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Loon Magic - Wayzata Technology (8011) (1993).iso
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07northe.txt
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1993-07-25
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Welcome to Paradise
The eastern end of Lake Superior is an ideal place to study
migrating common loons. Imagine seeing a thousand common loons
in a single day. Volunteers at the Whitefish Point Bird Observatory in
Michigan's Upper Peninsula don't have to: they counted 1,882 loons
on May 8, 1982. In the peak hour of 8:00-9:00 a.m., volunteers
recorded 740 flying loons. One hour. According to David Ewert,
coordinator of the annual count, 4,838 loons were observed at the
site between April 23 and June 6 with seventy percent of the total
sighted during the four-day period of May 7 to 10.
Whitefish Bay on the "big lake" is a natural loon funnel. Nearly all
of these loons are northbound birds. Before passing Whitefish Point,
these loons may leave favorable feeding and resting areas in
northern Lake Michigan or Huron. Departures of loons from these
areas an hour or two after sunrise would account for the heavy flow
over Whitefish Point in the 6:00-10:00 a.m. time period. Research is
continuing at Whitefish Point to pinpoint the migration pathways.
The work of Ewert and other volunteers has generated some
valuable migration data. While most loon observers refer vaguely to
loons migrating alone or in small groups, Ewert gives specific
information. Of 180 random observations of passing loons, the
Whitefish Point volunteers recorded 104 individual birds, thirty-
seven groups of two, twenty groups of three, ten groups of four, five
groups of six, and four groups of between eight and eleven loons. The
mean size of migrating groups was 1.91. Counting gets tough, Ewert
recalls, on those days in May when loons pass in an "almost
continuous stream."
Looking at a number of possible weather variables, Ewert found no
strong relationships between wind direction or speed, cloud cover,
temperature or barometric pressure and loon migration patterns. In
contrast to other published reports, he did see loons flying against
strong headwinds. Heavy rain or fog, however, apparently puts loons
down. The Whitefish Point volunteers saw little or no migration
activity during periods of heavy rain or dense fog. During light rain
or moderate fog, loons appeared to fly at lower heights than during
clear weather conditions. Loons generally fly higher over land than
water. At inland sites in New York, Paul Kerlinger located loons by
radar at altitudes of 7,000 feet, their ascent presumably aided by
thermal currents.
Even for permanent residents of loon country, seeing a thousand
loons is probably the work and pleasure of a lifetime. Seeing a
thousand loons in a single day would be the experience of a lifetime
for many. Pull out your Rand McNally and find Whitefish Point. It's
just a bit north of Paradise, Michigan. Check your map. Dave can use
a little more help.