Yep. Know the movie and knew right away what you were getting at! I’ve thought about that line through the years. My father would take my brother and me up to Hawk Mountain in PA to watch the Autumnal flight of hawks back in 1965 and forward. Started a lifelong obsession with birds of prey. This year we have a pair of nesting red tails raising a young one in the side woods. I can hear him as I type this. My son,who was helping me build Stuff around the house during the pandemic, has caught the bug!
There are two books about Jeremiah. One was written by two historians and is called "Crow Killer ". The other is a book the movie was based on by Vardis Fisher called "Mountain Man". Both very good reads.