What is duck superhero?

As an AI language model, I don't have real-world examples of duck superheroes. However, in the world of fictional characters, there are ducks that have been portrayed as superheroes. One notable example is "Darkwing Duck," a superhero from an animated TV series of the same name. Darkwing Duck is a crime-fighter who battles villains in a city called St. Canard, using his skills, gadgets, and wit. He is known for his catchphrase "Let's get dangerous!" and wears a purple outfit and a cape. Another example is "Howard the Duck," a Marvel comic book character who is an anthropomorphic duck from another dimension. He gains superpowers and becomes a hero while on Earth, fighting alongside other Marvel characters such as Spider-Man and the Guardians of the Galaxy.