SWAP will hold its monthly nature walk in the Elfin Forest of Los Osos at 9:30 a.m. Saturday, April 16. In honor of California Native Plant Week, butterfly enthusiast Pat Brown will lead a walk from the point of view of a hungry butterfly. Bring a pair of close-focusing (5-10 ft.) binoculars.

Park at the north end of 15th Street (16th for wheelchairs) off Santa Ysabel Avenue in Los Osos. Wear comfortable shoes, long sleeves and pants to avoid poison oak. Park avoiding driveways and mailboxes, and leave pets at home. For more information call . Walk lasts 1-1/2 to 2 hours on the Elfin Forest boardwalk.