Warning! Do Not Watch This Video … … if you’re dying for duck season to open. Delta Waterfowl will not be held responsible for what may happen to your heart rate if you watch this preview of our upcoming 2020 Migration Updates. Delta’s coast-to-coast coverage of the wheres, whens and hows of the waterfowl migration is coming soon, brought to you by Kent Cartridge. We never stop following the fall flight … why should you? So, where will you open the 2020 waterfowl season?