The Caledon: Scotland's Three Tenors, Jamie MacDougall, Ivan Sharpe and Alan Beck, breathe new life into some of Scotland's most powerful songs, 7:30 p.m., Palladium, 253 Fifth Ave. N, St. Petersburg. $15-$35. Call 822-3590.
'The Struggle to Save an Endangered Species': Author Mark J. Walters talks about how the Endangered Species Act failed a small songbird, the dusky seaside sparrow, 2 p.m., Weedon Island Preserve. Program is best for adults but suitable for ages 12 and up. Free. Call 453-6500.
'The Fungus Among Us': Bill Petty, master gardener and master naturalist, talks about Florida mushrooms and toadstools at a Natural History Speakers Series program, 7:30 p.m., Lake Maggiore Environmental Education Center, Boyd Hill Nature Preserve, 1101 Country Club Way S, St. Petersburg. Learn more about collecting, photographing and identifying some common mushrooms. Free. Call 893-7326.
Gospel show: The Journey, an a cappella gospel ensemble, performs a theatrical gospel show, 7:30 p.m., Palladium, 253 Fifth Ave. N, St. Petersburg. Enjoy the story from slavery to the present day. $15. Call 822-3590.
Classic rock: The Association, a 1960s soft rock band, performs, 7:30 p.m., Largo Cultural Center. $34-$37. Call 587-6740.
Upham Beach concert: Featuring the music of the Tom Stewart Band, 6:30-8:30 p.m., down 69th Street off Blind Pass Road and Gulf Boulevard, St. Pete Beach. Pack a picnic basket and enjoy an evening of sand, stars and sounds. Free. Call 363-9245.
Mad Beach island fest: At Food for Thought, taste restaurant specialties to the sounds of steel drums, 6-9 p.m., Gulf Beaches Public Library, 200 Municipal Drive, Madeira Beach. $20 advance; $30 door. Tickets available at Treasure Island City Hall and at the library or call 391-2828.
Sacred Space: The Narvaez/Anderson Indian mound, the site of an ancient Tocobaga village, hosts an afternoon of music with Mac Perry and tours of the site, 2-6 p.m., 1620 Park St. N, St. Petersburg. The event aims to make people aware of the archaeological site and enlist participants in a project to replace the roof of the shelter that is home to the Central Gulf Coast Archaeological Society's artifact museum and a theater. Snacks and drinks provided. Free. Call 347-0354.
Eastern European folklore music and dance: Performance by the Srpski Biser (Serbian Pearl) dance group, 5 p.m., Northeast High School, 5500 16th St. N, St. Petersburg. Fifty children dance in native costumes from different regions of the former Yugoslavia. Also performing: St. Nicholas Greek Dance Group and the Opanak dance group from Canada. $10. Call 409-3109.
Voice-over seminar with Brian Fasulo: TV and radio talent speaks about the business of voice-overs, 5-7 p.m., Venue Actors Studio, 9125 U.S. 19 N, Pinellas Park. $5. Tickets are $5 at the door. Call 656-8525.
Opera in the park: The Matinee Opera Players Chorus, directed by Mario Laurenti, performs selections from favorite operas, Broadway musicals and more, with narration by Bill Pringle, 3 p.m., Performing Arts Center, 4951 78th Ave. N, Pinellas Park. Reservations suggested. Free valet parking. $15; $10 for students. Call 518-4576.