2004 Migrants
| Sand Martin | 19th March, Waterside, Galway City (Michael Davis) |
| House Martin | 18th April, Aughrim (Enda McLoughlin) |
| Swallow | 3rd April, Aughrim (Enda McLoughlin) |
| Swift | 27th April, River Corrib, Galway City (Michael Davis) |
| Common Sandpiper | 28th April, Luimnagh West, Corrandulla (Deirdre Comerford) |
| Whimbrel | 23rd April, Milltown, Nr. Tuam (Chris Benson) |
| Common Tern | |
| Arctic Tern | |
| Little Tern | |
| Black Tern | |
| Roseate Tern | |
| Willow Warbler | 5th April, Aughrim & Barna (Enda McLoughlin, Theresa Loughrey & David O'Keeffe) |
| Sedge Warbler | 25th April, Milltown, Nr. Tuam (Chris Benson) |
| Whitethroat | 25th March, Ellagh, Headford (Neil Sharkey) |
| Grasshopper Warbler | 17th April, Aughrim (Enda McLoughlin) |
| Garden Warbler | |
| Corncrake | 19th April, Inishbofin |
| Spotted Crake | |
| Quail | |
| Cuckoo | 13th April, Inagh Valley, Connemara (Louise Hynes) |
| Turtle Dove | 22nd May, Inishmore, Aran Islands (Finola Murphy) |
| Nightjar | |
| Wheatear | 22nd March, Silver Strand, Rusheen Bay, Nr. Galway City (Tim Griffin) |
| Ring Ouzel | |
| Spotted Flycatcher | 23rd May, Nr. Milltown, Tuam (Chris Benson) |
| Pied Flycatcher | |
| Garganey | |
| Manx Shearwater | |
| Arctic Skua | 22nd April, Nimmo's Pier, Galway City (Michael Davis) |
| Great Skua | |
| Pomarine Skua | 6th May, Galway Bay (Neil Sharkey & Chris Peppiatt) |