Subregions- Alabama
 - Anticosti Island, Quebec, Canada
- Arizona
- Arizona-Sonora border region
- Arkansas
- Arkansas-Oklahoma border region
- Bahama Islands
- Bay of Campeche
- Cape Girardeau, Missouri region
- central Mexico
- central Texas
- Chesapeake Bay region
- Chihuahua, Mexico
- Colorado
- Davis Strait
- eastern Missouri
- eastern Quebec, Canada
- Florida-Georgia border region
- Florida Peninsula
- Gaspe Peninsula, Quebec, Canada
- Georgia, USA
- Gulf of Maine
- Gulf of Mexico
- Gulf of St. Lawrence
- Hebgen Lake region
- Hudson Bay
- Hudson Strait region, Canada
- Illinois
- Indiana
- Iowa
- Iowa-Missouri border region
- Jalisco, Mexico
- Kansas
- Kentucky
- Labrador, Newfoundland and Labrador, Canada
- Labrador Sea
- Louisiana
- Louisiana-Texas border region
- Maine
- Manitoba, Canada
- Michigan
- Minnesota
- Mississippi
- Missouri
- Missouri-Arkansas border region
- Missouri-Kansas border region
- Montana
- near the coast of Texas
- Nebraska
- New Brunswick, Canada
- Newfoundland, Newfoundland and Labrador, Canada
- New Jersey
- New Mexico
- New Mexico-Chihuahua border region
- New York
- North Carolina
- North Dakota
- northern Mexico
- northern Quebec, Canada
- Nova Scotia, Canada
- off the east coast of the United States
- Ohio
- Oklahoma
- Ontario, Canada
- Pennsylvania
- Prince Edward Island, Canada
- Saskatchewan, Canada
- South Carolina
- South Dakota
- southeastern Missouri
- southern Idaho
- southern Illinois
- southern Indiana
- southern New England
- southern Ontario, Canada
- southern Quebec, Canada
- southern Texas
- Tennessee
- Texas-Mexico border region
- Texas Panhandle region
- Utah
- Veracruz, Mexico
- Vermont - New Hampshire region
- Virginia
- western Florida
- western Texas
- West Virginia
- Wisconsin
- Wyoming
- Yellowstone region, Wyoming
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