2021 Migrants
| Sand Martin | 6th March, River Corrib at Dangan, Galway city (Cathal Forkan). |
| House Martin | 5th April, Nimmo's Pier, Galway city (Tom Cuffe). |
| Swallow | 30th March, Lettermullan, Headford and Clarenbridge (Sean MCCann, Niel Sharkey & Pádraig Keirns). |
| Swift | 25th April, Dangan, Galway city (Cathal Forkan). |
| Common Sandpiper | 11th April, Derryclare Wood (Dermot Breen). |
| Manx Shearwater | 29th March, off Loughaunbeg (Aonghus O'Donaill). |
| Whimbrel | 8th April, Tully Cross (Dermot Breen). |
| Marsh Harrier | 24th April, Angliham, Lough Corrib (Jacob Mead). |
| Osprey | |
| Hobby | |
| Common Tern | 17th April, Loughaunbeg (Cathal Forkan). |
| Arctic Tern | 19th April, Curraghmore, Nr. Inchiquin, Lough Corrib (Neil Sharkey). |
| Little Tern | 17th April, Loughaunbeg (Cathal Forkan). |
| Black Tern | |
| Roseate Tern | |
| Arctic Skua | 26th April, Tawin (Paul Troake). |
| Pomarine Skua | |
| Great Skua | |
| Long-tailed Skua | |
| Willow Warbler | 31st March, Bearna (Cathal Forkan). |
| Wood Warbler | |
| Sedge Warbler | 22nd April, Ballyconneely (Dermot Breen). |
| Whitethroat | 25th April, Nr. Monivea (Paidi Cullinan). |
| Lesser Whitethroat | |
| Grasshopper Warbler | 21st April, Bearna (Cathal Forkan). |
| Garden Warbler | |
| White Wagtail | 10th April, Roscam Point (Marcin Pisula). |
| Yellow Wagtail | |
| Corncrake | 19th April, Inishbofin (per NPWS Corncrake Census). |
| Spotted Crake | |
| Quail | |
| Cuckoo | 31st March, Rosmuc (Noreen Ryan). |
| Turtle Dove | |
| Nightjar | |
| Wheatear | 25th March, Tully Hill, Renvyle (Dermot Breen). |
| Whinchat | 23rd May, Bishop's Island (Dermot Breen). |
| Ring Ouzel | |
| Spotted Flycatcher | 19th May, Connemara National Park, Letterfrack (Dermot Breen). |
| Pied Flycatcher | |
| Garganey | 22nd May, Rahasane turlough (Cathal Forkan). |