Swan
The symbol of pure love, perfection, and grace is actually quite brawny and strong. This bird usually weighs in at about 28 lbs, with a wingspan up to 8 ft.
Swans can be dangerous to humans if they get close to their nest. When attacking, these birds hiss, run at their potential enemy, and beat them with their wings.
In the best case, the foe will get a slight shock, in the worst case, they will get a couple of serious bruises. There have also been cases where swans turned over small boats with people in them.