Why Are Those Ducks Eating the Lawn? Meet the American Wigeon
A short bill, a taste for grass and a winter journey connect the ducks beside a pond with a much bigger story.
Ducks on the water are familiar. Ducks spread across a lawn, heads down as if they were a flock of little geese, invite a second look.
If they are American Wigeons, the grass may be the meal. Understanding that one behavior changes how you read a pond: the bank and the water can both be part of the feeding ground. [1]
- Grass and aquatic plants both belong on a wigeon’s menu.
- A short, pale bill is a useful identification clue and a tool for grazing.
- Watch the whole scene: wigeons may feed beside coots, diving ducks and other waterbirds.
The lawn is part of the menu
American Wigeons eat plants from both land and water. Grass shoots are part of that diet, along with aquatic vegetation and seeds. A bird repeatedly lowering its bill into the turf may be plucking food, not simply passing through. [1]
Not every duck on a lawn is a wigeon, and wigeons are not strict vegetarians. They also eat insects and other invertebrates, especially during the breeding season. Behavior is a clue to follow, not an identification by itself. [1]
A small bill does useful work
Look at the pale bill of the bird in my photograph. It is noticeably shorter than the yellow bill of the male mallard behind it. The photograph was made in Huntington Beach on December 2, 2025; it illustrates the species rather than documenting a Coachella Valley sighting.
The wigeon’s short, goose-like bill helps it exert force at the tip and pluck vegetation. That connection between shape and behavior is more useful than memorizing a name alone: you can watch the tool doing its job. [4]
How to recognize the bird
Start with the compact shape, rounded head and short, pale gray-blue bill with a dark tip. On a male in breeding plumage, look for the pale crown and the green patch behind the eye. The green is a patch on a mottled head, rather than the mallard’s broadly green head. [2]
Females are subtler: a warm brown body, a gray-brown head and a dark area around the eye. Males outside breeding plumage can also look plainer. Lighting changes what the green patch looks like, so use several clues together. [2]
In this photograph, compare the foreground bird with the mallard behind it. Then check the crown and head pattern. Two birds sharing a pond do not necessarily share the same feeding style.
You can return to the American Wigeon field guide when you want a quick reference during a walk.
Watch what happens around coots
There is another reason to keep watching once you have identified a wigeon. On deeper water, it may associate with diving ducks or American Coots and take food they bring to the surface. It can get access to submerged plants without making the same dive. [3]
This is an invitation to observe a sequence. Which bird goes under? What comes back up? Does another bird move toward it? You might see feeding, competition, or simply two birds swimming past one another. Wait for the behavior before deciding what the scene means.
A winter visitor’s view of the desert
Southern California receives wintering wigeons, with southward migration building gradually and regional numbers often peaking in December or January. That is a seasonal pattern, not a promise of birds at a particular pond on a particular day. [3]
The larger connection is the Pacific Flyway. A neighborhood waterbird can belong to a much wider seasonal story. Use the Salton Sea birdwatching guide and Lake Cahuilla guide as starting points for local outings, while checking the birds actually present.
Listen before moving closer
The male’s call offers another clue: a high, nasal whistle, often in three parts. Females give different, rougher calls. Cornell’s recordings of American Wigeon calls let you hear the distinction. [5]
Wigeons can flush readily when disturbed. Watch from a distance that lets them continue what they were doing. [4] For photography, a feeding bird and a resting bird give you different stories; neither requires making the bird move.
That is the connection to birdwatching close to home. Return to one pond, learn a few shapes and calls, and give ordinary encounters enough time to become interesting.
Frequently asked questions
Why do American Wigeons eat grass?
Grass is part of their plant-rich diet. They feed on land as well as in water, using their short bill to pluck vegetation. [1]
Do wigeons dive for their food?
They usually feed at the surface or tip forward in shallow water. They may also take plants brought up by coots or diving ducks. [3]
How can I distinguish a wigeon from a mallard?
Check the shorter, pale bill, rounded head and overall plumage. A breeding male wigeon has a pale crown and green eye patch; females and nonbreeding males require a combination of clues. [2]
When should I look for wigeons in southern California?
Fall and winter are useful seasons. Regional numbers often build toward December or January, but local presence varies. [3]
Was the featured photograph taken in the Coachella Valley?
No. Mark Miller photographed this American Wigeon in Huntington Beach on December 2, 2025. The featured image is a horizontal crop of that photograph; selecting it opens the full portrait.
Sources and further reading
Research reviewed October 23, 2026. Species information is separate from local sighting evidence. The photograph was made in Huntington Beach; the diagrams are schematic.
- Cornell Lab of Ornithology — American Wigeon: Life History. Food, habitat and feeding behavior. Accessed October 23, 2026.
- Cornell Lab of Ornithology — American Wigeon: Identification. Bill shape, plumage and identification limits. Accessed October 23, 2026.
- Audubon — American Wigeon. Grazing, taking food from diving birds and southern California migration. Accessed October 23, 2026.
- Cornell Lab of Ornithology — American Wigeon: Overview. Bill function and observing from a distance. Accessed October 23, 2026.
- Cornell Lab of Ornithology — American Wigeon: Sounds. Male whistles and female calls. Accessed October 23, 2026.
