It has ceased to be. Sadly, Cell 3 at Pt. Mouillee SGA has dried up, forcing shorebirds to find wetter climes for their fall migration destination. The Humphries Unit is a good candidate; its drying, as well and is providing good habitat for shorebirds. Problem is, the habitat is spread out over a couple of miles of innaccessible marshland, so bad luck, photography!
I did find some Pectoral Sandpipers relatively close to shore at the extreme south end of the Humphries Unit (along the dike from Roberts Road parking). Lesser Yellowlegs, Semipalmated Sandpipers, and a couple of Short-billed Dowitchers were in view, as well.
A pair of Eastern Kingbirds were perched just a few feet away. They were juveniles looking for a handout from mom and dad.
Other notable sightings included a dozen Yellow Warblers flocking along the south end of Cell 3, and several Indigo Buntings along the bike trail.