What do ducks eat? Ducks eat different foods, depending on their species and age, including: seeds, roots, stems of wetland plants, grains like barley from a farmer’s field, even midges and mayfly nymphs. Why not feed ducks bread? Feeding ducks bread increases the chances they may start to look to humans for handouts and spend less time foraging for their own food. Causing ducks to congregate can create an opportunity for disease to spread and worst of all increases the chances they will be injured by negative human/wildlife encounters. How do ducks know when to fly south? Ducks’ instinct kicks in to urge them to fly south when the amount of daylight, the weather conditions and difficulty in finding food combine to say it is time go. What do you call a group of ducks? Ducks in a cluster on the ground may be called a "sord", when in flight they are referred to as a "flock." Other terms for groups of ducks are, depending on the species, paddling, skiff, raft, team and dopping.