Ringwood-Emeralds and rubies are never more precious than when they combine to form the elegant garden jewels known as ruby-throated hummingbird. Presented by Program Director Philip De Rea, this outdoor class will teach about the ruby-throated hummingbird's perilous life; how to attract these chittering dynamos to your yard, and keep them coming back. This program is offered on four dates;Saturdays, Aug. 7 and 21; Wednesday, Aug. 18, and Sunday, Aug. 22 from 9 a.m. to 10:30 a.m. Pre-registration is required. The Aug. 7 program will be followed by an Introduction to Butterfly Gardening workshop. The cost of the program is $10 per person, with a $4 discount for members of the New Jersey Audubon Society and includes handouts. To register by mail send in your name, address, phone number, the number of participants and payment to: NJAS' Weis Ecology Center, 150 Snake Den Road, Ringwood, NJ 07456. For more information, or to register with a credit card, contact the Weis Ecology Center office at (973) 835-2160 between 8:30 am and 4:30 p.m. Wednesday through Sunday. Visit them online at www.njaudubon.org. New Jersey Audubon Society (NJAS) fosters environmental awareness and a conservation ethic; protects New Jersey's birds, animals, and plants (especially endangered and threatened species); and promotes the preservation of New Jersey's valuable natural habitats. NJAS is a privately supported, not-for-profit, statewide membership organization. Founded in 1897, it is one of the oldest independent Audubon societies. With more than 20,000 caring and committe