TUNDRA SWANS Return to the
Mississippi River
with Mississippi River author, Pat Middleton,
Michelle Marron and Ruth Nissen, Wisconsin DNR
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Tundra swans rest on Pools 4-11 during the fall migration, moving through just
before ice forms on the
river. More arrive daily, building up to their peak population during the
month of November. By all means swing over to the overlooks along Hwy 26 just
south of Brownsville, Minnesota, or south of Goose Island on the Wisconsin
shore.
The Army Corps of Engineers has finished several new islands just off the
wayside overlooks just south of Brownsville, which makes for superb birding.
At our recent visit, they were peppered with migrating ducks and at least 50
adult Bald Eagles. Once the Tundra Swan family groups begin arriving, Tundra
Swans are abundant just below Goose Island between La Crosse and Stoddard,
Wisconsin.
Harry Buck of Alma organized the first swan watch at Rieck's Park north
of Alma, Wisconsin, after he heard a visitor videotaping 4,000 tundra swans
saying that "all the noise was coming from these egrets."
(From
DISCOVER! AMERICA'S GREAT RIVER ROAD, Volume 1,
by Pat Middleton )
Common American Swan
(Tundra Swan)
Audubon painted this swan in London in
1838. He wanted the yellow water lilies to be named Nymphea
leitnernia after Edward F.
Leitner, a German botanist killed by Seminoles in 1838.
"Dr. Leitner also procured some
[flamingos] in the course of his botanical excursions along the western
coast of the Floridas, where he was at last murdered by some party of
Seminole Indians, at the time of our last disastrous war with those
children of the desert." --
John James Audubon
Table of Contents
Why Are the
Swans Here Now?
These birds of the arctic tundra are
migrating to their wintering grounds on Chesapeake Bay and the estuaries
of the east coast. Another population of tundra swans migrate to
California's San Joaquin and Sacramento Valleys to spend the winter.
Migrating during the day and night, their trumpeting calls are heard at a
great distance as they fly along in their familiar V-formation. During
flight, the swans can achieve speeds up to 100 miles per hour with a tail
wind. They have been sighted at elevations of 6000 to 8000 feet where
flocks have been struck by aircraft!
Pools 4-11 of the Mississippi River
provide the swans with a place to rest and feed on their way to wintering
grounds. While here, the tundra swans feed mainly on starchy bulbs or
tubers of plants such as arrowhead (duck potato), wild celery, and sago
pondweed. The tubers are buried in the mud on the bottom of the river, but
the swans are well equipped with powerful legs, large webs, and prominent
toes to stir up the soft mud and dislodge the tubers. With their long
necks, they can usually reach the bottom by just immersing their head and
neck, but sometimes in deeper water they tip up so that only the tail
protrudes above the water. Ducks often feed close to swans taking
advantage of the small animal and plant material distributed by the swans.
Where
to View Swans
Some
of the best places to view tundra swans during migration are located on
the Mississippi River between Pools 4 and 8. One of the best places to
view the birds up close, is the platform at Rieck's Lake Park just north
of Alma, Wisconsin on highway 35. Swan Watch volunteers will be at the
platform most weekdays and all weekends from 9 a.m. to dusk through
November 23.
Other traditional viewing sites include
Weaver Bottoms in Minnesota, and along highway 26 in Minnesota where swans
gather in the northern part of the Wisconsin Island Closed Area in Pool 8.
When Will the Swans Return in the
Spring?
On the return flight in spring, the swan's
progress is slower, and they stop more frequently than on the fall trip.
Thus they seldom appear in large enough groups to be noticeable. But they
will follow the ice thaw to the north. Open water, which may appear in
March, indicates taking a closer look at any large, long-necked waterfowl.
Pelicans reappear at about the same time... but are distinguished by
shorter necks and longer bills.
They nest in the tundra or sheltered marshes on
the Alaskan and Canadian coast near the Arctic Circle. Swans mate for
life, although if one dies, they will find a new mate. After choosing a
nesting site, the swans gather and pile up grass, sedges, and mosses to
make a nest measuring about 6 feet across and twelve to eighteen inches
high. The female lays 2-8 eggs and incubates about a month. Cygnets hatch
in late June and stay in the family for about one year.
The young of the year can be distinguished by the
grayish white color, the darker heads, and the pinkish, bills; by their
second trip to this area they will have their adult plumage.
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