Top 8 Birds With The Largest Clutch Sizes

Large clutch sizes are characteristic of the Northern Hemisphere common eider. These ducks usually produce 3–7 eggs each clutch, although some have laid up to 9. Eiders nest colonially on islands and coasts.

Common Eider

Mallards, possibly the most famous duck species, are adaptable to many settings. Their clutches average 8–13 eggs. Mallards are abundant in urban ponds, wetlands, and farms.

Mallard

North American diving ducks include canvasbacks. Due to their amazing body size and attractive appearance, they are featured on this list despite their smaller clutch sizes of 5–9 eggs.

Canvasback

The American white pelican, a big waterbird with a pouch beneath its bill, produces 2–3 eggs per clutch. This may not look like a large clutch, but these birds reproduce cooperatively, with multiple adults caring for the young.  American White Pelicans stretch 8–9 feet (2.4–2.7 meters) across.

American White Pelican

House sparrows, ubiquitous in cities and suburbs, are adaptable and prolific breeders. House sparrows lay 2–8 eggs, which can be larger in food-rich locations.

House Sparrow

Another large-clutch bird is European starlings, brought to North America. They typically lay 3–7 eggs. Their rapid population expansion makes these birds invasive.  Medium-sized European Starlings measure 7–9 inches (18–23 centimeters).

European Starling

Brown-headed cowbirds are brood parasites that lay their eggs in bird nests. Due of their lack of parental care, they have enormous clutches. A female cowbird can lay 36 eggs in several host nests per breeding season.

Brown-headed Cowbird

American coots are North American waterbirds. They lay 8–12 eggs, which is considerable for a waterbird. Coots often fight over territory during breeding season. Pondweeds, sedges, and algae are American Coots' main diet.

American Coot

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