The Atlantic Coast Joint Venture is working with the Black Duck Joint Venture and Ducks Unlimited to develop energetic supply and demand curves to better define habitat goals for American Black Duck along the Atlantic Coast. They have developed spatially-explicit models of energy supply, currently thought to the major factor limiting wintering Black Duck populations, for the Mid-Atlantic and southern New England coasts. By combining information on individual metabolic requirements with migration chronology, they can estimate total non-breeding season demands. Initial results suggest that supply is barely meeting demands in southern New England and exceeds demand in the Mid-Atlantic region. The partnership is currently evaluating the model and incorporating competition for similar food resources by other waterfowl species. The results of these analyses will be used as part of a decision support tool to strategically guide conservation of American Black Duck.