Tag Archives: sandpipers

Hi-Line Report: Bad Weather Can Bring Good Birds

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Most serious Montana birders try to make it up to the Hi-Line every year. If you’ve never heard of the Hi-Line, it is the northern region of the state that basically follows Highway 2 from East Glacier National Park all the way to the North Dakota Border. It’s an area full of rolling hills, badlands, farms and ranches—and a whole lotta birds. For Braden and me, the region is best represented by the Bowdoin National Wildlife Refuge, a sprawling 15,551-acre refuge near Malta that encompasses a rich variety of wet and dry habitats. We don’t make it up to Bowdoin every year, but this year I was fortunate enough to get invited to visit a school in nearby Chinook. Even better, I timed the visit for spring migration and breeding. I booked an Airbnb in Malta and drove up two days early to give me a full day at Bowdoin. The bad news? The forecast called for rain.

Indeed, when I arrived at the refuge at 6:00 a.m., rain pelted the car, propelled by a cold wind. Geez, I thought. I’m not going to see anything today. It was so cold and wet that I skipped my usual stop at the visitor center and instead headed straight out onto the first, five-mile section of the fifteen-mile loop around the lake. I noted that water levels, although not great, were better than I’d seen them two years before, but the first five-mile section was a time to focus not on water birds, but on denizens of the grass. Normally, in fact, Braden and I spend the most time in this section, stopping frequently to listen for Grasshopper Sparrows, Baird’s Sparrows, Chestnut-collared Longspurs, and other grassland favorites (see our post “Great Grassland Birding”). Today, that proved impossible. Every time I opened the window, wind and rain cascaded in and made it almost impossible to hear calls beyond the heavy-metal songs of Western Meadowlarks.

**Steady rain and wind limited my ability to find grassland birds!**

Mercifully, a few species took pity on me. Right off the bat, I espied one of our favorite birds, a Bobolink—the only one I would see the entire trip. Then, I spotted a drenched Grasshopper Sparrow perched on a small bush—the lone GRSP I would see that day. Lark Buntings also put in an appearance, along with Horned Larks and Savannah Sparrows. I also was pleased to see shorebirds, but on this section of the drive, they were far away. At one point, I leaped out to set up the scope I was testing out (see our next post), but immediately got drenched and was unable to ID much except for Wilson’s Phalaropes, American Avocets, and a Willet.

**Lark Buntings were the most cooperative grassland birds I managed to see on this cold, wet, windy day. Thank you, Lark Buntings!**

As I kept driving, however, conditions steadily improved and I got better looks at shorebirds. The phalaropes were especially impressive and I estimated at least a thousand out on the water and working the shore. The vast majority were Wilson’s, but with patience, I found a group of four Red-necked Phalaropes—most clearly identified by their smaller size, overall darker appearance, and distinct light lines running down their dark backs. Ducks were not super abundant, but plentiful and I counted at least ten species, including my first-of-the-year Canvasbacks!

Twice, I drove down to some boat ramps and, despite the rain, nabbed a good “harvest” of shorebirds. I found about half a dozen Semipalmated Sandpipers and one Western Sandpiper. The real surprises, which I confirmed later with Braden’s help, were a Baird’s Sandpiper and a White-rumped Sandpiper! The latter was especially difficult to figure out because it didn’t readily show the diagnostic, thin lines of spots extending from the neck down to below the wings, but the overall appearance and body size fit. I was thrilled to find these birds as we’d never found them at Bowdoin before. Then again, we’d never birded Bowdoin this early in the season, so they were all part of my continuing Montana birding education.

**Both this Baird’s (left) and several Semipalmated Sandpipers (right) proved early season surprises on this cold, rainy Bowdoin day.** **The larger size, long wing tips extending beyond the tail, and “medallion” appearance on the wings help distinguish Baird’s from the smaller peeps.**

As I was leaving the second boat ramp, I noticed a Marbled Godwit in the parking area. Godwits, like Willets and Long-billed Curlews, are shorebirds and grassland birds. They nest in grasslands, usually near water, so seeing one here didn’t surprise me. I was about to drive off when the godwit suddenly launched itself. As I watched, it flew a hundred yards or so to the shore—and landed next to two birds I had especially hoped to see: Black-bellied Plovers! Loyal FSB readers will note that I’ve written about these fine birds a lot in the past couple of years (see, for instance, this post), and so it was with special pleasure I observed them now—and in their best black-bellied breeding plumage. Thank you, Mr. Godwit, for pointing them out!

**This helpful Marbled Godwit (right) made a special effort to point out two Black-bellied Plovers that I had so woefully overlooked!**

By the time I made it back to the visitor center, my stomach rumbled and, though the rain had slackened, the cold and wind remained. I debated whether I should even get out of the car to explore around the small pond there, but I knew that Braden would never forgive me if I didn’t. Marshaling my determination, I walked over to the start of the little path that circumscribes the pond. Almost immediately, a curious face popped up from behind a bush thirty feet away. “Whoa!” I whispered. At first, I thought it was a weasel, but it was much larger than the three or four weasels I’d observed in the past. Stoat? Ferret? I asked myself. Could it possibly be a mink? I’d never seen a mink and didn’t know if they even lived in Montana, but it seemed to fit the profile. Later, iNaturalist experts helped me confirm that that’s what it was. After looking at me for several moments, the long, bizarre-looking creature loped across the road and disappeared into the brush. The birds, however, were not to be outdone by a mere mammal!

**Seeing my lifer American Mink was about the last thing on my mind as I braved Bowdoin’s visitor center area for one last birding effort!**

As I began poking around the beginning of the trail, I saw shapes flitting about in the bushes. A brownish bird streaked by me giving off Swainson’s Thrush vibes, but I didn’t see it well enough to definitely identify it. Minutes later, a reddish-backed bird landed on a nearby branch below me—a Veery! Then I got a good look at another Swainson’s Thrush, this time confirming the ID. In the branches above it, an adorable little Least Flycatcher watched me, but none of these would be the stars of the show.

Empidonax flycatchers are notoriously difficult to identify by sight, but this bird’s “cute” appearance—and the fact that no other empids should have been anywhere in the area—helped clinch the ID.

Even through the wind, I could hear both Yellow Warblers and Common Yellowthroats around me, even if I couldn’t get clear looks at any of them. Then, a small songbird landed in a tree about thirty feet away. I got my binoculars up in time to recognize a species I had longed to see—a Blackpoll Warbler! Like the Swainson’s and Veery, the warbler was clearly in migration, on its way to northern breeding grounds in Canada and Alaska. Braden and I had found them three times before in Montana, but always females. Not only did a gorgeous, breeding plumage male now stare back at me, it was the first Blackpoll I had ever found on my own!

**As you can tell, the day proved tough for photography all-around, but I managed to get fuzzy ID photos of my Bird of the Trip, Blackpoll Warbler!**

You won’t be surprised to hear that the Blackpoll Warbler immediately secured Bird of the Trip honors. Even more, it cemented the notion that just because conditions are bad for birders, they can still be great for birds. In fact, storms often cause birds to hunker in place for a day or two—perhaps the reason I found some of the especially cool birds I found today. I plan to remind myself of that the next time I’m debating whether to venture out into the pelting wind and rain.

The Shorebirds of North America (Book Review)

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With spring shorebird migration coming on, we take a break from our Colombian birding series to review a new book that will help prepare you for the exciting, sometimes daunting task of identifying and enjoying some of the world’s most spectacular long-distance migrants. Bird—and read—on!

Legions of FatherSonBirding readers have probably noticed that Braden and I have increasingly become interested—nay, obsessed—by shorebirds over the years. See, for example, our posts

Montana Shorebird Surprise

Abbotts Lagoon, Point Reyes National Seashore (or Chasing Migrants, Part II)

Our fascination may seem odd given that Montana is hardly the world’s epicenter of shorebird activity. Then again, their very rarity here renders them all the more alluring to find and learn about. A natural birding progression also is at work. When beginning one’s birding journey, we birders naturally focus on common, familiar species. As confidence, curiosity, and ambition grow, so does the desire to learn about and identify more difficult groups of birds. When we first began birding, Braden and I focused on woodpeckers, thrushes, waterfowl, waders, owls, and other easier-to-identify species. Over the years, we have plunged into increasingly challenging groups including warblers, sparrows, flycatchers (Braden), gulls, and perhaps more than anything, “shorbs.”

**A flock of Western Sandpipers at Point Reyes during my September visit to California with Scott Callow.**

When out scanning beaches or shallow lakes, the most common phrase Braden repeats to me is “Shorebirds are tough.” This usually happens when I am whining about the difficulty in distinguishing between off-season Least and Semipalmated Sandpipers, or White-rumped and Baird’s Sandpipers—especially at a distance. But many shorbs are relatively easy to identify, and over the years both Braden and I have come to appreciate—nay, savor—the entire breadth of these fascinating, superbly adapted critters. Imagine my joy, then, when a brand new, beautifully photographed book about shorebirds arrived on my doorstep: Pete Dunne’s and Kevin T. Karlson’s The Shorebirds of North America: A Natural History and Photographic Celebration (Princeton University Press, 2024).

*The Shorebirds of North America* by Pete Dunne and Kevin T. Karlson (Princeton University Press, 2024)

To say that The Shorebirds of North America is ambitious would be like calling the 18,000-mile round-trip migration of a Red Knot “neat” instead of “epic” or “mind-blowing.” This terrific addition to birding literature not only gives a wonderful overview of the lives of shorebirds, it provides specific accounts of all the shorebirds likely to interest you. That makes this book a wonderful, highly readable reference for both beginning and advanced birders.

The bulk of the book consists of species accounts of 52 kinds of shorebirds known to breed in North America and my guess is that you, like me, will skip directly to species that happen to interest you at the present time. This is a great approach. One of the first shorebirds I looked up was Black-bellied Plover, a bird I have become more and more enthralled with the past several years. As I started to read, my understanding of this handsome creature immediately swelled. I didn’t realize, for instance, that it is one of the world’s most widely distributed shorebirds, or that it is called Grey Plover outside of North America. What really tickled me was learning how fearlessly aggressive these birds can be:

“On the high Arctic tundra breeding grounds,” the authors write, “this sturdy plover is a fierce protector of its large nest area, and it strikes fear into aerial predators as large as gulls and jaegers. Woe to any flying predator if it hears the whistled alarm call of Black-bellied Plover as it flies swift and low across the tundra before rising to spear the intruder in the belly with its strong bill . . .”

The 4-letter breeding code for Black-bellied Plovers is BBPL. After reading the entry for the bird in *The Shorebirds of North America*, however, I realized that BBPL could easily stand for “Bad-ass-bellied Plover”.

Who knew that one of my favorite birds is such a bad-ass? Similarly delightful “reveals” can be found in each account, many of them based on the authors’ own personal and scientific experiences with the birds.

Far from just being pretty to look at, the book’s incredible photos add real understanding of each species by showing them in a variety of plumages and situations. I enjoyed just quizzing myself on the photos as I made my way through the book, testing and expanding my knowledge as I went. I cannot imagine the effort Kevin T. Karlson and the book’s other photographers invested in creating what may be the world’s finest collection of shorebird photos.

Another thing I learned from *The Shorebirds of North America* is that the bills of oystercatchers are laterally compressed. You can’t tell this from the typical side view, but this compression turns the bills into excellent chisels for prying limpets, snails, and chitons off of rocks.

As delightful as the species accounts are, I strongly urge readers to read the entire first section straight through. In this section, the authors provide excellent perspective on all shorebirds including their remarkable adaptations, habits, diversity, and evolution. Fascinating anecdotes abound, such as the story of B-95, a banded Red Knot known to have traveled more than 400,000 miles during his 21-year lifetime. The authors don’t bother to hide their admiration for these birds:

“Challenged to design the perfect bird, we would without hesitancy delve into ranks of shorebirds and reach down to the Scolopacidae (sandpipers), the largest of the roughly six or seven family groups in the shorebird order Charadriiformes.”

Another fascinating fact I picked up from *The Shorebirds of North America* is that the curved bills of Long-billed Curlews are almost perfectly designed to snatch fiddler crabs from their long, curved burrows. They’re also great for picking off grasshoppers without alerting them to their imminent doom.

I could keep singing this book’s praises, but really, if you have even the tiniest, nascent interest in shorebirds, you should order a copy yourself. Given its length and full-color format, I expected the book to sell for at least fifty or sixty bucks, but at the time of this posting it can be had for a bargain $35. That puts it within reach of most people—and makes it an investment in your birding future you won’t regret.

One-Sentence Summary: A highly-readable, indispensable resource for both beginning and advanced shorebird enthusiasts.

Overall Rating (on a scale of cool birds): Piping Plover (highest)

You can order The Shorebirds of North America from your local independent bookstore, or directly from Princeton University Press. Please tell them we sent you!

(Except for the cover image, photos in this post are copyright Sneed B. Collard III. Review copy of The Shorebirds of North America provided by the publisher.)

Abbotts Lagoon, Point Reyes National Seashore (or Chasing Migrants, Part II)

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After our amazing encounter with Vaux’s Swifts and shorebirds (see our last post), Scott and I had another productive session the next morning at the Ellis Creek water recycling facility and Tubbs Island, both in Sonoma County. As an added bonus, we got to bird with two of Scott’s pals, Steve and Sean. Steve and Scott began birding about the same time and were still in the beginning phases of their birding careers, but Sean grew up birding and taught us all some cool ID features. Most important, he confirmed that the peeps Scott and I saw the day before were indeed Least Sandpipers. With his help, we were also able to identify a couple of sneaky Western Sandpipers that were comingling with the approximately 400 Least Sandpipers in front of us. As much as we enjoyed these sessions, what Scott, Steve, and I looked forward to the next day even more. That’s when we planned to bird legendary Abbotts Lagoon.

**(L to R) Sean, Steve, and Scott investigating the wilds of the Ellis Water recyling plant!**

Abbotts Lagoon sits within Point Reyes National Seashore, and none of us had ever before birded it. However, Braden and our occasional guest contributor, Roger Kohn, had both been there and given it high marks. As we crested the mountains at Point Reyes and drove down toward the coast, I didn’t know what we would find, but held my hopes high.

Reaching the beginning of the lagoon requires a mile or so hike through remarkable dwarf-like vegetation that reminded me of steppe or tundra, probably because fog enshrouded the lands around us. I hadn’t realized we would have to hoof it so far, but I was grateful because we got great looks at many California residents: California Quail, California Scrub-Jays, White-crowned Sparrows, and most exciting, Wrentits. One of these, in fact, popped up no more than fifteen feet from us—unusual for a generally secretive bird. Nontheless, it was the lagoon and beach beyond that propelled us forward and when we reached the lagoon we found . . .

**Though a bit of a hike, the mile-long walk to the lagoon offered a nice variety of songbirds and raptors, including this banded White-crowned Sparrow.**

Nothing.

Well, almost. Instead of vast rafts of shorebirds ripping up the mud, only a couple of wading birds and American White Pelicans could be made out as far as the eye could see. Darn, I thought to myself. But if there’s an, ahem, cardinal rule to birding it is this: You Never Know. So we plowed ahead, following the harder beach sand, and soon came to a little bend where we got great close-ups of three Red-necked Phalaropes and a Pectoral Sandpiper—a bird I recognized only from my hours studying them in Montana. This bird, in fact, was quite interesting because PESAs show up only in small numbers on the West Coast, and generally only in fall. A lifer for Scott and Steve!

These Red-necked Phalaropes and a lone Pectoral Sandpiper were the highlights of our walk around the lagoon to the beach.

Continuing toward the ocean, we spotted two Black-bellied Plovers and a flight of shorebirds in the distance, but it wasn’t until we reached the ocean that we got some real action.

I was just as excited by pelagic bird possibilities as I was by shorebirds, and once on the beach I immediately set up the spotting scope we’d lugged the two miles out there. Like shorbs, I rarely have a chance to observe pelagic birds, and I felt determined to make the most of this rare opportunity. Right away, I saw a number of dark shapes out on the water—shapes that appeared and disappeared on the four-foot swell. Oh man, I thought to myself, I’m never going to be able to figure out what those are. In such situations, I have learned to relax and just hang in there, and that’s what I did now.

From studying before the trip, I came up with several likely possibilities of species that could be out there. These included Common Murres, Pigeon Guillemots, various storm-petrels, and Sooty Shearwaters. In fact, as we arrived, I noticed at least eight medium-sized dark birds swooping low over the water. When they turned, I spotted light patches under the wings. First victory: Sooty Shearwaters.

Then, I saw a larger bird floating a couple of hundred yards offshore. The shape shouted “Loon” and I thought, “Hm, that looks like it has a silvery sheen on its head.” Victory #2: Pacific Loon!

Identifying pelagic birds at great distance can take great patience and not a little skill, but in time, many species reveal themselves. The keys to this Pacific Loon? A silvery sheen on its head, a thinner bill than found on Common Loons, and a thin black “chin strap” or collar around the neck.

After that, it got harder, but I did manage to ID some distant Common Murres by the white around the face and neck, thinner “up-pointed” bills, and longer body lengths. A seabird expert undoubtedly would have found additional species, but as a seabird novice, I felt satisfied. Humorously, as I was looking through the scope, I suddenly saw a whale’s tail emerge behind several of the birds. Did I look up? Of course not! Who has time for pesky mammals when there are ocean birds to be seen!

But let us not ignore the beach itself. As Scott, Steve, and I enjoyed the waves and emerging sun, the shorebirds decided to put on a show. On one side of us, a flock of at least 150 Least Sandpipers landed only a hundred yards away. On the other side, a couple of hundred Western Sandpipers settled down. Talk about your perfect conditions for comparison! In fact, this was my first chance ever to get good, leisurely looks at Westerns and I took full advantage of it.

The beach at Abbotts Lagoon offered by far my best opportunity ever to study Western Sandpipers. Note (if you can) the overall pale appearance and the reddish “shoulder blades” typical of juveniles this time of year. **WESAs also tend to have longer, more curved bills than other peeps.**

You remember that Sesame Street song “One of these things is not like the other?” Studying the Least Sandpipers, I spotted a much paler bird with a thick black bill and black legs. Another peep: Sanderling!

Meanwhile, among the Western Sandpipers, I espied smaller birds with shorter bills and dark collars around their necks—Semipalmated Plovers!

**I was especially tickled to find half a dozen Semipalmated Plovers among the Western Sandpipers. Go plovers!**

To add to the show, a Peregrine Falcon landed on the sand behind us, and on the way back we saw several other raptors including a White-tailed Kite. After Abbotts, we got a delicious lunch at Inverness Park Market, and then headed to Limantour Beach for great looks at Surf Scoters. All in all, it was an awesome day chasing migrants, featuring good birds, good food, and best of all, great company.

Trip Report: https://ebird.org/tripreport/276917

**Compared to the Abbotts Lagoon Beach, Limantour Beach was a bit of a desert, but did offer up three nice Surf Scoters.**

Chasing Migrants, Part I: Swifts, Peeps, and Plovers

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In case you missed our last post, be sure to check out my new book, Birding for Boomers. It’s a great gift for anyone you know of any age or background who might be interested in getting into birds. It’s also a great way to support our efforts here at FatherSonBirding! Why not order one or two copies—or even a dozen—right now?

I’ve had little time to catch up on our birding adventures this time of year. With new books to promote, house guests to entertain, seeing Braden off to his senior year at UMaine, and more, life has been a juggling act through August and September. I did manage two lovely trips to Freezeout Lake in August, one with my occasional birding buddy Steve Flood, the other with Braden right before he headed East. In mid-September, I also rewarded myself with a personal trip to the Bay Area to visit friends and relatives—and, of course, see as many birds as possible. Like the recent trips to Freezeout, my primary objective was to find and study as many migrating shorebirds as possible.

Despite birding for more than a decade, I still feel like a beginner when it comes to shorebirds. My recent trips to Freezeout were “study sessions” more than birding excursions, and I was grateful that Baird’s Sandpipers, Red-necked Phalaropes, Semipalmated Sandpipers and other species offered hours of observation and ID practice on each trip. I hoped for similar sessions in California. After I spent a few days with relatives in Oakland and reconnected with the delightful birds of oak woodlands, my friend Scott (see Eastern Odyssey 24: Return to Westby) whisked me off to the North Bay, where serious birding adventures commenced.

Before heading across the Richmond Bridge, we gave McLaughlin Eastshore State Park in Berkeley a try, but our timing was off as high tide covered the mudflats. Next, we visited the Las Gallinas Valley Sanitary District in Marin County. I enjoyed that, but again, we saw nothing spectacular. I was surprised to spot a lone Vaux’s Swift—a lifer for Scott—and eight or nine Black Phoebes put on a show, but it was a slow start to meeting our birding ambitions. Fortunately, things would pick up—dramatically.

**Though they didn’t perch at the top of our target list for the day, Black Phoebes charmed us at the Las Gallinas water treatment ponds in Marin County.**

After Las Gallinas (“The Hens”), Scott drove us to Reclamation Road in the San Pablo Bay National Wildlife Refuge, where we hoped—finally—for some shorebird action. Our first surprise wasn’t shorebirds, however. As soon as we got out of the car, I spotted four tiny shapes frantically flying west. “Hey, there’s more Vaux’s Swifts.” I really hadn’t expected to see these, but it did make sense. I knew they’d departed Montana in the past few weeks and that they followed the West Coast down to their wintering grounds in Mexico and Central America. Our four birds were merely a prelude, however. As Scott and I walked out toward the shore, we saw half a dozen more swifts. Then a dozen. Then, as we looked east, we witnessed a veritable river of Vaux’s Swifts flying toward us.

**This photo doesn’t begin to capture the remarkable river of migrating Vaux’s Swifts that passed over our heads.** Yes, those “dots” are the swifts! Swifts are a species of concern because of the loss of old growth forests and other natural roosting sites. Ironically, saving old brick chimneys should be a priority for those interested in protecting these birds.

“This is amazing,” Scott said as the birds stiff-winged it over our heads. “Have you ever seen anything like this?”

I shook my head. The most VASWs I’d ever seen at one time was perhaps a couple of dozen. Now, hundreds streamed past us—probably thousands! We learned from a passerby that they were most likely heading to the chimney of an old brick-making plant, a well-known roosting place for them. Scott and I were suitably awed by the sight. It was enough to make the whole day worthwhile, whether or not we ended up seeing shorebirds.

Nonetheless, as we walked out to the bay I was gladdened to see shallow mudflats and hundreds of dots scattered over them. “Shorebirds!” I rejoiced.

With San Francisco in the distance, you couldn’t ask for a more dramatic setting to study shorebirds! Many of those specks in the foreground are Least Sandpipers—though you’ll see a lot of other species mixed in!

As we drew closer, I set up the spotting scope, and quickly zoomed in on a dozen-plus Long-billed Curlews, at least fifty Willets, and what would turn out to be a couple of hundred Marbled Godwits. These were easily-enough identified. Not so the hundreds of small sandpipers, or “peeps,” that peppered the scene in front of us. Birders generally include four species under the “peep” category: Sanderlings, Western Sandpipers, Semipalmated Sandpipers, and Least Sandpipers. Since it was the nonbreeding season, Sanderlings should have given off a distinctive whitish vibe by now, so I ruled them out, but what of the other three? The problem with peeps is that their coloration, size, bill shape and bill length overlap to a frustrating degree, and I just didn’t have enough experience with these to make a call. Least Sandpipers can be easy to pinpoint if you can see their leg color—yellow compared to black for Westerns and “Semipalms”—but when they were feeding in the mud, determining leg color often proved impossible.

As I often do in such situations, I called Braden. I described what I was seeing and said, “I am guessing that they are Semipalmated Sandpipers, but I just don’t know.”

“Well,” he informed me, “the good news is that if there are large numbers of them, they aren’t Semis because Semipalmated Sandpipers don’t move through the West Coast.”

**With Braden’s help, I narrowed down these far-away “peeps” to either Least or Western Sandpipers. Confirmation would have to wait until later, however.**

Doh! This surprised me because we do see them in Montana. I never realized, though, that our Montana birds were on the western edge of their migration pathway from their northern breeding grounds to their wintering grounds in the coastal tropics.

“If I had to guess,” Braden continued, “I’d say you’re looking at Least Sandpipers. You said that they’re darker brown and Westerns give off a grayer color.”

Still, even through the scope, the birds were too far away for me to be sure, so I recorded “peep sp.” in my eBird checklist—at least for now.

One species, however, excited me more than all the others. Almost as soon as we reached the mudflats, I spotted birds that I had especially hoped to see: Black-bellied Plovers. Black-bellied Plovers are one of the world’s largest plovers, and they have the widest distribution. Like many shorebirds, they breed mainly in the arctic regions, but in winter they disperse to coastal areas of every continent sans Antarctica.

**At San Pablo Bay NWR, I was especially excited to see Black-bellied Plovers mixed in with Long-billed Curlews, peeps, Marbled Godwits, and other shorebirds.**

Braden and I had only ever seen Black-bellied Plovers about twenty times—and only four times as they migrated through Montana. The birds are known to flock up in winter, but even in places such as California and Texas, we generally only saw a few at a time. Now, as I trained my scope out over the mudflats, I began picking out more and more of these birds. At first, their light color and larger size made them look kind of like gulls, but their more erect posture and stubbier dark bill gave them away. One bird they can easily be confused with are American Golden Plovers, which look almost identical except for their smaller bill, head, and overall size. Some AGPLs also show flecks of gold color even in winter, but today, I saw no AGPL suspects and counted sixty Black-bellied Plovers in front of me.

“I don’t think I’ve ever seen this many before!” I effused to Scott. “This is really amazing.”

What I didn’t realize is that I vastly undercounted. I took a couple of photos of shorebirds in flight and later, going over the images, I made a startling discovery. One of the flying flocks consisted of at least 140 Black-bellied Plovers! How could I tell they were BBPLs instead of other shorebirds? In this case, it happened to be easy. Black-bellied Plovers are the only shorebirds to show distinct black armpits under their wings!

**When I took this photo, I didn’t realize these birds were Black-bellied Plovers—easily the largest flock I have ever seen. The black armpits make IDing this species particularly easy in flight.**

It was a great way to end the day for both me and Scott and we celebrated with a fabulous Mexican food dinner with Scott’s wife Ginny and step-daughter Hayley. I went to bed happy—but eagerly looked forward to more migrating bird opportunities ahead.

https://ebird.org/checklist/S195291789

Montana Shorebird Surprise

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We’re sharing our most recent birding adventure in reverse order. The day before chasing the wily White-Tailed Ptarmigan, Braden and I had an incredible outing at Benton Lake National Wildlife Refuge (see also The Best Prairie Day Ever). Normally a go-to place for grassland birds and waterfowl, Benton didn’t seem likely for the birds we most wanted to see—shorebirds. Were we in for a surprise! Here’s Braden’s report.

Visiting the Pacific Ocean this summer and having several great days of birding there did nothing but increase my drive to find shorebirds. Between Monterey, the Bay Area and Point Reyes, I had seen species like Red Knot (my lifer), Black and Ruddy Turnstones, Red and Red-necked Phalaropes, Short-billed Dowitchers and more. Now, I was ready to see these and other species during my short stay in Montana before heading back to college in Maine. However, seeing shorebirds along the ocean, where there were miles and miles of great habitat for thousands of birds to choose from, was one thing. In Montana, shorebirds were often hard to find, even during their peak migration in August and September. Two autumns ago, my dad and I had birded hard, visiting the Ninepipe Valley half a dozen times as well as Helena and Three Forks in a quest to find shorebirds. While we had found most of our target species eventually (including finding Baird’s and Pectoral Sandpipers a handful of times and Western Sandpiper once), we found very low numbers across the whole season and missed our main target species, American Golden-Plover. This was fairly normal for Western Montana.

This year, on our way to Glacier National Park for an entirely different bird (see In Search of the Wily White-tailed Ptarmigan), my dad and I decided to seek shorebirds at refuges along the Rocky Mountain Front. I’d seen several reports of large numbers of Stilt Sandpipers at Freezeout Lake in past Augusts, and so we thought maybe we could find some of them there. And so, two days after I arrived home from California, we woke up at four in the morning and headed for Great Falls.

Unfortunately, we didn’t find that much at Freezeout. A few yellowlegs and Solitary Sandpipers picked the mud along the shoreline of the ponds, and we ran into a small flock of Baird’s Sandpipers right at the end of the driving loop. Overall, the refuge—famous for its spring Snow Geese—had been disappointing. However, that didn’t really matter given that we had gone to Benton Lake National Wildlife Refuge first.

**As soon as we arrived at Benton Lake, flocks of Baird’s and (probably Greater) yellowlegs greeted us.**

Benton Lake normally did not seem to have good shorebird habitat. Every May, when we would come here to get our Upland Sandpipers and Chestnut-collared Longspurs for the year, we would drive by cattail marshes and open grasslands—not mudflats. The drought in the West this year had been changing everything, though. Bowdoin, one of the best refuges in Montana, had such low water levels that ducks were hard to come by. At Ninepipe National Wildlife Refuge, the ponds on Duck Road had disappeared by May. The upside? Some lakes that previously had been terrible for shorebirds suddenly had extensive mudflats filled with millions of tasty invertebrates for these arctic migrants to feed on. Which is what happened at Benton Lake.

With high numbers and some close approaches, Baird’s Sandpipers proved to be the highlight of our Benton Lake shorebird extravaganza. Baird’s are larger than peeps (though some people group them together), and are identified by their black legs, robust breast markings, medium bill, and wings that extend out over the tail.

In fact, as soon as we arrived at the first pond, a large flock of small shorebirds lifted off from some distant mud, speeding over another flock feeding in the shrinking lake. My dad set up the spotting scope and we quickly determined that both of these flocks were primarily composed of one of Montana’s most common fall shorebirds, Baird’s Sandpipers. As we scanned these favorite sandpipers, we marveled at how much individual variation there was within each group. Though every bird was of the same species, each differed slightly in color, size, shape or bill length, allowing us to learn about what features confirmed a bird as a Baird’s. Soon, I noticed several more Baird’s on the shoreline next to us less than ten feet away, allowing us to get even better views and great photos. However, Baird’s were not the only species out on the mudflats. During my scan of one of the more distant flocks, I spotted a taller sandpiper, with a longer, more curved bill and thick supercilium.

“Stilt Sandpiper!” I yelled, and my dad was able to glimpse the species before the whole flock took off again. That same flock held a few peeps that I struggled to identify, debating whether the bills were long enough for Westerns or if the colors were right for Least or Semipalmated. Despite having some practice with peeps, they always manage to confuse me.

We moved on to the next pond, where more shorebirds waited. More Baird’s flew circles around us, and we spotted a huge group of dowitchers lifting off in the distance, complete with both species of yellowlegs. Solitary Sandpipers foraged on the shore, alongside Killdeer and a few Leasts. Near the end of the final lake, I spotted two Pectoral Sandpipers, another one of our targets, picking invertebrates off the rocks right next to the car alongside our only Wilson’s Snipe of the day! We’d never had better looks or photos of any of these species, and never in these high numbers! At least the drought was creating some good.

Right along the road, we got our best looks ever at several species including this cooperative Pectoral Sandpiper, distinguished from Baird’s by its yellow legs, larger size, and more extensive and abrupt cutoff of markings on its breast.

Our most astounding discovery happened as we were picking through another flock of Baird’s Sandpipers, searching for something unusual. As I looked up, I spotted three striking black and white birds flying towards us, and my heart rate jumped. They landed a short distance away, and I stared at them through my binoculars: three Black-bellied Plovers, still completely in breeding plumage! While we’d seen these birds in Montana in previous years, we’d never had such an experience with their breeding colors! They hadn’t been on my radar at all, either, though perhaps they should have been.

**Black-bellied Plovers weren’t even on our radar, so imagine our delight seeing three fly in—and in full breeding plumage!** **(Note the Baird’s Sandpipers next to them.)**

My dad and I had finally done it. This was the shorebird experience we’d been hoping to have in Montana for years, and Benton Lake, not any other famous shorebird hotspot, had been the place to provide it for us. The next day we’d leave the prairie behind and head for the mountains of Glacier, though hopefully our year of shorebirds wasn’t quite through!