What Actually Makes Water Roll Off a Duck's Back?
Season 7 Episode 14 | 4m 51s | Video has closed captioning.
Ducks and geese spend *a lot* of time preening their all-weather feathers. This obsessive grooming – and a little styling wax from a hidden spot on their back side – maintains the microscopic feather structure that keeps them warm and dry in frigid waters.
Problems Playing Video? | Closed Captioning