Tag Archives: Citizen Science

Welcoming White-crowned Sparrows—with Observer Bias

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FatherSonBirding is a totally free, non-commercial blog that Braden and I write to share our passion for birds and birding, and to help educate others about birds and bird conservation. We do not accept donations, but if you would like to support us in our endeavors, please consider purchasing *new copies* of one or more of Sneed’s books—the new picture book Border Crossings, for example. These books are widely available online or can be ordered from your local independent bookstore. Oh, and they make great holiday gifts! Thank you for your support.

In previous posts, we may have mentioned that when we first began birding, Braden and I pretty much ignored the fall. Once spring migration and breeding petered out, we figured, how exciting could it be? The answer, we’ve learned, is: Plenty! In past posts, Braden and I have focused on fall shorebirds, but in the last couple of weeks alone, I’ve also watched waves of Savannah Sparrows, Yellow-rumped Warblers, American Pipits, Ring-necked Ducks, and a whole slew of raptors cascading through Montana. This fall, I’ve especially been impressed by White-crowned Sparrows.

In their adult, or definitive, plumages, White-crowned Sparrows show bold black and white striping on their heads. In fall, however, most of the birds you’ll see sport sub-adult or “1st winter” attire (see below).

If you live in California or parts of the Great Basin, you probably don’t give White-crowned Sparrows much thought. After all, you can see them all year round, and they may even be the most abundant native sparrow you encounter. The same goes for much of the rest of the country, where White-crowned Sparrows overwinter, basically from coast to coast.

Here in Montana, it’s a different story. In spring, White-crowneds zoom through the state on their way to our high mountains or far north Alaska and Canada to breed. Our most impressive encounter? Watching a male singing to high heaven on its breeding territory in Glacier National Park (see our post, “Are You Ready for the Quach?”). Our best chance at seeing them, however, is in the fall, when they saunter through at a more leisurely pace.

Not only have I seen a LOT of White-crowned Sparrows this fall, they have been extremely cooperative in striking fetching poses.

Scientists recognize at least four sub-species of White-crowned Sparrows, and choose them as a favorite research animal both because of how common they are, and how easy they are to keep in captivity. Many studies have focused on song learning in the birds, and it seems that different populations, like humans, learn different dialects based on what they’re hearing around them. Researchers even talk of “bilingual males” that live on the borders between different populations. Breeding males aggressively defend their territories by flying at intruders, puffing out their feathers and crests, and singing loudly. They may even “wrastle” with their feet—a sparrow’s version of Brazilian jiu-jitsu!

Each fall, I usually see White-crowneds in a couple of different locations around Missoula, including a skulky adult that often shows up for a day or two in our backyard. This year, though, it seems I’ve been seeing White-crowned Sparrows almost everywhere I look. In September alone, I recorded seven sightings of White-crowneds. I was sure this must be some kind of personal record, and it led me to believe that these delightful songbirds might be having an especially great year.

Not so fast.

At one of our favorite birding spots, the Missoula Gravel Quarry, White-crowned Sparrows seem drawn to an abundance of seed that will help them fatten up for the rest of their migrations.

One of the wonderful things about eBird is that you can quickly go back through all of your species observations for a particular place and/or time of year. Searching through my White-crowned Sparrow records, this is what I found:

2015: 1 sighting

2016: 0 sightings (our ABA Big Year!)

2017: 8 sightings

2018: 4 sightings

2019: 11 sightings

2020: 18 sightings

2021: 14 sightings

2022: 5 sightings

2023: 11 sightings (so far)

At first glance, you might think this data reveals good and bad years for White-crowned Sparrows. Alas, that may or may not be true. Why? For the simple reason that my birding effort also has its “good” and “bad” years. You’ll note that by far my biggest year for WCSPs was 2020. Well, guess what? That’s the year Braden and I were doing our Montana Big Year, trying to find as many species as possible in our state from January through December. It was the year we most likely spent the greatest number of hours and days birding here, and so it’s no surprise that our White-crowned Sparrow sightings peaked that year.

“Are you lookin’ at me? Are you LOOKIN’ at ME??? Well, if you want this observation to be useful for science, you’d better look HARDER and more consistently.”

If we really wanted to start getting a handle on good and bad years, we would have to introduce some consistency to our birding madness by sampling spots at the same times and same locations throughout the year or season. This, in fact, is one way scientists study bird populations. They return to places at the same times and for the same durations every year. Braden spent this past summer doing “point counts” for songbirds in eastern Pennsylvania. He visited locations (“points”) that other field biologists had sampled in past years and at each point, he looked and listened for ten minutes, recording all of the birds that he detected.

I have done a similar thing in our own neighborhood, but on a much more informal basis. From spring through fall, every weekend or two, I walk our dog Lola on a particular neighborhood route at about the same time of day, recording all the bird species I detect. I call the route “Old Pond Road” and here are this year’s results (also see our post “Best Fall Warbler Flock Ever!”):

May 14: 18 species

June 3: 14 species

June 24: 20 species

July 1: 16 species

July 9: 16 species

July 15: 12 species

July 23: 12 species

August 12: 10 species

August 27: 21 species

September 5: 5 species

September 10: 11 species

September 16: 8 species

September 24: 8 species

September 30: 12 species (this morning)

I am the first to admit that this is not a rigorous study. I birded at different times of the morning, put in varying amount of effort—and I have lousy ears, so I’m definitely not hearing everything that’s around me. Still, you can see some interesting patterns. Species numbers came on strong in the spring breeding season, slumped in mid-summer, and then hit a high for the year in fall migration. Now, as the passerines (songbirds) have mostly passed through heading south, things are settling down to those hardy year-round residents that can handle a Montana winter.

“Just checkin’ out the photographer before I get back to eating!”

I encourage all of you to start your own neighborhood bird studies. Even with my rather haphazard approach, my data may come in useful to a scientist one day. Just as important, this study has taught me a lot about the birds living in my neighborhood—and it will for you, too. To begin, you’ll want an eBird account, of course. After that’s set up, though, just pick out a favorite route and begin birding it at about the same time every week or month. In no time, a year or two will pass and you’ll be able to look back on some interesting results that will teach you and help you appreciate this remarkable world around us.

As for the White-crowneds, I will continue to be glad to see them and will welcome them back any time—whether or not they’re having a particularly good year.

Fall Birding in Glacier National Park

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Last week, after speaking at the monthly meeting of Flathead Audubon (see post “Birding with the President”), I spent the night with my gracious hosts, Darcy and Rob Thomas, and rose at 5 a.m. for a birding excursion to Glacier National Park. Powered by an egg and sausage burrito from City Brew, I made it to the park by 7:00 and rumbled and bumped my way up Inner North Fork Road. Braden, Nick Ramsey, and I had been here only five weeks before on a quest to find me a Lifer Spruce Grouse, and guess what? I was still on that quest! Today, though, I decided to try a different route, the Camas Creek Trail that leads east toward the heart of the park. I arrived to find the little parking area totally empty and, after strapping on my fanny pack, and slinging my camera and binoculars over my shoulders, set out under a dawn sky.

Sunrise at Camas Meadow. Need I say more?

Entering a patch of woods, I walked quietly and raised my senses to full alert. I didn’t want to scare away a Spruce Grouse along the trail, but I also wanted to spot a grizzly bear before it spotted me! Of course, park officials recommend hiking noisily to alert bears to your presence, but for birders this obviously is a counterproductive strategy. Bear spray would probably have been a good idea, but as usual I forgot to bring any. Within a quarter mile of the trailhead, however, I got a good scare.

I was rounding a bend with some trees on the right when suddenly a large shape launched from a branch and spread enormous gray wings. Owl! my brain shouted as my heart hammered, but which kind? The park contained only two large-owl possibilities: Great Gray and Great Horned. I hurried forward, trying to see where it was headed, but failed miserably. Without ever facing toward me, it disappeared through some trees, never to be seen again. My gut and the length of the owl’s wings tells me it was a Great Gray Owl but I will never know. Sigh.

After that startling start, my hike settled down. I reached Camas Meadow just as the sun began peeking over the Continental Divide and savored being absolutely alone in one of the world’s most beautiful places. I got here so early that the birds were off to a slow start. I saw a few flitting around, and Merlin’s Sound ID feature informed me that they were Pine Siskins and Yellow-rumped Warblers. It also told me that the chickadees I was hearing were Mountain Chickadees. Other than that, the action languished.

Despite this rather poor image, one of the highlights of my Camas Meadow trail hike was the abundance of Yellow-rumped Warblers fattening up for migration.

Fortunately, that held true on the grizzly bear front, too. I passed some scat, but it looked like black bear poop (smaller, full of berries, less messy), and was old to boot. In fact, I passed few fruiting plants relative to other places I’d recently visited in western Montana—a fact that might bode poorly for possible grouse sightings.

I hiked for about two, two-and-a-half miles, before pausing for a drink of water and, reluctantly, turning around. Fortunately, as I began retracing my route, rising temperatures seemed to lead to greater bird activity. Most impressive were the number of Yellow Warblers. I tallied at least 30, but am sure I undercounted. Their chips sprung from many locations, and I also spotted a couple of Ruby-crowned Kinglets (one boldly displaying its red crown), Dark-eyed Juncos, and Pine Siskins. An occasional Northern Flicker called sharply overhead.

I was surprised to spot this Red-naped Sapsucker in Glacier. I hadn’t realized they hung around Montana quite so long!
What would the world be like without Northern Flickers? Not a place I want to live in!

About halfway back to the car, I saw a small brown bird flitting about in a bush. Its furtive skulking behavior distinguished it from the other birds I’d been seeing, so I stopped and raised my binoculars, waiting for a clear look. It took a few moments, but it finally showed itself—a Lincoln’s Sparrow! One day, Braden and I will have to list our Top 10 Favorite Sparrows, but for me, Lincoln’s is Number One. Not only does it display a gorgeous, subtle color palette, it seems to have a more curious, delightful nature than other sparrows. When Braden and I began birding almost a decade ago, a Lincoln’s Sparrow was the first sparrow that really made a big impression on me. We devoted several outings to the chase before finally seeing one, so maybe its uncommonness also has something to do with my ranking.

This delightful Lincoln’s Sparrow captured “Bird of the Hike” honors for my visit to Camas Meadow.

After spending a few minutes with Mr. Lincoln’s, I continued hiking. A Red-naped Sapsucker surprised me. Then, I heard a series of eerie whooping noises that reminded me a bit of an Osprey. “What the heck?” I muttered. Then I saw it: a Canada Jay swooping in for a landing high in a nearby tree. A couple of other CAJAs also appeared. The jays, one of my favorite corvids, always delight with their antics and these provided a great way to wrap up my hike. Yes, I had once again missed a Spruce Grouse, but I’d gotten a good sense for what’s going on with the birds in Glacier this time of year. That was invaluable knowledge in my continuing education as a birder. It also happened to make a real contribution to science in the park.

I had no idea what was making that eerie looping call—until I saw this Canada Jay fly to a nearby treetop.

Returning home, I looked up how many eBird checklists have been posted for Camas Creek Trail in the fall. To my astonishment, mine was only the second ever checklist for September! (The other list, from later in the month, noted only three species.) A couple of lists have been posted later, but my own provides the only eBird data for this interesting time of year. Now I know this sounds like boasting, but I mention it to emphasize two important facts:

  1. Even though birding has been around a long time, HUGE gaps remain in what we know about almost every bird species, its movements, and habits.
  2. Your citizen science contributions matter. Sometimes it’s a pain or inconvenient to post what you see on eBird, but you just never know when you will be providing crucial information to a scientist or policy expert wanting to learn something new or make an important decision.

And really, could it get any better? Contributing to knowledge while being out having a great time? I don’t think so. Just keep an eye out for those grizzly bears.