Notes on your surroundings:Winter Walk--Which plants are...

Notes on your surroundings:

Winter Walk--Which plants are pollinated by bats? Why keep your distance from female ginkgoes? Find out on a guided tour of the Fullerton Arboretum Saturday starting at 10 a.m. Nature Guides, a support group of the Friends of the Fullerton Arboretum, will show visitors through several of the collections on the 26-acre grounds, including the native vegetation on Chaparral Hill, the desert collection, the redwoods, rose garden and rare fruit orchard. On display will be the man-made ponds and streams that have been colonized by numerous plants and insects and several species of birds. Guides will also point out the many textures of winter foliage. At the conclusion of the walk, visitors will have an opportunity to ask questions over a cup of coffee or cider.

The arboretum is at 1900 Associated Road in Fullerton. Cost is $5 for nonmembers. No reservations are required. Rain date is Feb. 1. Information: (714) 773-3404.

Tree Talk--Linda Romero, urban and community forester with the California Department of Forestry, will discuss “Revitalizing and Preserving Our Urban Forests.” at the Tree Society of Orange County’s annual meeting Saturday. Romero will give an historical perspective and describe how current trends, changing attitudes, growing populations and budgetary constraints affect today’s urban trees. Her presentation will also address options for sustaining urban forests and show examples of successful programs in California cities.

The meeting is from 3 to 5 p.m. at the HUB of Newport Mesa, 230 E. 17th St., No. 218, in Costa Mesa. Information: Gloria Schlaepfer, (714) 879-1938.

Shedding Light--Jerry King, Upper Newport Bay naturalist, will talk about “A Day in the Life of a Watershed” at a campfire Saturday in the amphitheater on Shellmaker Island. King is a water quality specialist with a special interest in the Back Bay. The campfire begins at 7:30 p.m. Bring warm clothes and a blanket; marshmallows and roasting sticks provided. Shellmaker Island is off Backbay Drive in Newport Beach. Information: (714) 640-6746.