PHOENIXVILLE PA – Accompanying an early spring, like that being experienced now along the Route 422 corridor, comes the return of birds cruising above the road though the airspace known as the “Atlantic Flyway.” Chester County naturalists say it’s a perfect time to learn more about our “fine-feathered friends.”

So Vincent Smith, an experienced bird-watcher in the Valley Forge and Audubon area, will lead a free morning bird walk March 24 (2012; Saturday) from 8 to 10 p.m. at the county’s Black Rock Sanctuary, 953 Black Rock Road, Phoenixville PA. Participants who join Smith will learn some of the techniques used to identify birds such as birding by color, shape, song, and habitat.

• This event has been added to The Post calendar.

Smith intends to explore the sanctuary’s unique meadows and wetlands. He’ll point out birds that inhabit its natural areas, as well as those stopping by for an early spring visit. Beginners are welcome, organizers say.

Walkers should meet in the sanctuary parking lot, located on PA Route 113 between Riverwalk Drive and Winding River Boulevard, about 1-1/2 miles north of downtown Phoenixville. Be forewarned: GPS units may direct people to the wrong location.

Advance registration is required. Register by downloading a registration form, here, or by calling the park at 610-469-1916.