Share 'Orange-Crowned Warbler'

For the past two days I've noticed a new guy at the backyard feeder, a small, dull-green bird with no wing bands, but a tiny patch of orange on the top of his head. Using my trusty Peterson Field Guide to Eastern Birds I concluded that I was looking at an Orange-Crowned Warbler. According to the guide this fellow usually spends the winter a bit south of here, altough we do seem to be on the edge…