Before starting to prep for the next day's surveys, Heidi, Jack, & I all agreed that our hunger from our respective long days was in need of fixing (it was 3pm, after all) and we settled on a nearby Subway as a fast but moderately healthy option. Instead of racing off right away, I decided to eat at least some of my sandwich before starting to drive and soon we rolled the windows down b/c the sun was heating up the car. After a couple minutes, Jack said, "Jay, do you hear this warbler?" (that was singing out the side of the car that he & Heidi were sitting on) and then said something like, "... maybe it's just a funny-sounding Yellow but maybe not ...". I could hardly hear it (just a couple notes that I might have passed off as a Yellow) so after Jack continued to be fidgety about it, I got out to see what I could hear. I could see what Jack was saying ... Yellows often vary in their songs (i.e., they don't always do the perfect "Sweet, sweet, sweet I'm so sweet") but this had the potential to be something different. Jack wondered aloud about Magnolia or Chestnut-sided .... I said to Jack, "I'm not really familiar with Magnolia but do they have a 'wee-tee-o' at the end?", to which Jack said, "Yup!". After another minute, I finally spotted the songster singing from a Birch tree in the yard of a small apartment building. Meanwhile (I guess we were assuming it was just a funny-sounding Yellow), only Heidi had actually brought her binoculars from the car ... which she was nice enough to hand to me momentarily so I could ID the bird .... as Jack had suspected, a Magnolia Warbler!!