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| Author(s) [A-Z] | Year [ascending] | Title | Type | Journal | Citation |
| Thompson, K. | 1899 | Colias edusa in Co. Donegal | Journal | Ir. Nat. | Details... |
| Tolman, T. | 1997 | Field guide to the butterflies of Britain and Europe | Book | | Details... |
| Townsend, M. | 1928 | Clouded yellow butterfly in County Cork | Journal | Ir. Nat. J. | Details... |
| Turner, H.J. | 1920 | Melitaea aurinia | Journal | Proc. Trans. S. Lond. Entomol. Nat. Hist. Soc. | Details... |
| Turner, H.J. | 1922 | Euchloe cardamines | Journal | Proc. Trans. S. Lond. Entomol. Nat. Hist. Soc. | Details... |
| Ward, W.T.C. | 1901 | Vanessa io near Londonderry | Journal | Ir. Nat. | Details... |
| Warren, B.C.S. | 1936 | Monogragh of the genus Erebia | Book | | Details... |
| Warren, M.S. | 1984 | The biology and status of the wood white butterfly, Leptidea sinapsis (L.) (Lepidoptera: Pieridae) in the British Isles | Journal | Ent. Gaz. | Details... |
| Warren, M.S. | 1987 | Butterfly Site Register. Dorset | Report | | Details... |
| Westropp, M.S.D. | 1919 | Colias edusa in Co. Cork | Journal | Ir. Nat. | Details... |
| Westropp, M.S.D. | 1924 | Review: 'Butterfly lore' by H. Eltringham | Journal | Ir. Nat. | Details... |
| Westropp, S. | 1893 | The clouded yellow butterfly (Colias edusa) in Cork | Journal | Ir. Nat. | Details... |
| Whatmough, J.A. | 1981 | The butterfly census. Murlough Scientific Report 1980 | Report | | Details... |
| Whatmough, J.A. | 1982 | The butterfly census. Murlough Scientific Report 1981 | Report | | Details... |
| Whatmough, J.A. & Cronk, R.P. | 1984 | Butterfly census 1982. Murlough Scientific Report 1982/83 | Report | | Details... |
| Williams, A. | 1914 | Early butterflies at Killarney | Journal | Ir. Nat. | Details... |
| Williams, C.B. | 1927 | Aglais urticae | Journal | Proc. Trans. S. Lond. Entomol. Nat. Hist. Soc. | Details... |
| Williams, C.B. | 1951 | Seasonal changes in flight direction of migrant butterflies in the British Isles | Journal | J. Anim. Ecol. | Details... |
| Wilson, J.S. | 1917 | Agriades bellargus in Ireland | Journal | Ent. | Details... |
| Wolfe, J.J. | 1894 | Larvae of Vanessa atalanta. A correction | Journal | Ir. Nat. | Details... |
385 references found.