In general duck is an aquatic bird who loves to be in water but they can also fly. Ducks normally migrate between 200 and 4,000 feet in the air, but are capable of reaching far greater heights. A jet plane over Nevada once struck a Mallard (a species of duck) at an altitude of 21,000 feet which is equal to 3/4th height of Mt. Everest. This is currently the highest recorded flight of any duck
A duck can’t walk without bobbing its head. They do so to counterbalance their body.
If they won’t, it would be like humans walking without moving their hands.
– leading to cognizance : eustat