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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| O'Riordan, C.E. & Bruton, T. | 1986 | Notes on the crania of the euphrosyne dolphin Stenella coeruleoalba (Meyen) in the collections of the National Museum of Ireland | Journal | Ir. Nat. J. | Details... |
| O'Rourke, F.J. | 1964 | Ischnopsyllus intermedius (Rothschild), a bat flea new to Co. Cork | Journal | Ir. Nat. J. | Details... |
| O'Shea, J. | 1992 | Pilot whale Globiocephala melaena (Traill) | Journal | Ir. Nat. J. | Details... |
| O'Shea, J. | 1992 | (Euphrosyne dolphin record) | Journal | Ir. Nat. J. | Details... |
| O'Shea, J. | 1993 | White-sided dolphin Lagenorhynchus acutus (Gray) | Journal | Ir. Nat. J. | Details... |
| O'Shea, J. | 1994 | Pilot whale Globiocephala melaena (Traill) | Journal | Ir. Nat. J. | Details... |
| O'Shea, J. | 1994 | (Euphrosyne dolphin record) | Journal | Ir. Nat. J. | Details... |
| O'Shea, J. & Fairley, J.S. | 1991 | (Euphrosyne dolphin record) | Journal | Ir. Nat. J. | Details... |
| O'Shea, J., Kingston, R. & Fairley, J.S. | 1990 | (Euphrosyne dolphin record) | Journal | Ir. Nat. J. | Details... |
| O'Shea, J., Kingston, R. & Fairley, J.S. | 1990 | (Pilot whale record) | Journal | Ir. Nat. J. | Details... |
| O'Shea, J., Kingston, R. & Fairley, J.S. | 1990 | (White-sided dolphin record) | Journal | Ir. Nat. J. | Details... |
| O'Shea, J., Kingston, R. & Fairley, J.S. | 1990 | (Common dolphin records) | Journal | Ir. Nat. J. | Details... |
| O'Sullivan, B.W., Stronach, N. & Fairley, J.S. | 1975 | New records of horse-shoe bats | Journal | Ir. Nat. J. | Details... |
| O'Sullivan, P. | 1994 | Bats in Ireland | Supplement | Ir. Nat. J. | Details... |
| O'Sullivan, W.M. | 1991 | The distribution of otters Lutra lutra within a major Irish river system, the Munster Blackwater catchment, 1988-90 | Journal | Ir. Nat. J. | Details... |
| O'Sullivan, W.M. | 1994 | Summer diet of otters on part of the river Blackwater catchment | Journal | Ir. Nat. J. | Details... |
| O'Sullivan, W.M., Sleeman, D.P. & Murphy, D.M. | 1992 | Otters Lutra lutra feeding on carrion | Journal | Ir. Nat. J. | Details... |
| Odlum, W.P. | 1955 | Two bats hitherto unrecorded from Co. Leix | Journal | Ir. Nat. J. | Details... |
| Orr, H.L. | 1899 | The hedgehog and its food | Journal | Ir. Nat. | Details... |
| Orr, H.L. | 1900 | The hedgehog and its food | Journal | Ir. Nat. | Details... |
1096 references found.