There are several moments each year when I find myself out on a lake at night during capture season and suddenly think I must be insane. One such moment occurred at about 2 a.m. last night in Minnesota. Richard was driving the motorboat; Owen and I were perched in the bow scanning for loons. We swept the spotlight back and forth, back and forth across the dark surface of East Fox Lake. But we spent very little time in contact with loons. Our spotlight mostly caught dense, swirling tendrils of fog hanging in the air. Occasionally we broke free from this suffocating cloud for short intervals and the spotlight suddenly gave us an unobstructed view of 100 yards in every direction. Fortune was not on our side, however. We saw no loons in parts of the lake that were free of fog.
Loon capture — even loon-spotting — seemed highly improbable under these circumstances. I looked back at Richard behind me and Owen to my left. Their presence somehow reassured me that what we were doing — trying to locate a family of diving birds in total darkness and pea soup fog on a 241-acre lake so that we could lure them close to the boat with imitated calls and scoop them up in a muskie net — qualified as rational behavior. We searched on, fruitlessly. “Kill the motor Richard”, I said finally. “Let’s try playbacks.” Yet the loon pair at East Fox-South and their two 7-week-old chicks did not give away their position by vocalizing in response to our crisp recordings of wails from Maine and yodels from Michigan. Maybe it was regional bias.
We continued stalking the silent loon family. I directed Richard to steer right or left, so as to remain within the loon pair’s favorite part of the territory. Fifteen, twenty minutes passed. As our hopes of finding the family were beginning to fade, we caught sight of two black loon heads ten yards apart, partially obscured by a fog bank. “We need the unbanded male”, I reminded Owen. “Okay”, he whispered good-naturedly. With the two adults separated, we could not determine which was larger, forcing a split-second decision. Owen spotlighted the nearer adult. As we drew close to the bird, however, we realized our mistake. “Banded!” we both shout-whispered simultaneously. Owen swiveled the light quickly to the male we wanted. We crept up to him, while I imitated the scratchy whistled call of chicks in an effort to freeze him on the surface. At first, we were hopeful. The male did not shrink from the spotlight, as many loons do, and he was interested in the chick call. Alas, though, he was an unpredictable diver. He remained near the surface where Owen could track him with the spotlight, yet he swam first at — then underneath — the bow of the boat. I could not get the net in the water to catch him. After a minute or so, he vanished into the mist.
Moments later, the female wailed to our left. “Let’s go for her”, I told him, and soon after I had scooped her into the boat and — with Richard’s help — Owen had tucked her neatly into a padded, ventilated box. “Maybe the male will find the chicks”, I said hopefully. It was a reasonable expectation. We had seen the sole parent seek out the chicks many times before, once we had removed its mate from the water. And an adult swimming with its chicks is usually highly protective of them and less apt to dive. But we did not blunder into the male and chicks after that first encounter, despite 20 more minutes of puttering around in a cloud.
We gave up, motored to shore with the female, took a feather sample and blood drop, weighed her, and released her off shore. It had been a frustrating middle of the night boat ride on East Fox. We had failed to catch the bird we had targeted on the South territory. Yet we had banded four new chicks earlier in the evening — including two on socked-in East Fox Lake — and recaptured three adults. That brought our two-state tally to 40 unmarked adults newly banded, 88 chicks banded, and 27 adults recaptured. Looking back, we had quite a lot to show for our labors this July, considering that we face variable weather conditions, unpredictable study animals — and engage in an enterprise that seems to verge, at times, on outright insanity.
Pictured are Cora from the Minnesota team and Korben from the Wisconsin team.