Tuesdays: The Hilton Head Island Audubon offers free guided tours of the Audubon Newhall Preserve led by master birders. Water, binoculars and insect repellant are recommended. No reservations are required. Gather in the parking lot at 55 Palmetto Bay Rd. by 8:30 a.m. For more information, visit www.hiltonheadaudubon.org/field-trips/.