| Slavonian Grebe, Theale GPs, 1, 3rd-4th January. (H Netley) | OK |
| Black-necked Grebe, Theale GPs, 3, 1st-10th January. (A B Merrick) | OK |
| Black-necked Grebe, Lower Farm GP, 1, 11th January. (N Cleere, J Legg, I L G Weston) | OK |
| Black-necked Grebe, Burghfield GPs, 1, 3rd-10th February. | NDR |
| Black-necked Grebe, Lower Farm GP, 1, 8th February to 21st March. (J Legg, A B Tomczynski, I L G Weston) | OK |
| Black-necked Grebe, Theale GPs, 1, 2nd March. (K E Moore) | OK |
| Black-necked Grebe, Queen Mother Reservoir, 2 (two), 30th June. (C D R Heard) | OK |
| Black-necked Grebe, Queen Mother Reservoir, 1 (adult), 14th November. (C D R Heard) | OK |
| Great White Egret, Padworth Lane GP, 1, 1st January to 8th February. | NDR |
| Great White Egret, Moor Green Lakes, 1, 2nd January to 22nd March. | NDR |
| Great White Egret, Fleethill Farm, 1, 7th January to 20th March. | NDR |
| Great White Egret, Windsor, 1, 26th March. | NDR |
| Great White Egret, Reading, 1, 7th April. | NDR |
| Great White Egret, Fobney Meadow, 1, 8th-21st April. | NDR |
| Great White Egret, Great Meadow Pond, 2 (two), 31st May to 4th October, two birds 20th September to 4th October. | NDR |
| Great White Egret, Lavell's Lake, 1, 23rd June. | NDR |
| Great White Egret, Thatcham Marsh, 2, 28th June. | NDR |
| Great White Egret, Moor Green Lakes, 1, 8th July. | NDR |
| Great White Egret, Dinton Pastures CP, 3, 11th September. | NDR |
| Great White Egret, Crookham Common, 1, 15th-16th September. | NDR |
| Great White Egret, Fleethill Farm, 1, 13th October to 30th December. | NDR |
| Great White Egret, Lower Farm GP, 1, 14th October. | NDR |
| Great White Egret, Woolhampton GPs, 2, 17th October to 15th December. | NDR |
| Great White Egret, Moor Green Lakes, 1, 19th October. | NDR |
| Great White Egret, Theale GPs, 3, 30th October to 29th November. | NDR |
| Great White Egret, Battlemead Common, 1, 30th October to 6th November. | NDR |
| Great White Egret, Moor Green Lakes, 1, 19th November to 17th December. | NDR |
| Great White Egret, Hurst, 1, 28th November. | NDR |
| Great White Egret, Padworth Lane GP, 2, 2nd-30th December. | NDR |
| Great White Egret, Theale GPs, 1, 18th-23rd December. | NDR |
| Whooper Swan, Lower Farm GP, 1, 15th October. (N Cleere) | OK |
| Whooper Swan, Streatley, 1, 12th-14th December. (I Lewington) | OK |
| White-fronted Goose, Theale GPs, 8, 1st January. (A B Merrick) | OK |
| White-fronted Goose, Temple, 13, 1st-13th December. (A Akkaraju) | OK |
| White-fronted Goose, Horton Brook Quarry, 4, 2nd December. (C D R Heard, A B Tomczynski) | OK |
| White-fronted Goose, Theale GPs, 27, 5th-19th December. (A B Merrick) | OK |
| White-fronted Goose, Burghfield GPs, 1, 12th-13th December. (N J Bucknell) | OK |
| Garganey, Lower Farm GP, 2, 18th March. (G J Stewart) | OK |
| Garganey, Padworth Lane floods, 2, 22nd-23rd March. (P Hickman) | OK |
| Garganey, Dorney Wetlands, 2, 23rd March. (K Rhodes) | OK |
| Garganey, Martin's Heron, Bracknell, 2, 28th April. (M A Johnstone) | OK |
| Garganey, Moor Green Lakes, 1, 15th May. (J D Savage) | OK |
| Garganey, Eton Wick, 1, 13th-14th June. (M F Walford) | OK |
| Garganey, Great Meadow Pond, 1 (juvenile), 26th June to 2nd August. (D J Barker) | OK |
| Garganey, Eton Wick, 1, 13th September. (D Cleal) | OK |
| Garganey, Burghfield GPs, 1, 20th September. | NDR |
| Garganey, Lower Farm GP, 1, 28th October. | NDR |
| Scaup, Moor Green Lakes, 1, 19th January. | NDR |
| Scaup, Burghfield GPs, 1, 28th November to 16th March 2021. (M F Walford) | OK |
| Common Scoter, Summerleaze GP, 1 (male), 19th March. (C D R Heard) | OK |
| Common Scoter, Queen Mother Reservoir, 3 (two adult male and one first-winter male), 19th March. (C D R Heard) | OK |
| Common Scoter, Emmer Green, 3, 2nd April. (A M Horscroft) | OK |
| Common Scoter, Windsor, 1, 2nd April. (D A Carter) | OK |
| Common Scoter, Palmer Park, Reading, 1, 2nd April. (F Hutchinson) | OK |
| Common Scoter, Reading, 1, 2nd April. (R Righelato) | OK |
| Common Scoter, Palmer Park, Reading, 1, 3rd April. (F Hutchinson) | OK |
| Common Scoter, Virginia Water, 1, 15th May. | NDR |
| Common Scoter, Theale GPs, 1, 22nd May. | NDR |
| Common Scoter, Queen Mother Reservoir, 3 (three (including two males)), 16th August. (A B Tomczynski, C D R Heard) | OK |
| Red-breasted Merganser, Queen Mother Reservoir, 1 (redhead), 24th September. (C D R Heard) | OK |
| Marsh Harrier, Lea Farm Lake, 1, 6th January. (A B Tomczynski) | OK |
| Marsh Harrier, Horton GPs, 1 (female-type), 7th April. (C D R Heard) | OK |
| Marsh Harrier, Great Meadow Pond, 1 (juvenile), 30th August. (D J Barker) | OK |
| Marsh Harrier, Windsor Great Park, 1 (juvenile), 19th September. (C D R Heard) | OK |
| Marsh Harrier, Great Meadow Pond, 1 (juvenile female), 20th September to 1st November. (D J Barker) | OK |
| Marsh Harrier, Horton Brook Quarry, 1 (juvenile), 27th September. (C D R Heard) | OK |
| Hen Harrier, Roden Downs, 1, 2nd-5th January. (A B Tomczynski) | OK |
| Hen Harrier, Lambourn, 1 (ring-tail), 24th January. (C D R Heard) | OK |
| Hen Harrier, Bury Down, 1, 12th February. (N J Bucknell) | OK |
| Hen Harrier, Palmer Park, Reading, 1, 7th May. | NP |
| Hen Harrier, Farnborough, 1, 18th October to 20th December. (G D Scholey) | OK |
| Hen Harrier, Bury Down, 1, 20th November. | NDR |
| Osprey, Horton, 1, 5th May. (C D R Heard) | OK |
| Osprey, Kintbury, 1, 15th-18th May. | NDR |
| Osprey, Swallowfield, 1, 30th July. | NP |
| Osprey, Queen Mother Reservoir, 1, 29th August. (C D R Heard) | OK |
| Osprey, Queen Mother Reservoir, 1, 11th September. (C D R Heard) | OK |
| Osprey, Theale GPs, 1, 5th October. | NDR |
| Osprey, Arborfield, 1, 19th October. | NDR |
| Merlin, Aldworth, 1, 2nd January. (A B Tomczynski) | OK |
| Merlin, Compton Downs, 1, 4th January. (R Righelato) | OK |
| Merlin, Great Shefford, 1, 17th January. | NDR |
| Merlin, Bury Down, 1, 29th January. (P Brant) | OK |
| Merlin, Streatley, 1, 4th February. | NDR |
| Merlin, Compton Downs, 1, 1st March. | NP |
| Merlin, Burghfield, 1, 14th March. (A B Tomczynski) | OK |
| Merlin, Lavell's Lake, 1, 8th August. | NDR |
| Merlin, Cow Down, West Ilsley, 1, 20th September. (A B Tomczynski) | OK |
| Merlin, Englefield, 1, 25th October. | NDR |
| Merlin, South Fawley, 1, 4th November. (A B Tomczynski) | OK |
| Merlin, Frost Folly, 1, 5th December. | NDR |
| Merlin, Theale, 1, 5th December. | NDR |
| Merlin, Sandhurst GPs, 1, 10th December. | NDR |
| Merlin, Cox Green, Maidenhead, 1, 12th December. | NP |
| Merlin, Woolley Down, 1, 19th December. (G D Scholey) | OK |
| Quail, Wellbottom Down, 3, 20th May to 29th July. (R J Claridge) | OK |
| Quail, Compton Downs, 1, 13th June. (N J Bucknell) | OK |
| Quail, Eastbury Down, 1, 25th-27th June. (A E D Hickman) | OK |
| Quail, Roden Downs, 3, 1st-29th July. (R Dryden) | OK |
| Quail, Hampstead Norreys, 1, 2nd August. | NDR |
| Quail, Upper Bucklebury, 1, 13th August. | NDR |
| Avocet, Lower Farm GP, 1, 27th August. (I L G Weston) | OK |
| Grey Plover, Queen Mother Reservoir, 1, 9th October. (A B Tomczynski) | OK |
| Knot, Queen Mother Reservoir, 1, 16th-23rd August. (A B Tomczynski) | OK |
| Knot, Queen Mother Reservoir, 1, 11th September. (M F Walford) | OK |
| Sanderling, Queen Mother Reservoir, 1, 2nd June. (P J Newbound) | OK |
| Bar-tailed Godwit, Datchet, 1, 13th April. (C D R Heard) | OK |
| Bar-tailed Godwit, Horton Brook Quarry, 17, 28th April. (C D R Heard) | OK |
| Wood Sandpiper, Fobney Meadow, 1, 16th May. (R C N Price) | OK |
| Wood Sandpiper, Lea Farm Lake, 1, 4th July. | OK |
| Little Gull, Lower Farm GP, 1, 16th February. (I L G Weston) | OK |
| Little Gull, Theale GPs, 1, 9th April. | NDR |
| Little Gull, Moor Green Lakes, 1, 18th April. (R C Murfitt) | OK |
| Kittiwake, Lower Farm GP, 1, 10th-12th February. (N Cleere, I L G Weston) | OK |
| Kittiwake, Queen Mother Reservoir, 1 (adult), 24th February, moribund and died. (C D R Heard) | OK |
| Kittiwake, Queen Mother Reservoir, 1 (adult), 27th February. (C D R Heard) | OK |
| Kittiwake, Queen Mother Reservoir, 1 (adult), 9th March. (C D R Heard) | OK |
| Kittiwake, Queen Mother Reservoir, 1 (adult), 26th May. (C D R Heard) | OK |
| Kittiwake, Queen Mother Reservoir, 1, 2nd November. (A B Tomczynski) | OK |
| Sandwich Tern, Queen Mother Reservoir, 1 (adult), 6th April. (C D R Heard) | OK |
| Sandwich Tern, Woodlands Park, Maidenhead, 1, 21st April. (D J Barker) | OK |
| Sandwich Tern, Queen Mother Reservoir, 6 (six), 7th August. (C D R Heard) | OK |
| Sandwich Tern, Queen Mother Reservoir, 3, 10th September. (P J Newbound) | OK |
| Arctic Tern, Dinton Pastures CP, 3, 7th August. | NDR |
| Arctic Tern, Queen Mother Reservoir, 34, 25th August. (A B Tomczynski) | OK |
| Arctic Tern, Theale GPs, 2, 2nd September. (A B Tomczynski) | OK |
| Arctic Tern, Queen Mother Reservoir, 3, 3rd September. (A B Tomczynski) | OK |
| Little Tern, Queen Mother Reservoir, 3 (three), 31st July. (C D R Heard) | OK |
| Hoopoe, Newbury, 1, 19th February. | NDR |
| Hoopoe, Lower Farm Trout Lake, 1, 19th April. (N Cleere) | OK |
| Rock Pipit, Queen Mother Reservoir, 1, 5th-6th October. (C D R Heard) | OK |
| Rock Pipit, Borough Marsh, 1, 8th October. (C D R Heard) | OK |
| Rock Pipit, Horton Brook Quarry, 1, 11th October. (C D R Heard) | OK |
| Rock Pipit, Queen Mother Reservoir, 1, 16th October. (C D R Heard) | OK |
| Rock Pipit, Queen Mother Reservoir, 3, 16th October. (M F Walford) | OK |
| Rock Pipit, Queen Mother Reservoir, 1, 20th-24th October. (C D R Heard) | OK |
| Water Pipit, Horton, 1, 3rd January. (C D R Heard) | OK |
| Water Pipit, Queen Mother Reservoir, 1, 4th January. (C D R Heard) | OK |
| Water Pipit, Queen Mother Reservoir, 1, 14th-16th January. (D J Barker) | OK |
| Water Pipit, Queen Mother Reservoir, 1, 14th February. | NP |
| Water Pipit, Queen Mother Reservoir, 1, 22nd February to 1st March. (C D R Heard) | OK |
| Water Pipit, Wraysbury GPs, 1, 9th March. (C D R Heard) | OK |
| Water Pipit, Queen Mother Reservoir, 1, 16th March. (D J Barker) | OK |
| Water Pipit, Fobney Meadow, 3, 6th April. (A V Lawson) | OK |
| Water Pipit, Queen Mother Reservoir, 1, 7th November. (P J Newbound) | OK |
| Water Pipit, Queen Mother Reservoir, 1, 14th-27th November. (C D R Heard) | OK |
| Water Pipit, Horton, 1, 21st November to 20th December. (C D R Heard) | OK |
| Water Pipit, Fobney Meadow, 1, 17th December. (A V Lawson) | OK |
| White Wagtail, Greenham Common, 1, 23rd August. (J Legg) | OK |
| White Wagtail, Crookham Common, 1, 31st August. | NDR |
| White Wagtail, Eton, 1, 20th September. | NDR |
| White Wagtail, Lower Farm GP, 1, 20th-27th September. | NDR |
| White Wagtail, Moor Green Lakes, 1, 25th September. | NP |
| Black Redstart, Confidential, 6, 3rd April to 16th October. (P O'Neil) | OK |
| Black Redstart, Greenham Common, 1, 16th-17th April. (N Cleere, J Legg) | OK |
| Black Redstart, Queen Mother Reservoir, 1 (first-winter), 15th-16th October. (C D R Heard) | OK |
| Black Redstart, Woolhampton GPs, 1, 8th-9th November. (R R Keel) | OK |
| Black Redstart, Barkham, 1, 8th-11th December. (S Orino) | OK |
| Black Redstart, Queen Mother Reservoir, 1 (adult male), 24th December. (C D R Heard) | OK |
| Ring Ouzel, Warfield, 1, 26th April. | NDR |
| Ring Ouzel, Greenham Common, 2, 29th September. (J Legg, I L G Weston) | OK |
| Ring Ouzel, Greenham Common, 1, 17th October. | NDR |
| Ring Ouzel, Lavell's Lake, 1, 18th October. | IC |
| Yellow-browed Warbler, Hermitage, 1, 13th October. | NDR |
| Willow Tit, Welford, 4, 11th January to 16th August. | NDR |
| Willow Tit, Combe Wood, 3, 20th January to 14th October. | OK |
| Willow Tit, Walbury Hill, 2, 7th February to 25th October. | OK |
| Hawfinch, Upper Bucklebury, 2, 8th January. | NDR |
| Hawfinch, Combe Hill, 14, 24th-29th January. (S Ricks) | OK |
| Hawfinch, Englefield, 1, 26th February. | NDR |
| Hawfinch, Lavell's Lake, 1, 17th May. | NDR |
| Hawfinch, Woose Hill, 1, 30th September. (P Bright-Thomas) | OK |
| Hawfinch, Englefield, 1, 17th October. | NDR |
| Hawfinch, Woose Hill, 1, 26th October. (P Bright-Thomas) | OK |
| Hawfinch, Crowthorne, 1, 29th October. | NP |
| Hawfinch, Combe Wood, 3 (three), 23rd November. (C D R Heard) | OK |