"Exotic Mammals in South Florida." Presentation in wildlife series. $5. 7:30-8:30 p.m. Deering Estate at Cutler, 16701 SW 72nd Ave. Details: (305) 235-1668, ext. 242.
Catch and release pipefish, seahorses and sea urchins in a guided tour of the seagrass beds. Wear waterproof shoes, change of clothes. $10. 1-3 p.m. Marjory Stoneman Douglas Biscayne Nature Center, 6767 Crandon Blvd. Details: (305) 361-6767.
MATHESON HAMMOCK BIRD WALK
Juan Villamil leads birders through the hammock. Sponsored by the Tropical Audubon Society. 7:30-11 a.m. Meet at parking lot area left of the park entrance. Matheson Hammock Park, Old Cutler Road. Details: (305) 666-5111.
MUSIC FEST MIAMI
Scheduled performers include Take 6, AZ, Kim Burrell, Inner Circle, Morgan Heritage, Arturo Sandoval, Richard Elliot, Allison Hinds & Square One, Leon Caldero. $5. Noon. AT&T Amphitheater, Bayfront Park Management Trust, 301 N Biscayne Blvd. Details: (305) 573-8212.
Featuring the 20th annual True Value Country Showdown South Florida State Final and music by Blake Shelton and the Buck Wild Band. Dancing, games, food, drink. Co-sponsored by WCTH-Thunder Country 100.3. $12; $5 for ages 4-10. Deering Estate at Cutler, 16701 SW 72nd Ave. Details: (305) 245-8150.
VIRGINIA KEY BIRD WALK
David Wright serves as guide. Sponsored by the Tropical Audubon Society. 7:30 a.m.-noon. Meet in the west end of the Seaquarium parking lot. Details: (305) 666-5111.
A.D. BARNES PARK BIRD WALK
Gifi Pardo serves as guide. Sponsored by the Tropical Audubon Society. 7:30-11 a.m. Meet in baseball fields at first left after entering A.D. Barnes Park on Southeast 40th St. Details: (305) 666-5111.