Notes about your surroundings

Bluebirds Trip--The Sea & Sage chapter of the National Audubon Society will conduct field trips Friday and Saturday to Yorba Regional Park in Anaheim to see nesting bluebirds.

Trip leader Dick Purvis will take groups of 10 people or fewer in one- to two-hour shifts to see the bluebirds that are using the nesting boxes he has built at the park.

Each trip will begin at 8 a.m.

The park is at 7600 E. La Palma Ave. For more information, call the chapter office at (714) 261-7963. Bay Tours--A guided tour of the Upper Newport Bay Ecological Reserve will be offered Saturday by the California Department of Fish and Game and Orange County Harbors, Beaches and Parks.

The trip begins at 9 a.m. It is free and lasts about 2 1/2 hours.

Those who would like to participate are asked to meet at Shellmaker Island off Backbay Drive in Newport Beach. For more information, call (714) 640-6746. Wetlands Tours--Guided public tours of the Bolsa Chica wetlands will be led Saturdaymorning. The tours, sponsored by Amigos de Bolsa Chica, will depart from the wetlands ecological reserve every 20 minutes beginning at 9 a.m. The last tour will depart at 10:30 a.m.

Bolsa Chica is one of the best bird-watching sites in the county, and many spring migrants are now in residence there. Birds likely to be seen on the tours include egrets, loons, herons and grebes, among other waterfowl.

Those who would like to take the tour are asked to meet at the ecological reserve on Pacific Coast Highway about half a mile south of Warner Avenue across from Bolsa Chica State Beach.