If it swims and has feathers, people call it a duck. But grebes, coots, gallinules, and loons are all completely unrelated to ducks - and telling them apart is straightforward once you know where to look.
Quick Comparison
| Bird | Size | Bill | Feet | Key difference |
|---|---|---|---|---|
| American Coot | 33-43cm | White, chicken-like | Lobed toes | White bill and forehead shield. Bobs head while swimming. |
| Common Gallinule | 30-38cm | Red with yellow tip | Long, unwebbed | Red and yellow bill. White side stripe. Walks on lily pads. |
| Pied-billed Grebe | 30-38cm | Short, stout, banded | Lobed toes | Thick bill with black band. Sinks slowly instead of diving. |
| Red-necked Grebe | 40-50cm | Long, pointed | Lobed toes | Reddish neck in breeding. Longer neck than any duck. |
| Eared Grebe | 28-34cm | Thin, upturned | Lobed toes | Golden ear tufts in breeding. Red eyes. |
| Horned Grebe | 31-38cm | Short, straight | Lobed toes | Golden “horns” behind eyes in breeding. Black and rufous. |
| Western Grebe | 55-75cm | Long, yellow-green | Lobed toes | Black and white. Famous rushing courtship dance across water. |
| Common Loon | 66-91cm | Heavy, dagger-like | Webbed | Much larger. Checkerboard back. Haunting wail. Dives for fish. |
| Double-crested Cormorant | 70-90cm | Hooked tip | Webbed | Holds wings out to dry. Long hooked bill. Dives from surface. |
| Common Moorhen | 30-38cm | Red with yellow tip | Long, unwebbed | Nearly identical to gallinule. Red frontal shield. |
| Purple Gallinule | 26-37cm | Red with yellow tip | Extremely long toes | Bright purple-blue body. Walks on floating vegetation. |
The Feet Tell the Story
Ducks have flat, webbed feet. Grebes have lobed toes - each toe has its own paddle-shaped flap. Coots also have lobed toes. Gallinules have long, unwebbed toes for walking on vegetation. If you can see the feet, you can identify the bird.
Grebes vs Ducks
Grebes are the most common duck imposters. They sit on the water the same way, are roughly the same size, and share the same habitats. The differences:
- Bill - Grebes have thin, pointed bills. Ducks have flat, wide bills.
- Diving - Grebes dive frequently and for long periods. Dabbling ducks tip forward; only diving ducks submerge completely.
- Takeoff - Grebes need a long running start across the water. Many ducks launch straight up.
- Nest - Grebes build floating nests anchored to vegetation. Ducks nest on land.
Coots vs Ducks
The American Coot is the bird most often mistaken for a duck. It swims in the same ponds, flocks with ducks at parks, and accepts the same bread (which you should not feed to either). But coots are in the rail family, not the duck family. Their white bill, head-bobbing swim, and lobed toes give them away instantly.
The easiest way to tell ducks from imposters: look at the bill. Ducks have flat, wide bills built for filtering. Grebes, loons, and cormorants have pointed or hooked bills built for grabbing fish. Coots have short, chicken-like bills.
