Furthest distance you've seen bird fly across a river?

[Meadow Valley Man]

This was back in 1995 on the last morning of a hunt in northwest Alabama. The only bird I was hearing was across the Sipsey River.  There was a wide and steep valley between us, and since my time was limited, there was no way I could plot a course to him.  I had already taken a gobbler earlier in the hunt, so I decided to just sit and call, and enjoy hearing him gobble.  He gobbled to every call on this sunny, quiet morning. Then, there was silence.  All of a sudden, I heard a thump just below my position, and up pops a longboard.  I was so unprepared I blew the shot completely.  He flew back across the 400 yard wide valley.