I went back to the trail later in the afternoon to see if the Merlin might still be there for some better photos. I didn't find the Merlin, but added four more species to today's trail list to raise the total to 30 species: Great Blue Heron, Red-bellied Woodpecker, a small flock of Eastern Meadowlarks, and a large flock of Cedar Waxwings that took off when I played a Merlin recording.
Swamp Sparrow
Palm Warbler
Eastern Meadowlark
Eastern Meadowlark
Great Blue Heron
Cedar Waxwings