precise-looking figure does not erase those limitations.
Keep an honest comparison open
If populations or methods remain unclear, the useful result is a specific question about comparability. The worksheet does not pick a winning source, rate a keeper's care or create a probability for a living bird. It arranges the reader's evidence and leaves the missing information visible.
Sources and limits
Young et al.: Survival on the ark, Animal Conservation (2012)
Smeele et al.: Coevolution of relative brain size and life expectancy in parrots (2022)