There is a world out there with marshes and forests, bald eagles and herons, a world that city people may never have seen. So the Audubon Naturalist Society takes youths, ages 12 to 17, for one-day trips to meet this other world. Each trip, including transportation from the Chevy Chase headquarters, costs $3, and leaves at 8 a.m. Saturdays. Participants are asked to reserve ahead, dress warmly, bring luch, and if they have them, binoculars. Next Saturday, they will be introduced to bald eagles, herons, geese, and ducks at Blackwater National Wildlife Refuge. January 15 they will see Hughes Hollow and its winter song birds. January 22 they'll discover the marsh, swamp, and forest communities of Jug Bay Nature Study Area, and January 29 they will observe diving ducks and shore birds, even owls perhaps, at Sandy Point State Park. In February there are hopes for a cross-country ski weekend and a geology trip.

For younger children, ages 4 to 9, the Audubon Naturalist Society has a six-week series of nature programs beginning in February for children to learn about how animals and plants survive the winter. There may still be a few spaces in these programs, but if not, you can find out about the spring programs before they are filled.

Nature programs for young people. Audubon Naturalist Society, 8940 Jones Mill Rd., Chevy Chase. To register, call Bernadette, 652-5964.