People are visual and detailed. You notice this when you sketch people almost daily, taking note of visual elements unique to different ethnicities, genders and ages. The latter was the case with this lady, as she stood out for both her wonderful visage and the fact that she was reading a book about bird watching amongst a sea of commuters immersed in their Washington Posts, Wall Street Journals, and the latest viral grumpy cat meme on Facebook.
Jason Pearlman 
Serious business, that watching birds.
Actually, if you have a sharp-enough eye, you can spot the birds here that have obviously escaped from the National Zoo.
Sent from my iPhone
Ooh nice job capturing the juicy under-eye fat, neck skin, brow furrow, and dropped upper lip. Old people are so goopy, it’s perfect.
Thanks!