Department of Natural Resources
From late September to early February, more than 100 experts in North American's Central and Mississippi Flyways rank the progress of mallard migration in their areas weekly to assess the progress of the birds’ migration. Staff from the Michigan Department of Natural Resources participates in this multi-flyway effort by gathering data for multiple areas of the state. The Missouri Department of Conservation then compiles data from each participating state to create a map showing the status of the mallard migration. This map is useful for hunters, birders, and others to view the progression of mallard migration throughout the fall.
These rankings do not directly depict mallard abundance, but instead indicate the relative progression of the fall migration. Annual variations in local wetland and environmental conditions may cause estimates to vary from previous years. The map shows mallard progress for the current year only, as a result, a dark color does not necessarily mean large numbers of mallards are present in that region. This map is designed to show broad geographic trends, and may not accurately represent localized conditions. There may also be some variation depending on the number of experts reporting for a given week.
•Natural Resources Conservation Service
•U.S. Fish and Wildlife Service
•Central Flyway Council
•Mississippi Flyway Council