I don't normally like to just post links to things without adding some substantive commentary of my own (although I did do that some in the early days of the blog). But I can't help sharing a fascinating site that I came across a few days ago. (I found it fascinating; other people might not.) It presents the maximum recorded lifespans for all species of North American birds, as derived from bird banding data.
Say, for example, that you are wondering how long a Barred Owl (Strix varia) can live. Simply go to the site, select the species, and find that a Barred Owl was recorded to have lived an astounding 24 years.