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 .
In the United States , the largest breeding population is present in Alaska with 3,600 to 6,000 territorial pairs .
The United States Great Lakes region has 5,900 to 7,200 territorial pairs which accounts for over half of the breeding population in the United States .
In the United States , the largest breeding population is present in Alaska with 3,600 to 6,000 territorial pairs .