Make sure it has a 4-inch x 3-inch elliptical entrance and is 10 to 30 feet above ... the wood duck population has rebounded in recent decades. Learn all about the common mallard duck.

Population counts showed good results for several species of ducks that nest in Minnesota, according to the results of the annual Department of Natural Resources spring waterfowl surveys.

Mallard counts were 63% below the Mid-Winter Survey long-term average, and total duck counts were 6% above the long-term average. Nearly 60% of the observed mallards were along the Red River from ...