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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| O'Gorman, F. & Claassens, A.J.M. | 1965 | Myotis nattereri (Kuhl.), a bat new to Co. Kerry | Journal | Ir. Nat. J. | Details... |
| O'Gorman, F. & Claassens, A.J.M. | 1965 | The second record of Iscnopsyllus (Ischnopsyllus) simplex simplex Rothschild 1906 (Siphonaptera) in Ireland | Journal | Ir. Nat. J. | Details... |
| O'hUalllachain, D. & Gilleran, J. | 2005 | Long-finned pilot whale Globicephala melaena (Traill), in Co. Galway | Journal | Ir. Nat. J. | Details... |
| O'Keefe, D.A. & Fairley, J.S. | 1981 | Two population studies of Irish pygmy shrews | Journal | Ir. Nat. J. | Details... |
| O'Keefe, T.G. | 1976 | Bat records from Co. Cork and Co. Limerick | Journal | Ir. Nat. J. | Details... |
| O'Leary, E.M., Sleeman, D.P. & Harrison, S. | 2006 | Diet of urban otters Lutra lutra (L.) | Journal | Ir. Nat. J. | Details... |
| O'Mahony, E. | 1931 | Notes on the mammals of the North Bull, Dublin Bay | Journal | Ir. Nat. J. | Details... |
| O'Mahony, E. | 1935 | Discovery of a second race of the house-mouse in Ireland | Journal | Ir. Nat. J. | Details... |
| O'Mahony, E. | 1935 | The North Bull house mouse | Journal | Ir. Nat. J. | Details... |
| O'Mahony, E. | 1937 | On some forms of the house mouse, Mus musculus Linn., in Ireland | Journal | Ir. Nat. J. | Details... |
| O'Mahony, E. | 1947 | The mammal ectoparasites of the North Bull Island, Dublin Bay | Journal | Ir. Nat. J. | Details... |
| O'Riordan, C.E. | 1965 | A carnivorous isopod from Irish waters | Journal | Ir. Nat. J. | Details... |
| O'Riordan, C.E. | 1969 | Recent strandings on the Irish coast | Journal | Ir. Nat. J. | Details... |
| O'Riordan, C.E. | 1972 | Provisional list of Cetacea and turtles stranded or captured on the Irish coast | Journal | Proc. Roy. Ir. Acad. | Details... |
| O'Riordan, C.E. | 1981 | A review of the provisional list of Cetacea stranded or captured on the Irish coast | Journal | Ir. Nat. J. | Details... |
| O'Riordan, C.E. | 1981 | Marine fauna notes from the National Museum of Ireland - VII. | Journal | Ir. Nat. J. | Details... |
| O'Riordan, C.E. | 1981 | Review: 'Irish whales and whaling' by J.S. Fairley | Journal | Ir. Nat. J. | Details... |
| O'Riordan, C.E. | 1982 | Marine fauna notes from the National Museum of Ireland - 8. | Journal | Ir. Nat. J. | Details... |
| O'Riordan, C.E. | 1984 | Sperm whale Physeter catodon L. | Journal | Ir. Nat. J. | Details... |
| O'Riordan, C.E. | 1984 | (Common porpoise record) | Journal | Ir. Nat. J. | Details... |
1096 references found.