There are about 100 territorial pairs in the northwestern U.S. states of Washington , Idaho , Montana , and Wyoming .
The U.S. Great Lakes region has 5,900 to 7,200 territorial pairs which accounts for over half of the breeding population in the United States .
There are about 100 territorial pairs in the northwestern United States states of Washington , Idaho , Montana , and Wyoming .
The U.S. Great Lakes region has 5,900 to 7,200 territorial pairs which accounts for over half of the breeding population in the United States .