Laura Erickson's For the Birds

Tuesday, October 7, 2014

One Special Warbler

Yellow-rumped Warbler
All these photos were taken through the glass window.

During any migration fall-out, it’s easy to get overwhelmed by the sheer numbers of birds. I described a huge songbird migration from when I was counting at the Lakewood Pumping Station in my 1994 book, For the Birds:

October 1, 1988, was the closest I’ve ever come to wishing I’d never see another robin or warbler… Our five-hour total … was 95,948 migrants, including 62,707 robins, 29,330 warblers, and a smattering of longspurs, siskins, crows, ravens, geese, eagles, etc. If Kim [Eckert] could have stayed [for the entire time], we would easily have topped 100,000. When I got home, still in a daze, I walked smack into a bag of sunflower seeds. Sweeping them into a dustpan, I reached 738 before I realized I was still counting.

This past week, Karl Bardon and Steve Kolbe, the official counters at Hawk Ridge, counted in just three days 43,543 robins, 7,811 Rusty Blackbirds, 405 flickers, and over 4,000 warblers. 

Whenever we are dealing with huge masses of birds, or even of people, we start thinking in terms of masses or hordes, and it’s easy to forget that even the hugest crowds are made up of individuals. But on Monday, one special Yellow-rumped Warbler reminded me of just how unique and individual each bird is.

Yellow-rumped Warbler

On October 6, I brought my mother-in-law to Port Wing, Wisconsin, for her biweekly card club at the house of one of her friends. I spent most of my time on a birding walk. The game took longer than usual, so when I got back to the house, I spent a half hour at the window watching at least six Yellow-rumped Warblers trying to find food on the deck. 

Several of them kept flying up to the windows—not colliding, but picking at insects in the framing and occasionally trying to get some of the cluster flies that had erupted on that sunny day. Most of the houses along Lake Superior get these cluster fly outbreaks during sunny fall days. I’m not sure where the flies come from or why the outbreaks are always indoors—these are not the same species as the iridescent houseflies or bottle flies drawn to garbage. The flies always gather at windows, and the warblers could see the movement, but unfortunately it was mostly on the wrong side of the glass. They’d make a swipe or two, and sometimes managed to grab one that was working its way outside from the bottom of the window, but then they’d spot a bug somewhere else—on the grill, the deck flooring, or in flight—and take off after that one.

Usually I’m a live-and-let-live kind of person, and so when cluster flies gathered at my mother-in-law’s house, I’d open the window and screen and send them off. But those hungry warblers made me lose all compassion for the poor flies—suddenly they were nothing more than food, and I found myself swatting at them. I’d scoop up a dozen or so and put them in a flower box on the deck. Some of the flies were merely stunned, and when they took off, one or another warbler would notice the movement and snap them up in midair. But one little warbler took notice of the fact that the flies were taking off from the flower box whenever I went over there. Within a few minutes, it was flying into the box and gorging on flies the moment I went back indoors.

Yellow-rumped Warbler

Yellow-rumped Warbler

Yellow-rumped Warbler

These little yellow-rumps started off in the Canadian and northern Minnesota wilderness, and are headed to the southern states and some all the way to Central America. Between their summering and wintering grounds, they pass through a lot of unfamiliar habitats. Every single one of them will have to fly over Interstate 80. They take off in the dark and fly all night, and at the end of an exhausting flight can find themselves in all manner of unexpected places, from big cities to Iowa cornfields. And wherever they find themselves, these strangers in a strange land, they must figure out how to deal with the unfamiliar or they'll die.

Many people think of birds as avian automatons, following instincts rather than reasoning, but as that adaptable little yellow-rump showed me, these birds are more intelligent than one would think. I felt sad leaving—if I’d had my druthers, I’d have spent the rest of the day swatting flies and bringing them outside. Other warblers would have made the connection to me, or followed the example of the smart little one, and soon at least six yellow-rumps would have had enough protein to rev them up for the night’s migration. But instead, all I could do is wish them, especially one endearing and unique little bird, a safe journey.

Yellow-rumped Warbler
Safe journey, little fella! (Well, this is probably a female.)