A Black and White Warbler assumes his typical downward-walking nuthatch posture.
I see Black and White Warblers along the Little Miami by the Powder Factory all summer, and I've seen a few at Fort Ancient too, so this fellow may have been a summer resident getting ready to depart or a migrant stopping by to refuel on his trip south.
Click here for an interesting map (Figure 2) showing the travels of a group of migrating Black and White Warblers. Apparently, Black and Whites are slow migrators, taking 50 days to reach their breeding grounds at the rate of about 20 miles per day.
...the Black and White Warblers made pretty peeping sounds as they searched out caterpillars and other bugs. I always enjoy seeing them, and especially now. This might be the last encounter I have with one until next spring when they return or migrate through.