The only dependable way, I think, is if the bird you shoot has been banded.
According to PA wild turkey biologist, Mary Jo Casalena, if wild turkeys survive their first year, their total lifetime will range from an additional 1 to 3 years - making any turkey living past 4 years an exceptionally old bird.
That being said PA biologists trapped a wild adult hen thought to be 1.5 years old back in 2012, with several others for a study and banded her leg.
Fast forward to this year and they were doing another study and captured the same hen, now 12.5 years old and they found her in good health, good enough that they were going to put a radio tracker on her for their new 4 year study! (she would be 16.5 if she made to the end)
I'm glad everybody got the gist of my original post.
