I was in Mill Creek Marsh on Saturday and I came across both an Orange-Crowned Warbler and a Bobolink!
The Orange-Crowned Warbler was found at around 8:45 towards the very beginning of the trail, and the Bobolink was found flying around the general area of the first fork in the trail around noon. A good bird at the start, and at the finish!
Thanks, Patrick! Sorry for the delayed reporting — still catching up on e-mail during a hectic week.