Class fees include admission to the gardens. Saturday, Jan. 21, 2:30 to 4 p.m.: Basics of Preserving Butterflies; $14, $10 member. Thursday, Jan. 26, 6 to 8 p.m.: Arizona's Ducks and Geese; $20, $15 member. Saturday, Jan. 28, 10 to 11:30 a.m.: Gardening in Tucson; $20, $15 member. People with a disability may request accommodation. Hours are 8:30 a.m. to 4:30 p.m., daily. Visit tucsonbotanical.org to register and for more information.