WEED WARRIORS — Student volunteers 14 and older can help the Maui Invasive Species Committee catch coqui frogs tomorrow while learning scientific protocol and aiding conservation efforts. Reservations and parental approval required. Contact Shannon Wianecki at (808) 573-6472 or hoikeinfo @yahoo.com.

BEACH HOUSE KOKUA — A Kokua Clean Up Day is planned for 8:30 a.m. Saturday at the Baldwin Beach House, proposed location of the Maui County Environmental Resource Center. Contact Rob Parsons at Rob.Parsons@co.maui .hi.us or (808) 270-7960, or Nicole Lambertson at Nicoleye9@hotmail .com or (808) 250-3701.

WAIMANALO CLEANUP — O'ahu Surfrider Foundation is sponsoring a beach cleanup from 9-11 a.m. Saturday at Waimanalo Bay state recreation area, directly across from polo fields. Gloves, bags, water provided, with prize drawing afterward. Call 554-2902.

SPRING PLANT SALE — Lyon Arboretum Association's Spring Plant and Craft Sale will be from 11 a.m.-4 p.m. Sunday at Blaisdell Exhibition Hall; free. Call 988-0464.

HALEAKALA OVERNIGHTER — The Friends of Haleakala National Park will conduct a service trip April 7-10 to remove invasive species, trim weeds and restore nene habitat, with stays at the Paliku and Holua cabins. Call (808) 876-1673.

KANE'OHE WETLAND PROJECT — Volunteers are needed April 8 to help the Sierra Club clear a wetland of mangrove to create habitat for endangered water birds at Marine Corps Base Hawai'i. Because the base is a secured military facility, volunteers must provide name and Social Security number in advance and bring a signed waiver. Call Annette Kaohelauli'i at 235-5431.

EARTH DAY PLANNERS — Windward Ahupua'a Alliance seeks help in coordinating Earth Day event April 22 in Kawai Nui Marsh area, where focus will be on invasive-species removal. Contact Shannon Wood at 247-6366, 223-5535 or info@waa-hawaii.org.

KANAHA RESTORATION — Volunteers are needed daily for brush removal, rubbish pickup, planting and watering at Maui's Kanaha Beach Park. Contact Community Work Day at (808) 877-2524, cwdkhb@pixi.com or www.hear.org /naturalareas/kanahabeach.

KONA MULCH GIVEAWAY — Free mulch is available at the Kealakehe/Kona Transfer Station's green waste area, 6:30 a.m.-6:30 p.m. daily; bring pitchfork. Loading assistance is provided from 7 a.m. to 4 p.m.

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