This is an Unreleased Item, found in Game Files. It may be released at any time.
The Duck 1 is an unreleased Mob found in the game files.
How this mob would behave is unknown, as it has not been released.
It is possible that one day this sprite will be used as the sprite for the Duck.
Duck 1 and Chicken 1 were found in the game files and were named "Duck" and "Chicken" respectively by the fans. However, Sidney deVries psyched everyone out by adding an Animal named "Duck" to the game, though the animal had the Chicken sprite. To this day, it is unknown what will become of the Duck Sprite.