The St. Croix and Namekagon rivers serve as an "ecological corridor" supporting a superb richness of habitats for birds. Here are some reasons why.
Biological Communities Converge Here
Three major communities—the northern coniferous forest, the eastern deciduous forest, and pockets of prairie—overlap and intertwine along the Riverway. The topography and wet and dry riverine areas, plus relatively unbroken stretches of riverside forests, make this an important refuge for birds and other animals.
The North-South Orientation of the Riverway
Birds follow natural river landmarks during spring and fall migration. Riverside forests are good places for many species to replenish themselves on their way north or south. River bluffs warm air currents sending thermals upward, advantageous for soaring migrants such as hawks and eagles.
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