| Monday 20th March 2023 | ||
| The Alpine Swift influx continued to gather pace, with new birds in Kent at Shuart, Norfolk at Sheringham (two), Sidestrand, Cley Marshes, Devon at Teignmouth (three), Lincolnshire at Chapel Six Marshes (two), Kent at Oare Marshes (two), Glamorgan at Porthcawl, County Dublin at Blackrock (eight), County Armagh at Oxford Island, County Cork at Rosscarbery, Cork (two), Isle of Wight at Brading, Dumfries and Galloway at Rockcliffe. Birds lingered in Yorkshire, County Cork, County Waterford, County Dublin, Devon, Lincolnshire, Kent. A Lesser Scaup in Argyll was the only other new rarity.
Lingering rarities included the Black Duck in County Mayo, Long-billed Dowitchers in Norfolk and Orkney, Lesser Scaup in Somerset, King Eider in Cleveland, Pallid Harrier in Norfolk, two Penduline Tits in Kent, three Hume's Warblers in Kent. Scarcity highlights included a Hoopoe, Little Auk, two Little Buntings, Great Grey Shrike, Waxwing, Dutch-ringed White Stork, eight Glossy Ibises, Rough-legged Buzzard, three Green-winged Teal, two American Wigeon, Surf Scoter, 12 Ring-necked Ducks, Kumlien's Gull, two Tundra Bean Geese, Ring-billed Gull, five Glaucous Gulls and 11 Iceland Gulls. |
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| - Ben Clark, RBA | ||