Friday

"Perspectives: Doris Salcedo." In tandem with the opening of new installation of her politically charged yet subtly crafted conceptual works at the Blanton Museum, Colombian artist Doris Salcedo will give a gallery talk. 6 p.m. Friday. Blanton Museum of Art, 200 E. Martin Luther King Jr. Blvd. Free with museum admission ($5-$9). 512-471-7324, blantonmuseum.org.

"Green Zone: Julie Moon and Rick Mansfield." A playful surrealism infuses the ceramic sculpture of Julie Moon and painted bronze works of Rick Mansfield. Opening reception: 7 to 11 p.m. Friday. Exhibit continues through Dec. 13. Mass Gallery, 507 Calles St. Free. massgallery.org.

Line Upon Line Percussion. The always inventive percussion ensemble Line Upon Line kicks off their new season with a program including Toru Takemitsu’s "Rain Tree," Rolf Wallin’s "Stonewave"and the premiere of Andrew Greenwald’s "99 Words" for three heavily-altered snare drums. 8 p.m. Friday. Big Medium Gallery, Canopy, 916 Springdale Road. $10-$30. lineuponlinepercussion.org.

Sunday

"17,000 Observations." Los Angeles artists Lucky Dragons (Sarah Rara and Luke Fischbeck) present their site-specific artwork directly informed by the biological diversity of Laguna Gloria. A sculptural mobile of circular mirrors is suspended between trees across a footpath and is accompanied by a field recording made over a 24-hour period at the 12-acre lakeside sigh in which the songs and calls of numerous bird species are manipulated, overlapped and modulated. On Sunday at 2 p.m. a live ensemble will accompany a public presentation of the 30-minute manipulated field recording. Through Dec. 9 visitors to Laguna Gloria can access the "17,000 Observations" recording of the performance and view the sculptural installation through Dec. 9. Contemporary Austin, Laguna Gloria, 3809 W. 35th St. Free. thecontemporaryaustin.org.