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A similar map is available for all studies in

Click on the map below to show a more detailed map (when available) or search for studies (when map not available).

Map Legend
Region Name Number of Studies
World [map] 77
North America 57
United States 53 [studies]
Alabama 5 [studies]
Alaska 1 [studies]
Arizona 14 [studies]
Arkansas 3 [studies]
California 22 [studies]
Colorado 8 [studies]
Connecticut 5 [studies]
Florida 23 [studies]
Georgia 11 [studies]
Idaho 4 [studies]
Illinois 14 [studies]
Indiana 17 [studies]
Kansas 5 [studies]
Kentucky 3 [studies]
Louisiana 9 [studies]
Maryland 7 [studies]
Massachusetts 6 [studies]
Michigan 3 [studies]
Minnesota 5 [studies]
Missouri 6 [studies]
Montana 2 [studies]
Nebraska 4 [studies]
Nevada 3 [studies]
New Jersey 6 [studies]
New York 36 [studies]
North Carolina 8 [studies]
North Dakota 1 [studies]
Ohio 8 [studies]
Oklahoma 7 [studies]
Oregon 3 [studies]
Pennsylvania 12 [studies]
Rhode Island 3 [studies]
South Carolina 1 [studies]
South Dakota 1 [studies]
Tennessee 13 [studies]
Texas 13 [studies]
Utah 5 [studies]
Virginia 12 [studies]
Washington 3 [studies]
Wisconsin 1 [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.