In Florida, mottled ducks have lost 3.7 million acres of wetland habitat due to drainage for citrus orchards and improved pastures for cattle. In Texas and Louisiana, many of the wetlands have been depleted as a result of industrialization, urbanization, coastal erosion and drainage (approximately 102 to 150 sqaure kilometers are destroyed per year). Feral mallard ducks (which are kept as pets) mate with mottled ducks, which decreases the number of pure mottled ducks in the population. Mottled ducks also tend to breed with other species of ducks, which also decreases their genetic representation in the population. The effects of hunting are undetermined for this species.
Mottled ducks are protected under the US Migratory Bird Treaty Act.
US Migratory Bird Act: protected
US Federal List: no special status
CITES: no special status
IUCN Red List of Threatened Species: least concern