What Do Mallards Eat?

Mallards are omnivorous ducks with diverse feeding habits. In water, they primarily eat aquatic plants, seeds, and small animals. They consume algae, pondweeds, and other submerged vegetation. On land, mallards eat seeds and grains from grasses and cultivated plants. They will peck seeds from dried plants or newly planted fields. Mallards also hunt small animals in water, including tadpoles, aquatic insects, and small fish like green sunfish and other minnows. They eat molluscs such as snails and freshwater mussels. Bivalves and other shellfish are important protein sources. In spring, mallards seek out young frogs and toads, including American toads and green frogs, to feed on as protein-rich food. Mallards also consume a wide variety of aquatic insect larvae. Crane fly larvae are a nutritious food source for mallards. They eat other aquatic insects as they find them while foraging. The exact diet depends on season and location, but mallards thrive because they eat whatever is available and abundant at any given time.

Mallard diets shift significantly through the year as food availability changes. In spring, mallards seek protein-rich foods to support breeding and egg production. They actively hunt small animals including tadpoles, emerging frogs, and other aquatic creatures. Female mallards require extra calories and protein before and during egg-laying season. Summer brings abundant insects and aquatic invertebrates. Mallards feed heavily on crane flies, mayflies, and other aquatic insects. Aquatic plants reach peak growth and seed production. Mallards eat seeds from water lilies and other aquatic vegetation. In fall, as temperatures cool, mallards focus on building fat reserves for migration. They consume seeds from grasses and cultivated grains if available. Acorns and nuts become important fall foods where they are found. Mallards in agricultural areas may feed on spilled grain and crop remnants. Winter food sources are limited, so mallards must work harder to find enough. They rely on open water areas where they can access aquatic plants and any available insects. Learn about mallard habitats in times of ice cover when they seek out springs and streams that remain unfrozen to access any available food.

Mallard diets vary across the United States based on available food sources. In coastal marshes and brackish water areas, mallards eat different organisms than inland freshwater mallards. Mallards in coastal areas consume more marine invertebrates and salt-tolerant plants. Inland mallards in Texas focus on freshwater vegetation and insects, accessing seeds from coastal prairie plants. Mallards in California have access to year-round vegetation and water in many areas, allowing diverse foraging. Mallards in Washington encounter temperate rainforest and coastal ecosystems with unique food sources. Mountain and high-elevation areas have shorter growing seasons, limiting food availability for part of the year. Mallards in these regions migrate to lower elevations where food is more accessible. Urban and suburban mallards often supplement their natural diet with bread and bird seed from humans, though this is nutritionally inferior. Mallards in agricultural regions have access to spilled grain and crop waste. Wetland and marsh areas provide the richest food sources for mallards. Diverse plant communities support varied insects and small animals that mallards consume. Learn more about California mallards and regional variations.

Mallards use distinctive feeding techniques to access different food sources. The most famous is dabbling, where mallards tip forward in shallow water to reach plants and food at the bottom. They submerge their heads and necks while their tails point upward. Dabbling allows them to reach food just below the surface without diving deeply. Mallards also up-end themselves to reach slightly deeper food. They walk on land and graze on grass and other terrestrial plants. On land, mallards peck at seeds and small items on the ground. They are surprisingly agile on land and will walk considerable distances from water to find food. Mallards also dive deeper when hunting for bottom-dwelling prey like molluscs and fish. They swim rapidly underwater using their wings for propulsion. Dabbling mallards often feed in pairs or small flocks, which may reduce predation risk. They feed most actively in early morning and late afternoon. During midday, mallards often rest and digest their food. Mallards are not aggressive foragers and will peacefully share feeding areas with other ducks. However, males can be territorial during breeding season.

Mallard ducklings are born ready to find their own food, unlike many other birds. Ducklings begin foraging within hours of hatching. They initially feed on tiny aquatic insects, mosquito larvae, and small aquatic crustaceans. Young ducklings require protein-rich food to grow rapidly. Aquatic insect larvae provide ideal nutrition for rapidly developing ducklings. Adults do not typically feed ducklings, though the mother stays with them for protection. Ducklings learn feeding techniques by observing their mother. Within a few weeks, ducklings can eat nearly any food that adults eat, though in smaller sizes. Young mallards eat seeds, vegetation, and small animals as they grow. By eight weeks old, ducklings are nearly independent and forage effectively. Vegetation becomes more important in the duckling diet as they grow. Ducklings eating mostly vegetation grow more slowly than those accessing abundant insects. By fall, juvenile mallards are nearly full-sized and eat a fully adult diet. Ducklings suffer high mortality from predation and starvation. Those with access to abundant aquatic insects and plants grow the fastest and survive best.

Mallards that live in parks, urban ponds, and around humans often have access to bread and other human food. While bread fills their stomachs, it provides little nutritional value. Mallards fed regularly by humans often become dependent and lose their ability to forage naturally. Do not feed mallards bread. Instead, if you want to support mallards, provide bird seed or specialized waterfowl pellets designed for ducks. Even better, protect natural wetland areas and let mallards forage naturally. Mallards in urban areas also scavenge human food scraps, popcorn, and other items from outdoor spaces. Pesticides and herbicides used on lawns and parks reduce the numbers of insects that mallards depend on. Protecting aquatic vegetation supports mallard populations better than feeding them. Do not throw plastic or other trash in duck habitats. Mallards may accidentally eat plastic pieces, causing internal injuries. Water pollution harms mallard food sources and can poison mallards directly. Maintain clean water for mallards to drink and bathe in. Visit Washington mallards to learn about regional conservation efforts.

Mallards differ from other North American duck species in their feeding flexibility. Wood ducks prefer acorns and seeds from trees, focusing on terrestrial plant foods more than mallards. Wood ducks also eat small aquatic animals when available. Pintails are dabbling ducks like mallards but prefer plants over animals. They consume more vegetation and fewer insects than mallards. Teals are smaller dabbling ducks that eat similar foods to mallards but focus more on tiny invertebrates and seeds. Diving ducks like canvasbacks feed differently than mallards. Divers submerge themselves and hunt deeper for food. Canvasbacks eat aquatic plants and invertebrates from deeper water that dabbling mallards cannot reach. Shovelers have specialized bills with fine filters designed for straining tiny food items. They feed on small crustaceans and other minute organisms in water. Geese are larger waterfowl that eat more vegetation and graze on land more than mallards. Mallards' versatility allows them to thrive in diverse habitats where other ducks might struggle. This dietary flexibility has made mallards one of the most successful duck species across North America and the world. Learn more about Texas mallards and regional waterfowl diversity.