A two-to-three-hour bird walk with the Friends of the San Pedro River in the San Pedro Riparian National Conservation Area, home to over 100 breeding bird species and a migration corridor for another 250 migratory and wintering birds. Walkers usually see 30-60 species. Bring water, a hat and binoculars. All are welcome, but the walk may not suit young children; terrain is uneven and can be moderately difficult. No dogs. Free; no reservations required. Participants sign a liability waiver before the walk. Meet at the San Pedro House, 9800 E. Highway 90. Questions: (520) 508-4445 or fspr@sanpedroriver.org.