Francis Bay Trail is a good hike for bird-watchers. The beginning of this 0.5-mile trail is well marked on the west end of the Mary Creek paved road. It passes through dry forest, goes past estate house ruins, and skirts a mangrove forest and salt pond. The trail ends at Francis Bay Beach [1].
Links:
[1] http://www.moon.com/destinations/virgin-islands/st-john/sights/north-shore/francis-pond-and-bay