BLACKBERRY REMOVAL: Remove invasive Himalayan blackberry on the Mau'umae trail, 8 a.m.-3 p.m. June 14. For advanced hikers. Bring at least two quarts of water, lunch, gloves, hat, sunscreen, mosquito repellent, long pants, long-sleeved shirt and sturdy walking shoes. Meet at the Church of the Crossroads. RSVP by June 12 to Julia Parish at oisc@hawaii.edu or 286-4616.

POUHALA MARSH: Help remove invasive species and create habitat for endangered Hawaiian stilts, 8:30-11:30 a.m. June 14 at Hawai'i Nature Center. Bring work gloves and water, and wear a hat, sunscreen and covered-toe shoes; expect to get muddy. Contact Pauline Kawamata at 955-0100, ext.18, or volunteer@hawaiinaturecenter.org.

FRIENDS OF HALEAKALA: Hike-in trips to do maintenance and/or invasive species removal, June 21-23. Sign up at www.fhnp.org. For more information, contact Farley at 808-248-7660 or Matt at 808-876-1673.

CONSERVATION MEET: Volunteers needed for Hawai'i Conservation Conference, July 29-31. Orientation July 28. Contact Mariza Silva, silvam@hawaii.edu or 587-0061.

WAIMEA VALLEY GREETER: Volunteer greeters are sought to work one day a week for 2 1/2 hours at O'ahu's Waimea Valley. Information: Kelly Perry, 638-7766, ext. 203.

PALMYRA: A few hours a week of Honolulu office work can help The Nature Conservancy's Palmyra program. Info: palmyra_admin@tnc.org.