If it looks like a duck, walks like a duck and quacks like a duck, it’s probably a duck.
But it might also be a robotic assassin overlord cleverly designed to look like a duck, but with the sinister purpose of enslaving all the humans on the planet and killing those who won’t submit to their domination.
Or it could be a shape-shifting extraterrestrial life form which has chosen ducks as a nicely harmless animal to mimic while they study our ways with the overall plan to conquer and subdue us while they plunder our planet’s natural resources and leave us to waste away once their pillaging is complete.
But it’s probably a duck. Just a duck.