Audubon Naturalist Society
Woodend Sanctuary, 8940 Jones Mill Road, Chevy Chase. 301/652-9188 or www.audubonnaturalist.org
• The largest and oldest independent environmental organization in the region.
National Aquarium in Baltimore
501 E. Pratt St., Baltimore, at the Inner Harbor. 10 a.m.-4 p.m. Monday-Thursday; 10 a.m.-8 p.m. Friday; 10 a.m.-5 p.m. Saturday, Sunday. Admission $12.95-$21.95, with a range of packages at $14.95-$28.95. 410/576-3800, 410-659-4278, www.aqua.org. Tickets through the Web site or ticketmaster.com, both with service charges.
• Hundreds of exhibits with more than 16,500 animals. Popular exhibits include “Animal Planet Australia: Wild Extremes,” “Frogs! A Chorus of Colors,” “Play! The Dolphin Show” and the new 4-D Immersion Theater. See the Web site for details.
National Aquarium in Washington, D.C.
U.S. Department of Commerce building, 1401 Constitution Ave. NW. 9 a.m.-5 p.m. daily; last admission 4:30 p.m. Closed Christmas and Thanksgiving. Admission $2.50-$5. 202/482-2825, www.nationalaquarium.com
• Animal keeper talks and animal feedings 2 p.m. daily: sharks Monday, Wednesday, Saturday; piranhas Tuesday, Thursday, Sunday; alligators Friday.
National Zoological Park
3001 Connecticut Ave. NW. Grounds open 6 a.m.-6 p.m. daily, buildings 10 a.m.-4:30 p.m. daily through March 31. Free. 202/633-4800, nationalzoo.si.edu
• African-American Family Celebration. Family activities, live entertainment, talks with Smithsonian scientists, more. A tradition for more than 100 years. 10 a.m.-4 p.m. Easter Monday, March 24. Free and open to the public.
• Kids’ Farm. New two-acre exhibit helps children understand where food comes from. Cows, donkeys, goats, vegetable garden. Opportunities to groom the goats and donkeys. Near the Zoo’s Rock Creek Park entrance, at the bottom of Olmsted Walk. 10 a.m.-4:30 p.m. daily through March 31. Free.
Planetarium: Arlington Schools
1426 N. Quincy St., Arlington. 703/228-6070.
• Public multimedia programs 7:30 p.m. Friday, Saturday; 1:30 and 3 p.m. Sunday during school year. “Stars Tonight” program, live interactive talk with the planetarium director and a dome full of stars, 7:30 p.m. first Monday of the month (second Monday when first Monday falls on a legal holiday) during school year. Doors open 15 minutes before the show. No reservations needed. $2, $3.
Planetarium: The Einstein Planetarium, National Air and Space Museum
Independence Avenue and Fourth Street SW. 10 a.m.-5:30 p.m. daily. Metro: L’Enfant Plaza. 202/633-1000, www.nasm.si.edu/visit/theaters/planetarium. Imax theater schedule: 877/932-4629.
• Planetarium shows: “Cosmic Collisions,” “Infinity Express,” $6.50-$8.50; call for showtimes. “The Stars Tonight — Open Your Eyes to the Skies,” 11:30 a.m. Tuesday, Thursday, Saturday. Free.
Planetarium: Rock Creek Park
Nature Center, 5200 Glover Road NW. 9 a.m.-5 p.m. Wednesday-Sunday. Closed major holidays. 202/895-6070 or www.nps.gov/archive/rocr/planetarium
• The only planetarium in the National Park system. Planetarium shows 1 p.m. Saturday, Sunday for children 4 and older; 4 p.m. Saturday, Sunday for children 7 and older. After-school show 4 p.m. Wednesday. Outdoor evening stargazing sessions once a month April-November at adjacent Military Field, off Military Road.
Second Chance Wildlife Center
7101 Barcellona Drive, Gaithersburg. 9 a.m.-5 p.m. daily. 301/926-9453, www.scwc.org
• The only rehabilitation facility for wildlife in the metro area.
• Orientation sessions for volunteers who want to care for orphaned and injured wildlife, especially newborns: 2 p.m. Wednesdays and Saturdays Feb. 20 and 27; March 1, 12 and 15. Register through the phone number or at the Web site.
U.S. Botanic Garden
100 Maryland Ave. SW, adjacent to the U.S. Capitol. Conservatory 10 a.m.-5 p.m. daily; National Garden 10 a.m.-5 p.m. through May 31. Free. 202/225-1116, www.usbg.gov
• “An Alphabet Garden of Orchids.” Annual show of hundreds of orchids, including rare and endangered species, from the collections of the U.S. Botanic Garden and the Smithsonian Institution’s Horticulture Services Division. Through April 13.
• “How Plants Work: A Guide to Being Green.” The daily realities of life as a plant. East Gallery. Permanent exhibit.
U.S. National Arboretum
3501 New York Ave. NE. 8 a.m.-5 p.m. daily. Closed Christmas and federal holidays. Free. 202/245-2726 or www.usna.usda.gov
• Korean New Year Exhibition. Stones from Korea for the Lunar New Year and the artwork of Myung Sook Kim, a Korean-American painter, potter, and seal engraver. National Bonsai & Penjing Museum. 10 a.m.-3 p.m. Through March 5.
• Full Moon Hikes. Arboretum grounds regardless of weather. 7-9 p.m. Feb. 19 and 20 (both full). $19. Registration required online or by mail; 202/245-4521 for information.