Robert O'Brien's Buckinghamshire county life list
| Species | Date | Location |
|---|
| Great Northern Diver | 30/12/2011 | Caldecotte Lake |
| Little Grebe | | |
| Great Crested Grebe | | |
| Slavonian Grebe | 15/11/2014 | Willen Lake |
| Black-necked Grebe | ********** | ********** |
| Cormorant | | |
| Bittern | ********** | ********** |
| Cattle Egret | 8/12/2013 | Steeple Claydon |
| Little Egret | | |
| Great White Egret | 22/1/2012 | Linford Lakes |
| Grey Heron | | |
| Mute Swan | | |
| Greylag Goose | | |
| Canada Goose | | |
| Barnacle Goose | 4/9/2016 | Little Marlow GP |
| Egyptian Goose | 4/9/2016 | Little Marlow GP |
| Shelduck | | |
| Mandarin Duck | | |
| Wigeon | | |
| Gadwall | | |
| Teal | | |
| Mallard | | |
| Pintail | | |
| Garganey | ********** | ********** |
| Shoveler | | |
| Red-crested Pochard | | |
| Pochard | | |
| Ring-necked Duck | 21/3/2010 | Foxcote Reservoir |
| Ferruginous Duck | 6/2/2016 | Caldecotte Lake |
| Tufted Duck | | |
| Long-tailed Duck | 12/2006 | Calvert BBOWT |
| Common Scoter | 12/11/2016 | Willen lake |
| Velvet Scoter | 12/11/2016 | Willen Lake |
| Goldeneye | 19/8/2010 | Foxcote Reservoir |
| Smew | 30/12/2011 | Caldecotte Lake |
| Red-breasted Merganser | 29/11/2014 | Caldecotte Lake |
| Goosander | | ********** |
| Ruddy Duck | | |
| Red Kite | | |
| Sparrowhawk | | |
| Buzzard | | |
| Kestrel | | |
| Merlin | 26/2/2011 | Hillesden |
| Hobby | | |
| Red-legged Partridge | | |
| Grey Partridge | | |
| Quail | 237/2005 | Cuddington |
| Pheasant | | |
| Water Rail | | Calvert |
| Moorhen | | |
| Coot | | |
| Crane | 22/5/2018 | Gallows Bridge |
| Oystercatcher | | |
| Stone-curlew | 6/4/2013 | Gallows Bridge |
| Little Ringed Plover | | |
| Ringed Plover | | |
| Golden Plover | | |
| Grey Plover | 9/5/2010 | Gallows Bridge |
| Lapwing | | |
| Dunlin | | |
| Ruff | 17/4/21 | Gallows Bridge |
| Snipe | | |
| Black-tailed Godwit | | |
| Curlew | | |
| Common Sandpiper | | |
| Green Sandpiper | | |
| Lesser Yellowlegs | 5/5/2014 | College Lake |
| Wood Sandpiper | 25/8/2013 | Manor Farm |
| Redshank | | |
| Turnstone | | |
| Black-headed Gull | | |
| Common Gull | | |
| Lesser Black-backed Gull | | |
| Herring Gull | | |
| Yellow-legged Gull | 7/1/2012 | Calvert BBOWT |
| Caspian Gull | 8/12/2013 | calvert BBOWT |
| Iceland Gull | 30/11/21 | |
| Glaucous Gull | 28/12/2012 | Foxcote Reservoir |
| Great Black-backed Gull | | |
| Black Tern | 4/9/2016 | Little Marlow GP |
| Common Tern | | |
| Arctic Tern | 2/5/2010 | Calvert BBOWT |
| Rock Dove / Feral Pigeon | | |
| Stock Dove | | |
| Woodpigeon | | |
| Collared Dove | | |
| Turtle Dove | ********** | ********** |
| Ring-necked Parakeet | 25/5/2015 | Little Marlow GP |
| Cuckoo | | |
| Barn Owl | | |
| Little Owl | | |
| Tawny Owl | | |
| Short-eared Owl | ********** | ********** |
| Swift | | |
| Kingfisher | | |
| Green Woodpecker | | |
| Great Spotted Woodpecker | | |
| Skylark | | |
| Sand Martin | | |
| Swallow | | |
| House Martin | | |
| Meadow Pipit | | |
| Yellow Wagtail | 17/7/2006 | Marsh Gibbon |
| Grey Wagtail | | |
| Pied Wagtail | | |
| Waxwing | 8/1/2011 | Aylesbury |
| Wren | | |
| Dunnock | | |
| Robin | | |
| Black Redstart | ********** | ********** |
| Redstart | 27/8/2011 | Rowsham |
| Stonechat | ********** | ********** |
| Wheatear | 7/4/2011 | Ivinghoe Beacon |
| Ring Ouzel | 14/4/2012 | Ivinghoe Beacon |
| Blackbird | | |
| Fieldfare | | |
| Song Thrush | | |
| Redwing | | |
| Mistle Thrush | | |
| Cetti's Warbler | 27/4/2009 | Calvert BBOWT |
| Sedge Warbler | | |
| Reed Warbler | | |
| Blackcap | | |
| Garden Warbler | 11/9/2010 | Marsh Gibbon |
| Lesser Whitethroat | 27/8/2011 | Rowsham |
| Chiffchaff | | |
| Willow Warbler | | |
| Goldcrest | | |
| Spotted Flycatcher | | |
| Long-tailed Tit | | |
| Blue Tit | | |
| Great Tit | | |
| Coal Tit | | |
| Marsh Tit | 3/1/2016 | Calvert BBOWT |
| Nuthatch | 22/6/2014 | Aspley Wood |
| Treecreeper | 4/5/2013 | Wendover Woods |
| Red-backed Shrike | 3/8/2014 | Quainton Hill |
| Great Grey Shrike | 26/2/2011 | Hillesden |
| Jay | | |
| Magpie | | |
| Jackdaw | | |
| Rook | | |
| Carrion Crow | | |
| Raven | | |
| Starling | | |
| House Sparrow | | |
| Chaffinch | | |
| Brambling | 13/1/2018 | Marsh Gibbon |
| Greenfinch | | |
| Goldfinch | | |
| Siskin | | |
| Linnet | | |
| Redpoll | | |
| Bullfinch | | |
| Yellowhammer | | |
| Reed Bunting | | |
