In the movie On Golden Pond, the mailboat "MARIAH" was a raven. Here is a cool video of it running on Lake Hopatcong here in NJ in 2012 after being restored there by Katz Marina along with the "THAYER IV" from the movie.
http://www.youtube.com/watch?v=uhdp0N-irnQ
Both boats were found in all original but poor condition in a barn in Mass. in 2010.
Denis D