The other tactic used by the waterboarding duck was to force other ducks to dabble by grabbing their throat and forcing their head under water. The duck would by nature try and feed and then once it had caught something, again the waterboarding duck would steal its food.
The behaviour of the waterboarding ducks alienated them from other waterfowl, who would always fly away, perhaps not surprisingly, when the waterboarding ducks came near. This behaviour led to many waterboarding ducks starving to death as they had lost their innate ability to find food for themselves.
This is an extract from the book Animals Evolution Avoided