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Secrets of Songbird Migration | Cornell Webinar, 9 Sept, 3 pm Pacific Time

September 6, 2026
by

[Posted by Chuck Almdale, submitted by Edna Alvarez]

Discover the Secrets of Songbird Migration

Bird migration is among the most noticeable, intriguing, and exciting phenomena in the North American annual cycle of nature. We anticipate the arrival of birds each spring and fall and enjoy different assemblages of birds in the summer and winter. However, there are many challenges to studying bird migration. Sara Morris has been studying songbird migration on Appledore Island, Maine since 1990 and will share some observations and insights resulting from the long-term banding station at the Shoals Marine Lab.

This lectureship was established in honor of the late Paul Mundinger, who received his Ph.D. in Evolutionary Biology from Cornell University.

This free, hybrid event is open to all and will be offered in person at Weill Hall and streamed live via Zoom. Registration is only necessary if attending remotely (via Zoom).

Register today to join us in person or online

‘Pipers at the Gates of Dawn: Lower L.A. River trip: 29 Aug 26

September 5, 2026

[By Chuck Almdale]

A mirage of Western Sandpipers (Armando Martinez 8-29-26)

We hadn’t done this trip in quite a while (2018 and no one wrote a report) so we decided to go take a look at the Lower Los Angeles River, specifically the areas close to Willow St. in Long Beach, and next to DeForest Park in northern Long Beach. As with Glendale Narrows, these two locations almost always have a lot of vegetation and sediment on the bottom, and birds accumulate.

As expected, we had a lot of shorebirds, but no river otters*. The ‘pipers filled the air with their music and conversation throughout the morning. Someone new was always chiming in.

American Avocet, possibly juveniles (Armando Martinez 8-29-26)

I find it quite amazing that this skimmer (aka schnozz-bird) below managed to just fill the photograph frame corner-to-corner. Skimmers are more of a tropical bird, but they’ve been moving up from Baja California in greater numbers for the past few decades. In the 80’s we had to go to lower San Diego Bay to find them. They need calm waters, not open ocean waters, in order to feed, which they do by skimming the surface – flying very close to the surface with their lower bill, longer than the upper bill, slicing through the water. If they encounter something edible, the bill snaps up like lightning. I’m always afraid they’ll hit something solid and flip tail over head, tumbling across the water, but in 50 years I’ve never yet seen it happen. Upper Newport Bay and Bolsa Chica are two areas favorable to them.

Black Skimmer (Armando Martinez 8-29-26)

This Savannah Sparrow was in a grassy patch down in the channel, which we spotted in the distance. After looking at Armando’s photo below for a while, I came to the conclusion that it may well be Passerculus sandwichensis rostratus, aka “Large-billed” Savannah Sparrow. This subspecies – and some people think it should be split off as a separate species – breeds in northern Baja California with some birds wintering at the Salton Sea and along the coast of Southern California. We’ve seen them several times along the jetty between Ballona Creek and the Marina del Rey channel, gleaning something-or-other off the exposed rocks. I hadn’t heard of any in the Lower L.A. River, but I’m not shocked to see them there, if indeed that is what it was.

Savannah Sparrow, s/s rostratus “Large-billed”(Armando Martinez 8-29-26)

This ibis below may be exceptionally glossy (or iridescent) but it is not a Glossy Ibis, but a White-faced Ibis, albeit absent any significant white face. Go figure. The “rest of the story,” as one newscaster used to say, is that the white face of the White-faced Ibis is never extensive and consists only of a white line bordering the the entire base of the bill during their breeding period. The bird below has a hint of this in the lores between red eye and top of the bill. The Glossy and White-faced Ibises are very similar and hybrids are “not rare” (as NGS field guide, 8th ed. puts it). The ornithological community might have to revisit these two (or this single) species sometime soon.

White-faced Ibis (Armando Martinez 8-29-26)

Phalaropes are one of the hoped-for species at this location and we managed to find two, with one of them just outside the left frame of this photo. You can tell that because of the pattern of circular ripples they make in the water by spinning in circles. This spinning creates a vortex which brings deeper invertebrates up to the surface where these bird can pick them off with their needle-like bill. The Red-necked Phalarope is the “intermediate” phalarope as the length of their bill is a key field mark in differentiating the three species. All phalarope species are among the few “polyandrous exhibiting sexual dimorphism reversal” species. I counted somewhere around 35 such species out of over 11,000 in the world, but there may be more. If this phrase is unfamiliar, read this. During migration there can be flocks of several thousand phalaropes, mostly Red-necked, not far offshore of Palos Verdes Peninsula, so it’s not surprising that a few might wander over to the L.A. River channel, or get a little lost en route and follow the channel down from the San Fernando Valley..

Red-necked Phalarope (Armando Martinez 8-29-26)

The mouth of the swallow is very short, but very very wide, not a welcome sight to any fly.

Rough-winged Swallow just before capturing a fly (Armando Martinez 8-29-26)

If you didn’t know what “swallow-winged” meant before, look below.

Barn Swallow (Armando Martinez 8-29-26)

Two pairs of Barn Swallows.

Barn Swallows (Armando Martinez 8-29-26)

There were bound to be some Common Yellowthroats in the brush or grass in or near the channel. I’m surprised we didn’t see more than this single male, but we were mostly looking at the shorebirds.

Common Yellowthroat male (Armando Martinez 8-29-26)

There were plenty of Mallards present, and even more Canada Geese. [Or are they now American Geese? I haven’t heard.] It’s easy to see their iridescent purple (some say cobalt) speculum bordered by white when they fly, unlike when they’re sitting or swimming at Malibu Lagoon. That shadow seemingly in front of them is also interesting.

Mallard pair rocketing down the river to the sea (Armando Martinez 8-29-26)

There weren’t many Least Sandpipers on the river. Most of them were on the algae coating the surface in places, or in the grass on the tiny “islands.”

Least Sandpiper (Armando Martinez 8-29-26)

There were a lot more Western Sandpipers.

Western Sandpipers (Armando Martinez 8-29-26)
Western Sandpipers (Armando Martinez 8-29-26)
Western Sandpipers (Armando Martinez 8-29-26)
Black-necked Stilt & Western Sandpipers (Armando Martinez 8-29-26)

Three leggy species in one shot below. Here’s a question for birders. All field guides give the lengths of all the birds, but what exactly constitutes “length?” Think about it before looking it up or reading on. And which of these three birds below is the “longest,” or “lengthiest” if you prefer? Don’t read the next paragraph until you guess.

Left to Right: Long-billed Dowitcher, Greater Yellowlegs, Black-necked Stilt (Armando Martinez, 8/29/26)

Guess the longest bird above before reading below.

The lengths (per NGS 8th ed, 2025) left to right, are Long-billed Dowitcher 11.5″, Greater Yellowlegs 14″, Black-necked Stilt 14″. This seems absurd to me, but the lengths in bird literature is bill-tip to tail-tip, even when the bird – comfortably lying on its back in a museum tray as they tend to do – has feet sticking far past the end of the tail. So a Sandhill Crane is 41-48″ “long” and a Great Blue Heron is 46″ “long.” Forget the legs, they don’t count.

Humans were defined (or described) as “featherless bipeds” by none other than Plato. Supposedly, after hearing this definition, the irascible and cynical Diogenes plucked a chicken and brought it to Plato’s Academy shouting “Behold! I’ve brought you a man.” Always flexible and adaptable to correction, Plato amended his definition to include “with broad, flat nails.” Who knew that ancient Greek philosophers were such jokers and pranksters?

As we share our bipedality, shouldn’t we and the birds be measured in the same manner? Working within that system, can you guess how “long” you are? I’m 34″, far smaller than a 46″ Great Blue Heron, shockingly smaller than the 39″ Great Egret, barely larger than the 30″ Reddish Egret. How humiliating!

Reflections can play tricks on your eyes. At first glance these dowitchers may seem to be standing on mid-river rocks.

Long-billed Dowitchers (Armando Martinez 8-29-26)

The low angle of the sun sometimes creates weird effects with the light.

Greater Yellowlegs (Armando Martinez 8-29-26)

All birds are variable in appearance, but their variability is variable from species to species. Here we have both Yellowlegs species, one Lesser next to two Greaters. [Ignore those two birds in the back. They are not the birds you seek.] The bills on the two Greaters are significantly different, but I still think they are both Greaters; the one in the middle is a juvenile with a shorter straighter bill, and the one on the right is an adult with a longer slightly upcurved bill. The bills on long-billed birds often taken extra months to get to their final adult length after the rest of their body is sufficiently large and strong to fly. I don’t know if this also applies to the legs on long-legged species.

Yellowlegs: one Lesser, two Greater (Armando Martinez 8-29-26)

All I have to say to this guy is, “I didn’t put it there, but if you give it to me, I’ll see that it’s disposed of properly.”

Trashpicker Gull (Armando Martinez 8-29-26)

Two people had to leave early. The rest of us drove up to DeForest Park but our cars got separated. After locating the only access to the river at the south end of the park at the intersection of Deforest Ave. and East Osgood St., I walked up the embankment stairs to the river where I found green algae covering the river channel bottom but not a single bird on it except a group of gulls 3/4-mile away by the Artesia Blvd. bridge. I walked close enough to them to see that there was nothing there but Western Gulls, and returned to my car. Here I found Armando and passengers who had stopped at the park pickleball area and saw a few tree birds. But the list below includes only the Willow St. birds.

*River Otters: See The Wind in the Willows, chapter seven, and the first Pink Floyd album.

A google map of the area follows the checklist below.

Lower LA River 2026 & 201420262014
Date6-Sep30-Aug
Temperatures75-81°F70-88°F
*Estimated for numbers >50  
Canada Goose*60 
Egyptian Goose3 
Cinnamon Teal35
Northern Shoveler 8
Gadwall 2
Mallard*30110
Bufflehead 1
Feral Pigeon*20130
Eurasian Collared-Dove13
Mourning Dove4 
White-throated Swift 6
Allen’s Hummingbird 2
Common Gallinule 1
American Coot 25
Black-necked Stilt*200425
American Avocet*30160
Killdeer1565
Semipalmated Plover12
Short-billed Dowitcher 30
Long-billed Dowitcher*40200
Red-necked Phalarope2 
Spotted Sandpiper114
Lesser Yellowlegs22
Willet 1
Greater Yellowlegs304
Least Sandpiper*20490
Pectoral Sandpiper 1
Western Sandpiper*400100
Ring-billed Gull 20
Western Gull*80100
California Gull*650
Caspian Tern12
Pied-billed Grebe 1
Double-crested Cormorant86
White-faced Ibis20 
Black-crowned Night-Heron12
Snowy Egret45
Green Heron 1
Great Egret 2
Great Blue Heron22
Osprey 1
American Kestrel 2
Yellow-chevroned Parakeet 7
Black Phoebe42
American Crow306
Tree Swallow4 
No. Rough-winged Swallow15 
Barn Swallow*5045
Cliff Swallow2 
Swinhoe’s White-eye2 
European Starling 40
House Finch 12
Savannah Sparrow11
Yellow-headed Blackbird 1
Red-winged Blackbird 20
Great-tailed Grackle43
Common Yellowthroat1 
Orange Bishop 1
Totals Birds  
Species3648
Total birds10972119

A Bilateral Gynandromorph Bobolink | Smithsonian Magazine

September 4, 2026

[Posted by Chuck Almdale, submitted by Lillian Almdale]

Ofttimes things doth go awry. If there weren’t accidents and mutations in DNA, could evolution even take place?

An ‘Extremely Rare’ Half-Male, Half-Female Bird Temporarily Took Up Residence Outside of Chicago

The unusual-looking bobolink is what’s called a bilateral gynandromorph. The bird behaved like a male, eventually wooing a mate and raising fledglings.
By Sarah Kuta, daily Correspondent | Smithsonian Magazine | 21 August, 2026

The bobolink behaved like other males, singing, flying and establishing a breeding territory in hopes of wooing a female mate. Photo: Luke Dahlberg


Peregrine Falcon vs. L.A. Fox | BBC Wildlife

September 1, 2026

[Posted by Chuck Almdale, submitted by Lillian Johnson]

No preamble on this one, just go to the article and scroll down to the video.

Astounding footage shows peregrine falcon attacking foxes in Los Angeles

A wildlife photographer filmed the moment a peregrine falcon fiercely protects her chicks from red foxes.
By Megan Shersby | Film by Jack Zhi | 27 July, 2026 | BBC Discover Wildlife

Extreme weather is now a key predictor of bird presence | Yale News

August 28, 2026

[Posted by Chuck Almdale, submitted by Edna Alvarez]

Extreme weather now a key predictor of where bird species occur in North America, study finds
By Jim Shelton | 11 August 2026 | Yale News
A Yale-led study links severe weather to bird ranges and biodiversity for hundreds of North American birds. Accounting for extreme weather, the authors say, is critical to understanding and predicting where species are found in the environment.
By Jim Shelton, 11 August 2026

Using hundreds of millions of citizen science bird observations in the eBird database, researchers found that using data on the variability and extremes of climate were a better predictor than mean temperatures of when and where over 500 North American species were present. “The habitat ranges in [Means only] models without extreme weather events were, on average, 10% too large for winter months and 6% too large for summer months.”

Description:
Predicted breeding range of (a) Hooded Oriole (Icterus cucullatus), (b) wintering range of Eastern Phoebe (Sayornis phoebe), and (c) breeding range of Varied Thrush (Ixoreus naevius) across models including only climate means, climate variability, and extreme weather risk (left to right).
 
For variability and extremes, colored areas represent predicted suitable areas in all models, pink areas are suitable in Means but not Variability or Extremes models, and gray areas are suitable in Variability or Extremes but not Means models. Insets highlight regions with large differences between model predictions.

This article is based on research published 8 August 2026 in the journal Global Change Biology.

Continental-Scale Biodiversity Predictions Are Influenced by Climatic Variability and Extreme Weather
Jeremy M. Cohen, Diego Ellis-Soto, Shubhi Sharma, Frank A. La Sorte, Walter Jetz
First published: 08 August 2026 https://doi.org/10.1111/gcb.71028

Abstract:

Increasingly variable and extreme weather can push organisms beyond their physiological thermal or hydric tolerances and limit where they can persist, affecting their geographic distributions and biodiversity patterns. For example, organisms often live near their physiological limits at range edges and may be unable to persist in these regions under variable and extreme conditions. However, it remains unclear how climatic variability and extreme weather define continental-scale species distributions and biodiversity patterns. Here we link hundreds of millions of citizen science bird observations from 2004 to 2024 to high-resolution maps of within-year climatic variability and extreme weather risk, exploring how these factors define both summer and winter distributions and biodiversity patterns for 535 North American species across 2901 individual models. We find that species distribution models accounting for climatic variability or extreme weather risk performed better than others at predicting richness and individual species presences across 220 well-surveyed sites. Such models predicted narrower geographic distributions than models relying on only climatic means, especially at the range edges, resulting in species’ ranges that were truncated on average by 6% in summer and 10% in winter when climatic variability and extreme weather variables were included. These effects were observed in both seasons but were particularly strong in winter, a time with greater short-term weather variability than summer. Richness estimates were substantially lower when climatic variability or extreme weather were accounted for, especially in the US southwest and central plains (up to 35 fewer species), regions highly prone to extreme heat, cold, and drought. Our results suggest that more mechanistically informed biodiversity predictions that account for climatic variability and extreme weather are critical for reliably predicting distributional and biodiversity patterns.