I managed to get another fairly good photo of the bird given the distance. This bird represents the 1st documented record for Northampton County!
For those interested in visiting the area where the bird spent most of the day, continue past the Tekening parking lot and turn into the Lower Mount Bethel Township Recreation Fields parking lot, which is just before the Belvidere Bridge. Park at the far end of the parking lot and walk across the soccer fields towards the river. The bird was most often near a boat launch on the New Jersey side, which is downriver from a distinctive aqua-colored house with bright pink shutters.