Canon L-1 and A-1 Hi-8 camcorders--Sony ED-Beta camcorder---Featuring Canada Geese and Whistling Tundra Swans, this was shot in 1990, with a few segments from 1993. If you listen closely at the 11:15 time point in the video, you can hear the voice of a Trumpeter Swan flying with the Tundra Swans. I think it is probably the slightly-larger bird on the right of a group of five.
I used a shoulder-mount steadying rig I had made and two Sony Z-200 shotgun mikes. Many of the scenes were shot near sunset and some as much as an hour afterward. It was edited into MP4 at 8 Mbps. It will play with higher quality if the full uploaded video file is downloaded.