Despite the presense of long-banned pesticides showing up their offspring, herons nesting along the Lake Calumet area are still going strong. So where are the banned pesticides coming from? Why the good ol' Chicago alewife, of course.
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Despite the presense of long-banned pesticides showing up their offspring, herons nesting along the Lake Calumet area are still going strong. So where are the banned pesticides coming from? Why the good ol' Chicago alewife, of course.
