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| Gull-billed Tern | ||
Click on the Date to open the record |
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| Year | County | Accepted |
| 1992 | DELAWARE | No |
| 1994 | LANCASTER | No |
| 1996 | LANCASTER | No |
| 1997 | CENTRE | No |
| 2003 | SNYDER | No |
| 2015 | PHILADELPHIA | No |
| 2020 | DELAWARE | No |