Wigeons and Buffleheads forage at dusk in the southeast (lee) corner of Roberts Bay, high use habitat due to fine, detrital substrate and accumulation of Sea Lettuce and the Detritivores ( amphipods, shrimp and tanaids). At a precise time after Civil Twilight, Buffleheads depart for the offshore waters of Sidney Channel, where they roost over night. Feb 16th, 2015 19:02 PST

At low tide, the Sea Lettuce detrital zone is exposed, and Mallards dabble (sieve) the substrate and probably the same organisms as Buffleheads do throughout the day. In winter, Mallards and Green-winged Teals occupy this habitat during the night when it is exposed. Feb. 25th, 2015 16:24