MICONIA SURVEY — The O'ahu Invasive Species Committee needs help 8 a.m.-3:30 p.m. Saturday to survey the invasive plant Miconia calvescens. Bring pants, longsleeve shirt, water, lunch, rain gear; footwear provided. Meet at Church of the Crossroads. Reservations required; joshuafi@hawaii.edu or 292-6769.

ADOPT-A-BEACH — Volunteers are needed Saturday for a beach cleanup at Chun's Reef, sponsored by Save The Sea Turtles International, Adopt-A-Beach Hawai'i, the National Recycling Coalition, Hale'iwa Joe's, Surf & Sea, Breaker's Hale'iwa and Turtle Bay Resorts. Meet at noon at 61-529 Kamehameha Highway; trash bags, gloves, water provided; bring hat, sunscreen, beach shoes. 637-2211, www.seaturtlesinterna tional.com or www.adoptabeach hawaii.com.

CRATER OVERNIGHTER — Volunteers are needed Saturday and Sunday for a Friends of Haleakala National Park service trip to remove non-native plants at Kapalaoa Cabin. (808) 876-1673.

HANAUMA BAY — The Friends of Hanauma Bay group needs help 8:30-11:30 a.m. Sunday cleaning up the beach, park, and Kalaniana'ole Highway from Keahole Street to the Blow Hole. Meet in upper picnic area next to visitor center. 395-1217.

FISHPOND WORKDAY — The next Waikalua Loko Fishpond Community Stewardship Workday is 7:30 a.m.-1:30 p.m. Jan. 28. Work includes hauling boulders and gravel, pulling mangrove and pickleweed, removing marine debris, staffing hospitality booth. Gloves, trash bags, breakfast, lunch provided. Register by Jan. 26. 247-6366 or 223-5535, or info @waa-hawaii.org.

HUMPBACK WHALE COUNT — The Hawaiian Islands Humpback Whale National Marine Sanctuary will hold its annual whale count Jan. 28, Feb. 25 and March 25 at 65 sites on O'ahu, Kaua'i and the Big Island. To register, call (888) 559-4253, ext. 253, on the Big Island; (808) 246-2860 on Kaua'i; 397-2654, ext. 253, on O'ahu. For more information, see hawaiihump backwhale.noaa.gov.

WEED & POT CLUB — Maui Nui Botanical Garden's Weed & Pot Club meets 8:30-10:30 a.m. Wednesdays at 150 Kanaloa Ave. in Kahului to weed, rake, trim or transplant nursery plants and perform other work. Tools, gloves and drinking water provided; bring sunscreen, wear shoes.

KANAHA WILDLIFE REFUGE — Weekly volunteer workdays at Maui's Kanaha Pond Wildlife Refuge, 7:30 a.m. Thursdays. (808) 572-6338.

MORNING TRAIL SWEEPERS — Lyon Arboretum in Manoa seeks early morning walkers to hike the arboretum trails, clearing fallen palm fronds and other debris from paths. Call volunteer coordinator Jill Laughlin at 988-0461. The arboretum also holds volunteer workdays on the first Saturday of each month.

WILIWILI SEED PROJECT — Lyon Arboretum needs volunteers to prepare seeds for storage, as part of its Wiliwili Seed Conservation Project in response to the spread of gall wasps. Training will be provided. Contact Jill Laughlin at 9880461.

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