There was an adult Little Blue Heron at Magee Marsh (Ottawa / Lucas counties, n.w. Ohio) this afternoon (Friday April 20). It apparently was seen by other people during the day; when I saw it about 5:30 p.m., it was west of the causeway in the marsh, just north of the first (southernmost) pullout on the east side of the road (or, the first major pullout that you come to as you drive north across the marsh toward the beach and boardwalk). An American Bittern was calling repeatedly in the same general area, but I didn't see it. At least one Barn Swallow and a couple of Northern Rough-winged Swallows were seen with the Tree Swallows in the same area. Large numbers of Blue-winged Teal and both Greater and Lesser Yellowlegs are present now.
Scanning the lake from the beach north of here, I saw at least a thousand Lesser Scaup but was unable to find any Greaters. A substantial minority of Greater Scaup accompanied the Lessers there as recently as a couple of weeks ago.