MALAMA WAIMEA — The fifth annual Malama Waimea Community Work Day will be 9 a.m.-noon Saturday at Waimea Valley Audubon Center, with invasive species removal, cultural site care, and trail clearing. Bring gloves, closed-toe shoes, tools, sunscreen; supervised children welcome. Call 638-9199.

ALA WAI CLEANUP — Join Sierra Club for Ala Wai Small Boat Harbor cleanup Saturday. Meet at 8 a.m. at the harbor master's office. Bring sturdy shoes, hat, thick rubber gloves, sunscreen, water. Participants under 18 must have signed waiver. Contact Deborah Blair at 955-4168.

BLACKBERRY ASSAULT — The O'ahu Invasive Species Committee will lead a volunteer squad Saturday to eradicate Himalayan blackberry on the Mau'umae trail near Palolo. Meet at 8 a.m. at Church of the Crossroads for 45-minute hike on steep trail to work site; bring sturdy shoes, hat, water, lunch. To sign up, e-mail katymet@yahoo.com or call 292-6769.

HANAUMA FRIENDS — The Friends of Hanauma Bay needs volunteers 8-11 a.m. Sunday to clean up the beach, park and highway from Keahole Street to the blowhole. Meet near visitors center. Gloves, trash bags provided. Contact Harvey Shapiro, 395-1217.

THURSDAY HELPERS — Kaua'i's Limahuli Garden & Preserve of the National Tropical Botanical Garden seeks volunteers to restore native forest Thursdays, 8-11 a.m. Call Lahela Correa, (808) 826-1053, or Lea Taddonio, (808) 332-7324, ext. 228.

LITTER BUGS MAUI — Community Work Day is coordinating "Litter Bugs Me" cleanups at harbors, parks historic sites, beaches and other spots around Maui 8 a.m.-noon July 21. Trash bags and gloves provided; call (808) 877-2524.

NATURE CENTER WORKDAYS — Hawai'i Nature Center weekly volunteer workdays are held 10 a.m.-2 p.m. Saturdays at new location, 2131 Makiki Heights Drive; call 988-8995. Tasks include power-washing trailers, painting, planting.

CHUN'S REEF CLEANUP — Join Adopt-A-Beach Hawaii and Save The Sea Turtles International at noon July 28 for Chun's Reef Beach highway and coastal cleanup. Trash bag, gloves and purified water provided; bring hat, sunscreen and beach shoes. Meet at 61-529 Kamehameha Highway, Hale'iwa. See www.seaturtlesinternational.com or call 637-2211.

NATURE LOVERS WANTED — Volunteers needed to staff the Waimea Valley Audubon Center information kiosk, surrounded by gardens, ponds and endangered water birds. Must commit to three hours per week through August. Call Kelly Perry at 638-9199.

ARBORETUM WORK PARTY — Lyon Arboretum in Manoa holds a volunteer work party at 8 a.m. on the first Saturday of each month. Meet in parking lot, prepared for rain and sun; closed-toe shoes, bug repellent, hat, gloves recommended.

PINE TREE PULLERS — Help remove invasive pines near Maui's Hosmer Grove, 9 a.m.-noon Sundays. Transportation provided at 7:30 a.m. from Harbor Shops, Ma'alaea, and 8:15 a.m. from Mayor Hannibal Tavares Community Center, Pukalani. Closed footwear required; bring water and lunch. Reserve space by calling (808) 856-8341.

KOKUA HALEAKALA — Haleakala National Park needs volunteers for trail maintenance, visitor assistance, weed control, cultural demonstrations, library work and clerical help. Transportation from Makawao available. Apply at www.nps.gov/hale/supportyourpark/volunteer-opportunities.htm. Call (808) 572-4487.

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