Go West: Exhibit Opening5 p.m. Friday, May 16, Dairy Arts Center, 2590 Walnut St., Boulder. World Migratory Bird Day7 a.m. to 2 p.m. Saturday, May 17, Walden Ponds, 75th St. and Valmont St., Boulder. Boulder Symphony Presents: Beethoven Symphony No. $30Celebrate 15 years of the Boulder Symphony with this stirring rendition of Beethoven’s 9th Symphony, the first concert performed by the ensemble in 2010. Boulder Cycling Club: Tuesday Night Rides5:30 p.m. Tuesday, May 20, leave from Twisted Pine Brewery, 3201 Walnut St., Boulder.