Category Archives: Montana

Irruption!

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This year, there are more Evening Grosbeaks than ever at our feeder–but still nowhere near the amount we saw our first year of birding. (photo by Braden Collard)

Braden here.

During our first year of serious birding, my dad and I thought Evening Grosbeaks were common. Every day in fall, if you just walked the block from our house to Rattlesnake School, you would be amazed at the numbers of these boisterous finches gathered there. There were hundreds, maybe even a thousand of them in their drab fall plumage, tearing apart any pinecone unlucky enough to be spotted.

Two years later, during our first major Big Year (which you can read about in my dad’s fall book Warblers and Woodpeckers: A Father-Son Big Year of Birding), we saw only two individuals: a pair we briefly glimpsed up Pattee Canyon while staking out an American Three-toed Woodpecker nest.

How is it possible that we saw tons one year and only 2 another year? Irruption.

Red Crossbills are another boreal finch that has irruption cycles. (photo by Sneed B. Collard III)

When I say irruption, I’m not talking about a misspelled version of the thing happening in Hawaii right now. An irruption is a mass migration of birds (in this case) to a different area, generally south. Finches are the main type of group that has irruption cycles, but many birds that winter in the U.S. and southern Canada, such as Snowy Owls, Rough-legged Hawks, Bohemian Waxwings and Northern Shrikes also irrupt. Irruption almost always results in large numbers of birds appearing in areas where they normally aren’t, however it isn’t historically unusual.

One of the main reasons for irruptions is food supply. For example, when there aren’t enough rodents to go around up north in winter, Snowy Owls will generally move south into Northern U.S. states. Sometimes, if the shortage is extreme enough, the northern birds will extend their ranges past their usual limits and end up in places that are unheard of. During a major Snowy Owl irruption year, for instance, Snowies were found as far as Texas and Hawaii.

Irruptions can occur due to food abundances, too. The year before we experienced the Evening Grosbeak overload probably had pairs producing higher amounts of young than usual. The next year, the young had nowhere to go, since all of the territories up north were filled, so they moved south into Missoula.

While not as big of an irruption year as before, this year’s Evening Grosbeaks are costing us plenty in bird seed! (photo by Sneed B. Collard III)

This year and last year haven’t quite met that first year’s standards yet, but it has seen crazy irruptions for tons of finches. Last winter kicked off with large numbers of grosbeaks and Pine Siskins, while this year Common Redpolls, Cassin’s Finches and (yet again) more grosbeaks are stealing the stage. Who knows what will show up next?

 

Celebrating Sapsuckers

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When each calendar year begins in Montana, Braden and I always wonder which birds we’ll see—and which we’ll miss. Many species are gimmes. For others, we really have to luck out. Then there’s a whole column of birds that lie in between these two extremes. For us, sapsuckers are in between.

Red-naped Sapsucker at Lee Metcalf NWR (photo by Braden Collard)

We have two kinds in Western Montana: Williamson’s and Red-naped. Both are migratory so we’re never sure when they’ll show up. This year, we just happened to make our first real effort at finding them on Earth Day, April 22. We headed to Pattee Canyon, a place we’d had good success with woodpeckers before, and followed our dog Lola up the mountainside.

At first, results were disappointing. For the first fifteen minutes, the only bird we spotted was a solitary robin. As we began discussing what the problem might be, however, we suddenly heard a loud, throttling, dribbling, drumming sound. Braden and I spun toward it.

“That sounds like a sapsucker!” I exclaimed.

“It sure does!” said Braden.

But what kind? Though we can pick out sapsucker drumming from that of other woodpeckers, we haven’t yet learned to distinguish Williamson’s from Red-naped—and we’d seen both up Pattee Canyon. Moments later, however, we got our answer.

Williamson’s Sapsucker bring ants to babies (photo by Sneed B. Collard III)

“Williamson’s!” Braden shouted as a boldly-colored male flew from one ponderosa pine to another. Within moments, we were immersed in a sapsucker extravaganza. We heard drumming from three different directions. Then, we saw two males squabbling over a female. It was by far our most spectacular sapsucker experience ever.

The next morning, we picked up Braden’s birding buddy, Nick Ramsey, and headed to what has become our favorite local birding spot, the gravel quarry. Though a chilly forty degrees, the sun cast a spectacular light over the Missoula Valley, and the birds did not disappoint. Within half an hour, our day count passed thirty species including a slew of other “In-between Birds” such as Sandhill Cranes, Common Loons, and Horned Grebes. As we walked along the Bitterroot River, however, fresh sapsucker drumming again startled us. We hurried forward and within seconds, Nick raised his camera and said, “I’ve got a Red-naped!”

Red-naped drumming on a Wood Duck box. The Wood Ducks paddled nearby, looking none too pleased! (Photo by Sneed B. Collard III)

For the next hour, we enjoyed a veritable Red-naped convention, hearing and seeing at least four or five of the birds, obviously flush with courtship fever. The only sapsucker day that could rival it? Our previous day with the Williamson’s! We finished our two-hour session with more than fifty species, including a dozen Year Birds.

In-between Birds rock.

 

Woodpeckers: Drilling Holes and Bagging Bugs by Sneed B. Collard III (Bucking Horse Books, 2018)

(To learn more about sapsuckers and other woodpeckers, check out my new book, Woodpeckers: Drilling Holes & Bagging Bugs!)