| Belfast Naturalists' Field Club | Belfast Club hosted by HabitasOnline |
| BirdWatch Galway | Galway branch of the national bird conservation organisation |
| B.S.B.I. | The Botanical Society of the British Isles |
| Burrenbeo | Interactive Interpretative Centre of the Burren |
| Butterfly Ireland | DNFC butterfly site |
| County Armagh Wildlife Society | County Armagh Wildlife Society (was Armagh Field Naturalists' Society) |
| Crann | Irish tree organisation (aim to increase broadleaf tree cover in Ireland) |
| DragonflyIreland | 2000-2003 Irish Dragonfly Census (hosted by HabitasOnline) |
| Dublin Naturalists' Field Club | Dublin Club |
| Enfo | The body responsible for environmental information in Ireland |
| HabitasOnline | Great information on many kinds of Irish Wildlife (Ulster Museum) |
| I.N.J. | The Irish Naturalists' Journal (hosted by HabitasOnline) |
| I.W.D.G. | The Irish Whale and Dolphin Group |
| MothsIreland | MothsIreland Project: mapping Ireland's moths. |
| Richard Ward | Galway-based wildlife artist |
| Waterford Wildlife | The field club of County Waterford |
| Wexford Naturalists' Field Club | Wexford Club |