PU'U WA'AWA'A SERVICE TRIP — Sierra Club is organizing two volunteer trips to Pu'u Wa'awa'a on the Big Island Feb. 3-10 and March 24-31. Activities include planting, invasive species control, fence repair, and hiking in forest bird sanctuary. Limited to 12 people; must be Sierra Club member. Cost is $150 ($100 for students) and includes transportation, food and lodging. Contact Janice Marsters at janicem@lava.net or (808) 988-3899.

CHRISTMAS BIRD COUNT — Hawai'i Audubon Society's annual Christmas bird count; $5 donation requested, children free. Participants will receive copy of 2006 American Birds Christmas Bird Count issue. Saturday in Waipi'o, O'ahu (Dave Bremer, 623-7613, merd001@hawaii.rr.com) and Sunday in 'Iao Valley, Maui (Jennifer Crummer, (808) 280-3449).

WORM COMPOSTING — Basics of vermicomposting, 9:30 a.m. Saturday, Christ Church Uniting, 1300 Kailua Road; $30 fees includes minibin, starter colony and manual. 382-0432 or waikikiworm@hawaii.rr.com.

MARINE DEBRIS — Learn to help reduce marine debris, 6:30-8 p.m. Jan. 5 at Mokupapapa Discovery Center, Outrigger Keauhou Beach Resort; sponsored by NOAA Marine Debris Program; 397-2651, ext. 256.

ALA WAI CLEANUP — Sierra Club for cleans up Ala Wai Small Boat Harbor on Jan. 6. Meet at 8 a.m. at the harbor master's office. Bring sturdy shoes, hat, thick rubber gloves, sunscreen, water; participants under age 18 must have waiver. Call Deborah Blair at 955-4168.

MANOA GUIDES — Volunteer guides needed for garden and heiau tours at Manoa Heritage Center. Mandatory training sessions start Jan. 20; call Susan Lessa at 988-1287.

RESTORE WILD PLACES — Ka'ala Farm Inc. is seeking groups to assist in floral restoration of five west O'ahu sites — in Kalaeloa, Nanakuli, Wai'anae, Makaha and Makua. Groups should be willing to commit to two to 12 volunteer days a year. Contact Bruce Koebele at 696-4954 or holopono@pixi.com.

Send listings to: For the Environment, P.O. Box 156, Wailuku, HI 96793; cwilson@honoluluadvertiser.com; or fax (808) 242-1520.