| Country | Locality | Introduced | Year | Qualitative Value | Ref. |
|---|---|---|---|---|---|
| United States (contiguous states) | Cape Cod, s. shore and nearby islands | - | common | 84118 | |
| United States (contiguous states) | CT evidently rare or absent southward of Cape Cod | - | rare | 84118 | |
| United States (contiguous states) | DE evidently rare or absent southward of Cape Cod | - | rare | 84118 | |
| Canada | Maritimes, Bay of Fundy | - | rare | 11710 | |
| United States (contiguous states) | MD evidently rare or absent southward of Cape Cod | - | rare | 84118 | |
| United States (contiguous states) | NC evidently rare or absent southward of Cape Cod | - | abundant | 84118 | |
| Canada | New Brunswick, NB | - | rare | 11710 | |
| United States (contiguous states) | NJ evidently rare or absent southward of Cape Cod | - | rare | 84118 | |
| Canada | Nova Scotia | - | rare | 11710 | |
| United States (contiguous states) | NY evidently rare or absent southward of Cape Cod | - | rare | 84118 | |
| United States (contiguous states) | RI evidently rare or absent southward of Cape Cod | - | rare | 84118 | |
| United States (contiguous states) | SC evidently rare or absent southward of Cape Cod | - | abundant | 84118 | |
| United States (contiguous states) | VA evidently rare or absent southward of Cape Cod | - | rare | 84118 |