When your duck is incubating her eggs, she will be very quiet and you won’t even know that she is there. If, however, you go close to her and she notices you, she will scare you away with a warning sound.
A mother duck incubating her eggs is very aggressive and moves quickly when searching for food. She should make more irregular sounds and scare away other ducks. She aims to eat as much food as possible and return to her incubation spot.
Ducklings hatch from their eggs in about 28 days after laying. In 25-28 days of incubation, your mother duck will behave less aggressively when searching for food and might spend more time with her eggs.