By Glenn Stewart

At this moment, thousands of people are nervously watching the falcon nest camera atop the PG&E headquarters building at 77 Beale Street in downtown San Francisco. The female Peregrine Falcon nesting there since 2008 has disappeared and a new female has moved in to the territory.

All Peregrine Falcons look similar but not exactly alike. Variations in plumage on the head and neck make it possible to differentiate among adults. For example, some have a full black hood while others have more discernible malar stripes over their eyes. Markings on the upper chest area vary as well.

I will provide some background before reviewing the drama unfolding at this nest.

After we at the Santa Cruz Predatory Bird Research Group were involved in the Peregrine Falcon recovery from the mid-1970s to mid-1990s, we began watching the Bay Area population as a manageable sample of the statewide population. Today, we try to monitor about thirty Peregrine Falcon nests for occupancy and productivity from Marin to Monterey counties, and east to Contra Costa and Santa Clara counties. We enter nests to band about 25 nestling Peregrine Falcons each year.

Lil and her mate Dan exchange places on the nest in February / Photo from SCPBRG nest cam

During 2012, we followed 12 pairs nesting on traditional cliffs and another 12 pairs that we refer to as urban pairs because they use buildings, bridges and cranes as nest structures. It was interesting that the urban birds were more productive, producing an average 2.25 young per site while those on natural cliffs produced an average of 1.66 young.

The first post-DDT-era Peregrine Falcons seen in the Bay Area appeared on the Bay Bridge in 1983. The female was found shot to death a few months later near the duck blinds adjacent to the Bay Bridge Toll Plaza. Peregrines began using sites on both the east and west spans of the Bay Bridge in following years with little success. The bridge proved advantageous for staging hunting forays but was lethal for fledging youngsters, due to the long distance to land and paucity of perches below the roadbed for clumsy fledglings.

When we found peregrines hunting downtown, we put a nest tray filled with gravel on an unused 33rd story balcony of the PG&E building. The building was a favorite perch in the late 1980s but the nest tray was not used until 2003.…

By Ilana DeBare

As residents of San Francisco and the East Bay, we in Golden Gate Bird Alliance are all pretty much urban birders.

But David Lindo is The Urban Birder.

A native of London, Lindo has built a career around extolling the wonder of birding in cities. He’s done books, TV shows, tours and writes a blog called (of course) The Urban Birder.

“I’m all about trying to engage people who haven’t declared an interest in birds,” he said during his first visit to the Bay Area last week. “I see myself as a conduit, a gateway, a bridge. It’s all about looking up and realizing nature is all around us, not just on the TV or off in the countryside.”

When we learned that Lindo was visiting California, we got together with our partners at Outdoor Afro and hosted a small reception for him. We hope to sponsor him at a large public speaking event the next time he visits here.

David Lindo and Eagle Owl / Photo by Darren Crain

Lindo, 49, walked an unlikely path to birding. He grew up in a working-class black and Irish neighborhood in North London where he knew no one with any interest in birds. But he was fascinated by wildlife from early childhood – a “twitcher in the womb,” as he puts it, using the British word for a highly competitive birder.

“I’d look around and decide that sparrows were ‘baby birds’ and starlings were ‘mommy birds.’ It wasn’t until I was around seven and went to the library that I knew what they were called. I read things voraciously. By the age of eight, I was a walking encyclopedia on the birds of Britain.”

Lindo’s  first adult birding mentor was a foreman from his father’s factory who was an “egger” – a devotee of a British pastime, popular in Victorian times but now vilified by conservationists, of collecting eggs out of nests.

“Luckily I wsn’t contaminated with the egg collecting gene,” he joked.

Lindo uses his race, enthusiasm and humor to break down British stereotypes of birders.  “In Britain a lot of people have the impression that birders are male, big-bellied and white – dull people,” he said. “I break that stereotype in many ways. People think that birds are geeky or for nerds, but then they hang out with me and realize it is quite fun and contemporary.”…

Editor’s Note: Golden Gate Bird Alliance member Alan Krakauer is studying Greater Sage-Grouse behavior in Wyoming. A longer version of this post appears on his blog.

By Alan Krakauer

One of North America’s most spectacular birds is also a species that not many people have seen — the Greater Sage-Grouse.

Given the spectacular plumage of a male Sage-Grouse in display, why are these birds so hard to see? A quick look at a female Sage-Grouse tells you the girls are built for crypsis — well adapted to blending in with their environment. For most of the year male Sage-Grouse also play the hiding game, so unless scared into flight they may pass unnoticed.

Yet for a couple of months in winter and spring, males come into their traditional display grounds (called leks, from a Swedish word for “child’s play”) and put on one of the greatest shows on earth. These leks are often in fairly remote areas, and males typically attend them only in the early morning hours. Both of these reasons help explain why getting a look at this spectacle can be a bit of a challenge.

Greater Sage-Grouse / Photo by Alan Krakauer

The Sage-Grouse’s breeding clusters have captivated not only birders but evolutionary biologists as well. Unlike about 90 percent of birds, the males in lekking species don’t form a bond with their mate or provide any child care. Scientists are still trying to unravel some of the puzzles that leks represent:

• Why do males cluster together to display, rather than searching around for females, following females, or spacing themselves farther apart and defending larger territories like most other birds do?
• If males aren’t helping raise the kids, why are females so picky?
• What benefits do females get from choosing one male instead of another?
• And given that females often pick only a few among the many males on a lek, why do the “loser” males bother to stick around?

Lekking animals tend to be high on the charisma scale. Besides the spectacular Sage-Grouse and their cousins the Prairie Chickens and Sharp-Tailed Grouse, other lek-breeders include some of the most beautiful and acrobatic birds out there — birds of paradise, neotropical mannikins, peacocks, cock-of-the-rock, some hummingbirds, and Ruffs.

When we see a species in which males are larger or more colorful than females, we presume these differences are related to an evolutionary process called sexual selection, where one sex — often the males — competes either directly for access to females or indirectly by producing the best advertisement among the other males.…

By Ivan Samuels

When was the last time you went birding without binoculars?  Most birders would consider this a bad idea for obvious reasons.  But with experience, you would be surprised how many species you can identify without optics.  Birding by ear, by definition, implies that you don’t even need to see the bird for species recognition.  And in many cases, you already know the species you are watching as you begin to raise your binoculars.

In thinking about these questions, I started to wonder what a “big day” would have been like for Native Americans in the Bay Area during centuries past.  There are obvious differences of course, not the least of which is the amount of habitat that once existed.  Some species once common are now rare or extirpated, while others once absent now occur here.  But the variety of habitats once present can still be found today, and I started to daydream about what it would take to do a “Native American Big Day.”

Thinking beyond optics, the list quickly grows – no binoculars, scope, car, bike, flashlight, watch, playback equipment, phone, etc. etc.  But the rule is: If they could have done it, so can you.  You can go owling, but no alarm to wake you up or light to guide your way.  You can’t use an iPod, but pishing or whistling songs is perfectly acceptable.  You can’t drive, so you will need to plan carefully to insure you can hit the most habitats possible on foot.

Ivan Samuels birding (with optics) in southeastern Brazil

And you won’t be able to scope waterbirds, but with the aid of a kayak you can get pretty close to them.  It’s not important that your kayak is made out of plastic.  The point is, they could have done it.  And we can quickly agree that the time to try is during spring, when bird song and brighter plumages greatly help your IDs.

So once I heard that the Golden Gate Bird Alliance Birdathon was to be a spring tradition, the challenge was on!  I soon settled on the Bolinas area, as I regularly bird this species-rich area of west Marin County, and many different habitats occur within a short distance.  Furthermore, the Bolinas Lagoon itself seemed perfect for the kayak portion of the adventure.  The Coast Miwok is the group that once inhabited this diverse ecosystem, and so was born my team, “Miwok-Style.”…

By Phila Rogers

This morning is one of those days when there are such high spirits among the bird community that everything within earshot is caught up in the irresistible merriment.

It’s all because of the robins. “Clucking” and “chucking,” even bursting into brief explosions of song, they launch their attacks on the local berry crop.  Gorged with fruits, they fly – if they can — up into the surrounding trees to briefly digest their plunder before dropping down for more.

Sometimes in the midst of the frenzy, they fly into my windows.  It all suggests inebriation, but such impeccable experts as the staff at the Lindsay Wildlife Museum say, “no.”  All this bumping into things and even failing to get airborne is, instead, a matter of over-consumption, not of consuming over-ripe berries.

American Robin with berries / Photo by Bob Lewis

I like the story that robins are feathered distilleries, holding berries in their crop until they’ve reached the desired alcoholic content.  “No,” again say the killjoys. It’s simply (or not so simply) the excitement of a good meal in the company of others.

Their co-conspirators are often the sleek, elegant Cedar Waxwings.  No half-digested berries dribble on their perfect, burnished feathers.  Like masked robbers — or “Tao philosophers,” according to the poet Robert Francis in Waxwings — they share the feast without sacrificing decorum.  Once they have their fill, they move on in tight groups, calling back and forth in their high-pitched “zees.”

The high spirits of the morning are shared by all the other birds in the neighborhood.  Flickers, Red-breasted Nuthatches, chickadees — all sound off so as not to lose their place in the chorus.

This winter berry bacchanal will continue until most of the local berries are consumed and robins forsake the group to pair up for the serious business of building a nest and raising young.

Though the calendar reads only mid-February, spring is well underway in coastal California.  March 21 may mark the celestial spring, but official spring here begins on February 5, the midpoint between the winter solstice and the vernal equinox.

Anna's Hummingbird / Photo by Bob Lewis

Look around for confirmation – acacias in full golden glory, plums and almond in bloom, bulbs of every kind opening.  And in the bird world, juncos and Bewick’s Wrens are singing, and Allen’s Hummingbirds have arrived from the south to begin their breeding season. …