Tucson Weekly: Listings: Outdoors (May 20

OUTDOORS
ARCHAEOLOGY TOURS. The Center for Desert Archaeology offers group or individual tours of the significant sites in the Tucson Basin. Choose from ancient rock art, Hohokam ballcourt villages and more. Call 885-6283 for information, reservations requested 24 hours in advance.
Listings ARROWHEAD WORKSHOP. Old Pueblo Archeology Center. 1000 E. Fort Lowell Road. Allen Denoyer offers a beginning arrowhead-making and flintknapping workshop on Saturday, May 22, and an advanced-level workshop on Sunday, May 23. Both workshops are from 9 a.m. to noon. The cost is $25 per person per session. Call 798-1201 two days before to register.
BIODIVERSITY WALKS. The Southwest Center for Biological Diversity offers "biodiversity" walks at 9 a.m. the last Sunday of every month. Call Shane Jimerfield at 623-5252, ext. 302, for reservations and directions.
SKY-ISLAND ALLIANCE. Water Resources Research Center. 350 N. Campbell Ave. Carolyn Campbell presents a slide show on The Sonoran Desert Protection Plan at 7:30 p.m. on Thursday, May 20. Call 323-0547 for information.
TOHONO CHUL PARK. 7366 N. Paseo del Norte. 742-6455. Regular "Walk in the Park" tours, an overview of the park's 48 acres and its flora and fauna, are offered at 9 a.m. Tuesday, Thursday and Saturday, and at 1 p.m. Sunday. "Art in the Park" tours, docent-guided looks at gallery exhibits, are at 11 a.m. Tuesday and Thursday and 2 p.m. Sunday. The park offers additional guided tours for your enjoyment. "Birds of Tohono Chul" provides opportunities to observe the many species frequenting the park, and meets at 8 a.m. Monday, Wednesday, Friday and Saturday. Grounds are open from 7 a.m. to sunset daily. Exhibit hours are 9:30 a.m. to 5 p.m. Monday through Saturday, 11 a.m. to 5 p.m. Sunday. Greenhouse hours are 10 a.m. to 4 p.m. daily. Admission is $2. Call 742-6455 for a daily events schedule.