Swans Return to the Upper Mississippi River
by Michelle Marron and Ruth Nissen, Wisconsin DNR
Tundra swans rest on Pools 4-11 during the
fall migration, moving through just before ice forms on the river. More will be arriving daily, building up to their peak population
which is about 16,000 during the month of November.
Click here for
viewing info: Hwy 26, Brownsville, Minnesota.
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." Swans are also resting by
the thousands in Pool 8 near Stoddard, Wisconsin, and Brownsville, Minnesota.
(From DISCOVER! AMERICA'S GREAT RIVER ROAD, Volume 1, by Pat
Middleton )
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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. 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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