What do ducks eat? A duck’s diet mixes aquatic plants, insects, snails, seeds, and grains in the wild, and a combination of commercial feed, grains, and greens once you’re feeding them at home. Get the mix wrong and you’ll see it fast: soft eggshells, slow growth, ducklings that struggle to keep up. Get it right and your ducks stay productive and healthy for years. Here’s what to put in front of them at every age and every season.
What You’ll Learn
What Do Ducks Eat in the Wild
Wild ducks eat whatever their pond or wetland hands them that day. They dabble in shallow water and graze on land, sifting mud, sand, and grass with their beaks for anything edible. That opportunistic habit is why a wild duck’s diet looks so different from one week to the next.
Aquatic Plants and Algae
Ducks eat duckweed, water lilies, and pondweed straight out of lakes, rivers, and wetlands. These plants supply fiber and vitamins a duck can’t easily get elsewhere. Algae rounds out the plant side of their diet and adds nutrients that support overall health.
Insects and Small Aquatic Creatures
Protein matters most during breeding season and when raising ducklings. Ducks eat beetles, flies, and dragonflies, along with larvae, snails, worms, and crustaceans. That protein builds the muscle and feathers a growing duck needs.
Seeds and Grains
Ducks pick seeds and grains off land or floating on water. In farm country, wild ducks feed on leftover corn, wheat, or barley after harvest. Those energy-dense foods matter most during migration, when a duck needs extra fuel for long flights.
What Do Ducks Eat in Captivity
When raising ducks in a backyard or farm setting, feed them a diet that mimics what they’d find in the wild. A proper diet supports egg production, healthy growth, and disease prevention. Here’s what to put in front of them.
Commercial Duck Feed
Commercial duck feed gets you most of the way to a balanced diet in one bag. It’s formulated with the right balance of protein, carbohydrates, vitamins, and minerals for a duck’s needs. Ducklings need a starter feed with higher protein, then you move them to a grower or layer feed depending on whether you’re keeping them for eggs or as pets.
Grains and Vegetables
Supplement commercial feed with whole grains like oats, rice, or cracked corn. Ducks also eat chopped vegetables such as lettuce, kale, and peas. These additions diversify their diet and round out what the commercial feed alone provides.
Protein Sources
Backyard ducks need extra protein during molting or egg-laying. Offer mealworms, crickets, or small amounts of cooked eggs. Each of these is easy to source and gives ducks the protein they need for strong feathers and steady egg production.
What to Feed Ducks at the Park
Feeding ducks at the park is a favorite family outing, but not every food belongs in a duck’s bill. Bread is the traditional offering, and it’s also the worst one. Reach for something more nutritious instead.
Healthier Alternatives
Bring cracked corn, oats, or birdseed instead of bread. Chopped lettuce or spinach works too and is easy to carry in a bag. Scatter the food in small amounts so you don’t overfeed the ducks or draw in pests.
Why Bread Is a Problem
Bread fills a duck up without giving it much of anything it needs. A duck that fills up on bread day after day can end up malnourished even though it never looks hungry. Uneaten bread also fouls the water and draws in pests, which drags the whole pond ecosystem down with it.
Foods to Avoid
The wrong food does more than upset a duck’s stomach. Some of it causes real, lasting harm. Knowing what to keep away from your ducks matters as much as knowing what to feed them.
Processed Foods
Skip chips, candy, and anything salty or sugary. These foods upset a duck’s digestive system and cause health problems that build up over time.
Toxic Foods
Avocado contains persin, which harms birds. Onions and garlic cause anemia in ducks, and chocolate is toxic because of the theobromine in it. Keep all three out of reach entirely.
Spoiled or Moldy Food
Spoiled or moldy food causes fungal infections and digestive problems in ducks. Check every scrap you offer and skip anything that isn’t fresh and clean.
Seasonal Duck Feeding
A duck’s dietary needs shift with the seasons, whether it’s foraging wild or eating out of your feeder. Matching feed to the season keeps ducks in better condition year-round.
Spring and Summer
Warm months bring an abundance of insects, plants, and seeds for wild ducks. If you’re feeding backyard ducks, lean on protein-rich foods now to support breeding and molting. Wild ducks naturally eat more insects and aquatic creatures during this stretch too.
Fall and Winter
Cold months push ducks toward energy-rich grains and seeds that help them hold body heat. Increase access to these foods for backyard ducks while keeping the rest of their diet balanced. Wild ducks fall back on leftover crops or extra vegetation once insects thin out.
How Ducks Eat
A duck’s beak does most of the work. Dabbling ducks, like mallards, tip forward in shallow water and filter edible bits out with their bill. Diving ducks go under the surface entirely to find food.
Every duck’s beak has lamellae, comb-like ridges that strain food from mud and water in one motion. That single adaptation lets a duck eat efficiently in nearly any wet environment it finds itself in.
Feeding Ducklings
Ducklings grow fast, and their diet has to keep up. For the first few weeks, feed them a high-protein starter to build muscle and feathers. As they grow, their protein needs drop and they move onto a lower-protein grower feed.
You can introduce finely chopped greens like lettuce or dandelion leaves for variety. Hold off on grains or vegetable treats until they’re a few weeks old, since a duckling’s digestive system is still developing at that age.
The Role of Water in a Duck’s Diet
A duck needs water every time it eats, not just when it’s thirsty. Water helps a duck swallow and digest its food, and without it ducks can choke or run into other digestive trouble. Wild ducks have ponds and rivers on hand. For your backyard ducks, a shallow dish of fresh water works fine, as long as it’s deep enough for them to dip their heads and clean their bills and eyes.
A duck’s diet drives everything else about how it grows and lays. Get the feed right at every stage and you’ll see it in when your ducks start laying eggs and how long they stay productive. For a science-based look at waterfowl feeding habits in the wild, Ducks Unlimited’s waterfowl research is worth a look. Feed them well, keep clean water in front of them at all times, and skip the bread bag next time you’re at the park.
Frequently Asked Questions About What Do Ducks Eat
Can ducks eat bread at all?
A small piece now and then won’t hurt a healthy adult duck, but bread offers almost no nutrition and fills a duck up without feeding it. Stick to cracked corn, oats, or chopped greens instead, especially if you’re feeding ducks regularly.
What do baby ducks eat first?
Ducklings start on a high-protein starter feed for their first few weeks. That protein builds the muscle and feathers they need before they transition to a lower-protein grower feed.
Can chickens and ducks eat the same food?
Chickens and ducks can share most grains, greens, and commercial feed, though ducks need more niacin and should never eat medicated chick starter, which can harm their kidneys. See our full breakdown on whether chickens and ducks can eat the same things for the details.
Do ducks need grit to digest their food?
Yes. Ducks lack teeth, so they swallow small pieces of grit that sit in their gizzard and grind up tougher foods like grains and seeds. Offer insoluble grit free-choice alongside their regular feed.
How much should I feed my backyard ducks each day?
An adult duck eats roughly a quarter to half a pound of feed a day, split between morning and evening. Adjust up during molting or egg-laying, when their protein needs climb.
