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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Cunningham, R.O. | 1893 | Chionis alba Lath. | Journal | Ir. Nat. | Details... |
| Cush, P. | 1991 | Portmore Lough Annual Report | Report | | Details... |
| Cush, P. | 1995 | Belfast Lough - low tide counts | Unpublished | | Details... |
| D'Arcy, D. | 1930 | Birds seen at the Palace, Armagh | Journal | Ir. Nat. J. | Details... |
| Dalgety, C.T. | 1948 | Ringed wild geese wanted | Journal | Ir. Nat. J. | Details... |
| Darragh, T. | 1882 | Birds | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| David Cromack (Editor) | 1999 | Issue: October 1999. UK Bird Sightings for August. Photograph by Tommy Ennis | Magazine article | | Details... |
| Davidson, R. | 1988 | Tampuddens, redheads and wild swans | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Davidson, R.C. | 1955 | Peregrine 'stooping' at golden eagle | Journal | Ir. Nat. J. | Details... |
| Davidson, R.C. | 1955 | Notes on the fulmar petrel colony at Benderg Bay, Co. Down | Journal | Ir. Nat. J. | Details... |
| Davies, J. | 1983 | Irish rare breeding birds panel | Journal | Ir. Nat. J. | Details... |
| Day, G. | 2000 | Excursion: RSPB Belfast Harbour Reserve | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Day, G. | 2000 | Excursion: Bird-song at Belvoir Forest Park, Belfast | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| Day, G. | 2000 | Excursion: Birds and plants of Rathlin Island, Co. Antrim | Journal | Proc. Belf. Nat. Fld. Club | Details... |
| de Burgh, I. | 1944 | Firecrest in Ireland | Journal | Ir. Nat. J. | Details... |
| Deane, C.D. | 1932 | Late nesting of house martin and swallow | Journal | Ir. Nat. J. | Details... |
| Deane, C.D. | 1933 | Three species of birds nesting in one nest | Journal | Ir. Nat. J. | Details... |
| Deane, C.D. | 1933 | Strange nesting sites of blackbird and song thrush | Journal | Ir. Nat. J. | Details... |
| Deane, C.D. | 1934 | Black-headed gull breeding on island in Strangford Lough | Journal | Ir. Nat. J. | Details... |
| Deane, C.D. | 1934 | Whooper swan in May | Journal | Ir. Nat. J. | Details... |
2846 references found.