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Map Legend
Region Name Number of Studies
World [map] 210
North America 171
United States 168 [studies]
Alabama 12 [studies]
Arizona 2 [studies]
Arkansas 3 [studies]
California 36 [studies]
Colorado 9 [studies]
Connecticut 17 [studies]
District of Columbia 2 [studies]
Florida 26 [studies]
Georgia 5 [studies]
Illinois 5 [studies]
Indiana 2 [studies]
Kansas 14 [studies]
Kentucky 5 [studies]
Louisiana 4 [studies]
Maine 2 [studies]
Maryland 25 [studies]
Massachusetts 26 [studies]
Michigan 3 [studies]
Minnesota 2 [studies]
Mississippi 6 [studies]
Missouri 6 [studies]
Nevada 2 [studies]
New Hampshire 2 [studies]
New Jersey 8 [studies]
New Mexico 5 [studies]
New York 38 [studies]
North Carolina 10 [studies]
Ohio 20 [studies]
Oklahoma 6 [studies]
Oregon 14 [studies]
Pennsylvania 21 [studies]
Rhode Island 7 [studies]
South Carolina 11 [studies]
Tennessee 5 [studies]
Texas 17 [studies]
Utah 16 [studies]
Vermont 7 [studies]
Virginia 7 [studies]
Washington 19 [studies]
West Virginia 1 [studies]
Wisconsin 6 [studies]

Click on a [map] link to show a map of that region.

Click on a [studies] link to search within your current results for studies in that region. Use the back button to return to this list and try another region.

Studies with no locations are not included in the counts or on the map.

Studies with multiple locations are included in each region containing locations.