Whats the difference between a duck?!

Question: Whats the difference between a duck!?

Dont do any stupid answers or ask "and what" just answer the question!. it is a riddle!. Hint: look up the definition for duck!.Www@Enter-QA@Com

Answers:

One leg is both the same!.
But I also like: One has feathersWww@Enter-QA@Com

2 inches!?Www@Enter-QA@Com

One is intelligent, the other is a quack!Www@Enter-QA@Com

:DWww@Enter-QA@Com

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