Mallards typically nest on the ground on dry land close to water, usually concealed under overhanging grass or other vegetation to provide cover

. They often choose sites near ponds, lakes, or wetlands but not right at the water's edge

. Their nests can be found in a variety of locations including:

• Under dense, low vegetation such as grasses, shrubs, or herbs

• Agricultural fields like alfalfa, winter wheat, barley, flax, and oats

• Under logs, woodpiles, or other woody cover

• In gardens or yards near water, sometimes even in urban areas

• Occasionally on floating mats of vegetation or woven into plant stems rising out of water

• Artificial structures like docks or nest boxes placed near water

Mallards do not usually nest in trees but may nest in holes at the base of trees or low forks

. Some nests have been found in unusual urban locations such as balconies or near building foundations

. The female Mallard creates a shallow bowl-shaped nest on the ground, lining it with grasses, leaves, twigs, and down feathers plucked from her breast to insulate and conceal the eggs

. In summary, Mallards nest mainly on the ground close to water, favoring concealed spots under vegetation or other cover, and can adapt to a wide range of natural and urban environments for nesting