Each year the National Aviary falconcam at the Cathedral of Learning runs from February through July to cover the peregrine breeding season. Streaming ended on 31 July but just the day before, on 30 July, Ecco and Carla bowed for a long time at the nest and Carla occasionally ate some gravel. (*more information on gravel below)
The entire bowing session lasted 8 minutes but they paused a lot so I sped up the video to double-time. At 3 minutes in, it looks as if Carla has left but she’s merely off camera. As she comes close again Ecco resumes e-chupping and bowing. Finally Carla flies away and Ecco stands up straight to watch her leave.
Though the bowing looks like courtship they won’t be starting a family anytime soon. Ecco and Carla live at the Cathedral of Learning all year long and bow to strengthen their pair bond, even in July.
The pair is generally less active in the summer but they’ll perk up when fall migration begins in earnest as they watch birds flying south over Oakland.
Nectar ferments, too, which prompted UC Berkeley biologist Robert Dudley to wonder how hummingbirds react to it. Do they like it or avoid it? Do hummingbirds get drunk?
Dudley tasked several undergraduate students with experimenting on the hummers visiting the feeder outside his office window to find out whether alcohol in sugar water was a turn-off or a turn-on. All three of the test subjects were male Anna’s hummingbirds (Calypte anna), year-round residents of the Bay Area.
They found that hummingbirds happily sip from sugar water with up to 1% alcohol by volume, finding it just as attractive as plain sugar water, but they sip only half as much when the sugar water contains 2% alcohol. …
“They burn the alcohol and metabolize it so quickly. Likewise with the sugars. So they’re probably not seeing any real effect. They’re not getting drunk,” he added.
Hummingbirds regulate their alcoholic intake. This stupefied Bohemian waxwing, reeling from too much fermented fruit, needs to have a conversation with them.
Scientists say that the smartest animals have large brains and have become so intelligent because their lifestyles force them to solve complex ecological (ex: food, habitat) and social problems (ex: long-term social bonds that may include absences).
When Auke-Florian Hiemstra published Bird Nests Made From Anti-Bird Spikes on 11 July 2023, the news spread like wildfire. The Guardian and the BBC immediately announced his report that Eurasian magpies and carrion crows incorporated spikes in their nests in the Netherlands and Scotland. The birds’ ironic re-use of our threatening material captured the Internet’s imagination.
Are the birds thumbing their noses (beaks) at us when they use anti-bird spikes? For the most part, no.
In the city it’s pretty common to see plastic in nests. For example this pigeon (nesting on top of anti-bird spikes!) included a length of red plastic wire in its nest. Notice the pigeon’s head behind the bend in the wire.
Hiemstra (@AukeFlorian) explains that Eurasian magpies (Pica pica) look for spiky things, like thorn branches, to protect the top of their dome-shaped nests. But thorn trees are hard to find in the city so …
Bird nests made from anti-bird spikes! ? Even for me as a nest researcher, these are the craziest bird nests I've ever seen. Today my paper came out on this rebellious behaviour. And it's like telling a joke…
So nesting birds aren’t thumbing their noses at us but parrots probably are. In Australia, where cockatoos live in the wild, they show their attitude toward our anti-bird attempts. Take that you nasty spikes! Hah!
Above, two young bobcats explore near a motion detection “camera trap” at Bosque del Apache. Below, a backyard cam caught the moment when a fox found a skunk in the dark.
Trail cam snaps an encounter between a red fox and a skunk (photo from Wikimedia Commons)
At Melissa Crytzer Fry‘s video camera trap in the Sonoran Desert, a mother Gambel’s quail chased away danger. Turn up the sound and find out what upset her.
Fledgling peregrine on the dog park windowsill (only 2 feet up), 5 June 2023 (photo by Leslie Mcilroy via Mark Catalano)
7 June 2023
At 6:30pm on Monday 6 June, Mark Catalano of Wildlife In Need Emergency Response was working dispatch in Central PA, making phone calls and sending texts and emails on behalf of a juvenile peregrine in a tiny dog park in Downtown Pittsburgh. The juvie needed assistance to be placed up high to start over on his first flight. Meanwhile Leslie McIlroy was in the dog park, protecting the bird from the visiting dogs.
Fledgling peregrine at the dog park on Third Avenue, 5 June 2023 (photo by Leslie Mcilroy via Mark Catalano)
Mark called the PA Game Commission but he knew it would be a long wait for a Game Warden. Since Mark is from Northumberland, PA he didn’t know any local peregrine contacts so he asked his wife to search the Internet for “Pittsburgh peregrine.” She found me, Mark sent me photos, and I told him about the Rescue Porch.
The Rescue Porch is a high balcony across the street at Point Park University’s Lawrence Hall. Another juvie had already tried it out this week, as seen by Diane Walkowski and Lori Maggio at 1:30pm on Sunday 4 June. (White arrow points to the bird.)
Juvenile peregrine calls from the Rescue Porch at Third Avenue, 4 June 2023, 1:50pm (photo by Lori Maggio)
Monday’s bird was stuck in a place I’d never heard of. It turns out that this narrow space under construction in 2021 became a tiny dog park with a tiny patch of grass. The yellow arrow points to a 2021 juvie who eventually landed in here. This year’s juvie hopped up to the low windowsill on the righthand wall, only two feet off the ground (photo at top).
Future dog park under construction on Third Ave, June 2021 (photo by Kate St. John)
Many thanks to Mark Catalano for starting the rescue and to Leslie McIlroy for guarding the bird until the Game Warden arrived three hours later.
Meanwhile, no news is good news. Sunday’s bird is out and about. Monday’s bird probably flew on Tuesday. Will the third youngster need a rescue too? Time will tell.
Imagine spending a day standing on dunes in cold wet weather and seeing a river of a quarter million warblers fly by. This amazing phenomenon was the perfect storm of location, migration and bad weather.
In late May boreal forest warblers such as Cape May, bay-breasted and Tennessee have reached or surpassed Tadoussac, Quebec on the way to their breeding grounds further north. They aren’t nesting yet, so if the weather turns sour they head back south temporarily to wait it out.
The weather forecast for 24 May looked promising for this perfect storm as Ian Davies (@thebirdsguy) writes in the day’s eBird checklist: “There were southwest winds overnight (tailwinds good for migration), combined with a big cold front arriving right around dawn, bringing rain, strong northwest winds, and colder temperatures — the same setup that has resulted in flights of tens or hundreds of thousands of birds in past Mays.”
Hoping for a river of warblers, Ian and 11 others headed out to the Tadoussac dunes to count birds. In 11.25 hours they saw 263,771 birds in 96 species! Ian writes:
The first couple hours of daylight featured drizzle and strong winds, and not many birds until about 6:45 … then 500 birds/minute by 7:30. The Tadoussac river of warblers had begun. This flight continued at 300-500 birds/minute until about 9:20, at which point the rain dropped significantly, and the flood gates opened, as many as 1345 warblers/minute raging past in a torrent of flight calls and glowing songbirds. Birds were everywhere, below eye level, flying between people, pouring through the bushes, landing on the sand, and one Cape May Warbler even tried to land on my arm. A Red-eyed Vireo flew into someone. It was madness. … For one period of time, the rate of warblers was 80,000/hour.
Here’s just one of the many videos attached to the checklist. See the checklist for amazing photos, videos and counts.
Today we saw a QUARTER MILLION warblers fly past Tadoussac, Quebec. >85,000 Bay-breasted Warblers, and >50,000 each of Cape May and Yellow-rumped Warblers. Full details, photos, and video here: https://t.co/7E1IEM1ouhpic.twitter.com/clkqS1DYAy
— TheBirdsGuy (Ian Davies) (@thebirdsguy) May 25, 2023
The location was key to this phenomenon. Tadoussac is located on the northwest coast of the wide St. Lawrence River which funnels birds heading south. If you look at the videos you’ll see that the cameras are pointed toward the St.Lawrence River — east/southeast — and that all the birds are flying southwest.
These birds had made it further north but when bad weather arrived they changed direction to escape the storm. Flying on the northwest wind they reached the unsheltered coastal dunes at Tadoussac so they headed southwest to the forest.
What a privilege it must have been to witness a quarter million warblers in just one day.
A study seven years ago of bird population trends predicted that climate change would cause most species to decline while a few would increase. In May 2016 I wrote about two species whose fates would be different.
The maps below show population trends during the non-breeding season. The white-throated sparrow’s trend map for 2007-2020 indicates their abundance dropped 30% in the lower Mississippi area and on the East Coast from New York to North Carolina.
I’ve noticed the drop in white-throated sparrows during their peak migration in early October and mid-to-late April. American robins seem the same as ever here in Pittsburgh
Have you seen a change in white-throated sparrows? Let me know.
(photo from Wikimedia Commons, maps from Cornell University eBird Status and Trends; click on the captions to see the originals)
Two weeks ago I wrote that there would be no peregrine eggs this year at the Cathedral of Learning because Morela was unable to lay any. She crouched and strained but appeared to be egg bound.
Since then Morela has had days when she looks very ill, then seems to recover a little, then looks ill again. Though she stopped standing over the scrape as shown above, she has not returned to her formerly energetic self. Her bleary eyes indicate she feels unwell.
He does what he can by bringing her food which he prepares more carefully than usual, as if he’s making it easy to eat. Unfortunately it is not enough.
On the morning of 7 May Morela felt bad enough that she left the nest for 36 hours. That day I found her facing the wall in the 38th floor southeast cache area.
She returned to the nest at 5:34pm on 8 May and seemed slightly better but in the next few days her health declined. In this snapshot she is leaning to the side, something she never did when healthy.
During a difficult night on May 11-12 Morela leaned a lot and may have lost her balance a couple of times. On Friday 12 May at 5:51am she left the nest and has not been seen since.
Her long absence and ill health indicate we probably won’t see her again.
Life goes on in the peregrine world. If Morela is gone a new female will come to the Cathedral of Learning to be Ecco’s mate. This year it’s too late to raise a family but if all goes well there will be peregrine chicks next year.
Hoping for happier times ahead.
UPDATE: Well, that didn’t take long! A new, banded FEMALE peregrine came to the nestboxon 14 May at 2:27 PM.
Here she is at the nest this afternoon. I thought this was Morela but when I looked at the image I can see that SHE’S BANDED! (Morela was unbanded.)
After a cold wet week in Pittsburgh it’s hard to imagine being excited about rain but this little owl (Athene noctua) in Britain is loving it. (Yes, “little owl” is his common name.)
