https://www.researchgate.net/publica...onda_Longevity
I still rely on real text. This is a good source for information regarding a variety of species.
https://press.princeton.edu/books/pa...s-of-the-world
Another recommended book. This one is a tougher read. It is very science based and the language used in the writing reflects that. Even if you are not familiar with the terminology throughout the book, I still think it is a valuable resource.
https://www.nhbs.com/biology-of-the-...d-pythons-book
Research on the internet is easy, but you have to dig a little for specifics. There are a great many hard copy resources available that are written by field biologists.
If you are strictly into web based searches, you will want to enter "field study" or "case study" in front of your search. If you don't, often times you'll be taken to general information or care sheet information advice.
There are a number of variables surrounding wild vs captive longevity.