Join Redwood Region Audubon Society at the Humboldt Bay National Wildlife Refuge. This is a wonderful, two- to three-hour trip for people wanting to learn the birds of the Humboldt Bay area. It takes a leisurely pace with an emphasis on enjoying the birds! Beginners are more than welcome. Meet at the Refuge Visitor Center at 9 a.m. Call Jude Power at (707) 822-3613 for more information.

Redwood Region Audubon Society holds its monthly Conservation Meeting at Rita’s Margaritas and Mexican Grill, 1111 5^th Street, Eureka. (707) 445-8311.

Join the Redwood Region Audubon Society for this program presented by Dr. Jeff Hart. Jeff will report on his nearly 20 years of work in one of California’s most controversial regions and the hub of California’s water supply, the “Delta.” The Delta is an important but little-known area of meandering sloughs and fragile levees, where industrial agriculture and declining fisheries vie for precious water also coveted by special interests throughout the state. Jeff will talk about innovative bioengineering techniques to improve levees, and various habitat restoration efforts, including tidal marsh projects to improve fisheries, and working landscape projects that enhance waterfowl habitat. He will narrate the history of the Delta, including its early settlement, the impact of land “reclamation,” the endless water battles, recent “fixes” and the ethical and cultural issues underlying environmental conflict resolution. The program starts at 7:30 p.m. at Six Rivers Masonic Lodge, 251 Bayside Road, Arcata. Bring a mug for shade-grown coffee and come fragrance-free.

Meet at 10 a.m. to watch the rising tide at the foot of W. Del Norte St. bring in waves of godwits, willets, turnstones, and curlews. Tide will turn around noon; we hope to see a good show by then. Dress warmly in case it’s windy. Led by Alexa DeJoannis, formerly of HSU’s Shorebird Ecology Lab (202-288-5174).

Accompany Redwood Region Audubon Societ for a field trip to the Eureka Waterfront. Meet leader Ralph Bucher at 9 a.m. at the foot of Del Norte Street, where participants will scope birds from the public dock. Attendees will then drive to the trailhead at Truesdale Street and bird along the trail through the Elk River Wildlife Sanctuary. thebook@reninet.com or (707) 499-1247

Redwood Region Audubon Society is sponsoring a free public field trip at the Arcata Marsh and Wildlife Sanctuary. Bring your binoculars and have a great morning birding! Meet leader Michael Morris in the parking lot at the end of South I Street (Klopp Lake) in Arcata at 8:30 a.m., rain or shine. Trip ends around 11 a.m.

Redwood Region Audubon Society is sponsoring a free public field trip at the Arcata Marsh and Wildlife Sanctuary on Saturday, October 1. Bring your binoculars and have a great morning birding! Meet leader Christine Keil in the parking lot at the end of South I Street (Klopp Lake) in Arcata at 8:30 a.m., rain or shine. Trip ends around 11 a.m.

Join Redwood Region Audubon Society for a natural history trip around the Alderpoint area. Meet leader Tony Kurz at the Ray's parking lot in Garberville at 8:30 to carpool. We will leave shortly thereafter up Alderoint Road to look for uncommon breeders in our county like the Oak Titmouse, White-breasted Nuthatches, and Lark Sparrows. This is the start of spring, so we can look forward to seeing and hearing the first bright-colored migrants headed north from the tropics. There are no restrooms along the drive. Once we have reached the town, we will take a walk south along the railroad tracks on the Eel River. We will walk approximately 2 miles to the old railroad trestle to look for Rufous-crowned Sparrows (the only known area these occur in the county). We will also look for first wildflowers on this event.  Bring lunch, water, and sunscreen. The trip will end around 3 pm. tonyk_71220@hotmail.com or  559-333-0893.

Join Redwood Region Audubon Society to bird the College of the Redwoods. The College campus offers a variety of bird habitats: shrub hedges, fields, forests, marsh, and pond. Meet leader Alexa DeJoannis at 9 a.m. at the flagpole in front of Administration. Parking is free on weekends! (202) 288-5174.