Tucson Weekly: Listings: Outdoors (April 29

OUTDOORS
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.
Listings SABINO CANYON VOLUNTEER NATURALISTS. Enjoy free weekly activities at Sabino Canyon, continuing through the month of April. Activities include guided nature walks and panning for sand rubies. Call 513-0231 for information.
TOHONO CHUL PARK. 7366 N. Paseo del Norte. 742-6455. 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.