At many locations managed to provide habitat for waterbirds, managers recognize that maximizing benefits for one group of birds may not necessarily maximize them for another. In fact, without careful planning, efforts undertaken for one group of birds may negatively impact habitat use by another. Part of the reason IWMM focused on waterfowl and shorebirds as two of the three focal guilds was due to the recognition that efforts undertaken for waterfowl were often not optimum for supporting shorebirds. For instance, timing of actions like flood ups and draw-downs is crucial but different for successfully attracting use by these guilds. By providing waterbird count and habitat use data for each of these guilds during migration and winter, the IWMM monitoring protocol can help inform decisions about how best to manage a unit given tradeoffs for these guilds. This is the approach currently being implemented at Mattamuskeet National Wildlife Refuge, where IWMM developed local-scale decision support to aid managers in their efforts to maximize benefits for both waterfowl and shorebirds.