| No. | Species | Fen Drayton |
| x = recorded | ||
| p = pending record | ||
| e = considered escape | ||
| 1 | Red-throated Diver | x |
| 2 | Black-throated Diver | |
| 3 | Great Northern Diver | x |
| 4 | Little Grebe | x |
| 5 | Great Crested Grebe | x |
| 6 | Red-necked Grebe | x |
| 7 | Slavonian Grebe | x |
| 8 | Black-necked Grebe | x |
| 9 | Black-browed Albatross | |
| 10 | Northern Fulmar | x |
| 11 | Sooty Shearwater | |
| 12 | Manx Shearwater | |
| 13 | European Storm-petrel | |
| 14 | Leach's Storm-petrel | x |
| 15 | Northern Gannet | x |
| 16 | Great Cormorant | x |
| 17 | Continental Cormorant | x |
| 18 | European Shag | x |
| 19 | Great Bittern | x |
| 20 | Little Bittern | |
| 21 | Black-crowned Night Heron | |
| 22 | Squacco Heron | |
| 23 | Cattle Egret | |
| 24 | Little Egret | x |
| 25 | Great Egret | x |
| 26 | Grey Heron | x |
| 27 | Purple Heron | x |
| 28 | Black Stork | |
| 29 | White Stork | p |
| 30 | Glossy Ibis | |
| 31 | Eurasian Spoonbill | x |
| 32 | Mute Swan | x |
| 33 | Tundra Swan | x |
| 34 | Whooper Swan | x |
| 35 | Bean Goose | x |
| 36 | Taiga Bean Goose | e |
| 37 | Pink-footed Goose | x |
| 38 | Greater White-fronted Goose | x |
| 39 | Greylag Goose | x |
| 40 | Canada Goose | x |
| 41 | Small Canada Goose | e |
| 42 | Barnacle Goose | e |
| 43 | Brent Goose | x |
| 44 | Pale bellied Brent Goose | |
| 45 | Egyptian Goose | x |
| 46 | Ruddy Shelduck | e |
| 47 | Common Shelduck | x |
| 48 | Mandarin Duck | x |
| 49 | Eurasian Wigeon | x |
| 50 | American Wigeon | x |
| 51 | Gadwall | x |
| 52 | Eurasian Teal | x |
| 53 | Green-winged Teal | |
| 54 | Mallard | x |
| 55 | Northern Pintail | x |
| 56 | Garganey | x |
| 57 | Blue-winged Teal | x |
| 58 | Northern Shoveler | x |
| 59 | Red-crested Pochard | x |
| 60 | Common Pochard | x |
| 61 | Ring-necked Duck | x |
| 62 | Ferruginous Duck | x |
| 63 | Tufted Duck | x |
| 64 | Greater Scaup | x |
| 65 | Lesser Scaup | x |
| 66 | Common Eider | |
| 67 | King Eider | |
| 68 | Long-tailed Duck | x |
| 69 | Black Scoter | x |
| 70 | Surf Scoter | |
| 71 | Velvet Scoter | x |
| 72 | Common Goldeneye | x |
| 73 | Smew | x |
| 74 | Red-breasted Merganser | x |
| 75 | Goosander | x |
| 76 | Ruddy Duck | x |
| 77 | European Honey-buzzard | x |
| 78 | Black Kite | |
| 79 | Red Kite | x |
| 80 | White-tailed Eagle | |
| 81 | Eurasian Marsh Harrier | x |
| 82 | Hen Harrier | x |
| 83 | Montagu's Harrier | x |
| 84 | Northern Goshawk | x |
| 85 | Eurasian Sparrowhawk | x |
| 86 | Common Buzzard | x |
| 87 | Rough-legged Buzzard | |
| 88 | Golden Eagle | |
| 89 | Osprey | x |
| 90 | Common Kestrel | x |
| 91 | Red-footed Falcon | x |
| 92 | Merlin | x |
| 93 | Eurasian Hobby | x |
| 94 | Gyr Falcon | |
| 95 | Peregrine Falcon | x |
| 96 | Red-legged Partridge | x |
| 97 | Grey Partridge | x |
| 98 | Common Quail | x |
| 99 | Common Pheasant | x |
| 100 | Ring-necked Pheasant | x |
| 101 | Water Rail | x |
| 102 | Spotted Crake | x |
| 103 | Little Crake | |
| 104 | Baillon's Crake | |
| 105 | Corn Crake | x |
| 106 | Common Moorhen | x |
| 107 | Common Coot | x |
| 108 | Common Crane | |
| 109 | Little Bustard | |
| 110 | Great Bustard | |
| 111 | Eurasian Oystercatcher | x |
| 112 | Black-winged Stilt | |
| 113 | Pied Avocet | x |
| 114 | Stone-curlew | |
| 115 | Collared Pratincole | |
| 116 | Black-winged Pratincole | |
| 117 | Little Plover | x |
| 118 | Ringed Plover | x |
| 119 | Tundra Ringed Plover | x |
| 120 | Killdeer | |
| 121 | Kentish Plover | |
| 122 | Eurasian Dotterel | x |
| 123 | Pacific Golden Plover | |
| 124 | European Golden Plover | x |
| 125 | Northern Golden Plover | x |
| 126 | Grey Plover | x |
| 127 | Sociable Lapwing | |
| 128 | Northern Lapwing | x |
| 129 | Red Knot | x |
| 130 | Sanderling | x |
| 131 | Little Stint | x |
| 132 | Temminck's Stint | x |
| 133 | Least Sandpiper | |
| 134 | White-rumped Sandpiper | |
| 135 | Baird's Sandpiper | |
| 136 | Pectoral Sandpiper | |
| 137 | Curlew Sandpiper | x |
| 138 | Purple Sandpiper | |
| 139 | Dunlin | x |
| 140 | Dunlin | |
| 141 | Broad-billed Sandpiper | |
| 142 | Stilt Sandpiper | |
| 143 | Buff-breasted Sandpiper | |
| 144 | Ruff | x |
| 145 | Jack Snipe | x |
| 146 | Common Snipe | x |
| 147 | Great Snipe | |
| 148 | Eurasian Woodcock | x |
| 149 | Black-tailed Godwit | x |
| 150 | Icelandic Black-tailed Godwit | x |
| 151 | Bar-tailed Godwit | x |
| 152 | Whimbrel | x |
| 153 | Eurasian Curlew | x |
| 154 | Upland Sandpiper | |
| 155 | Spotted Redshank | x |
| 156 | Common Redshank | x |
| 157 | Icelandic Redshank | |
| 158 | Marsh Sandpiper | |
| 159 | Common Greenshank | x |
| 160 | Greater Yellowlegs | |
| 161 | Lesser Yellowlegs | x |
| 162 | Green Sandpiper | x |
| 163 | Wood Sandpiper | x |
| 164 | Common Sandpiper | x |
| 165 | Spotted Sandpiper | x |
| 166 | Ruddy Turnstone | x |
| 167 | Wilson's Phalarope | |
| 168 | Red-necked Phalarope | x |
| 169 | Grey Phalarope | |
| 170 | Pomarine Skua | |
| 171 | Arctic Skua | x |
| 172 | Long-tailed Skua | |
| 173 | Great Skua | x |
| 174 | Mediterranean Gull | x |
| 175 | Little Gull | x |
| 176 | Sabine's Gull | |
| 177 | Black-headed Gull | x |
| 178 | Ring-billed Gull | |
| 179 | Mew Gull | x |
| 180 | Lesser Black-backed Gull | x |
| 181 | Lesser Black-backed Gull | x |
| 182 | Herring Gull | x |
| 183 | Scandinavian Herring Gull | x |
| 184 | Western Yellow-legged Gull | x |
| 185 | Caspian Gull | x |
| 186 | Iceland Gull | x |
| 187 | Kumlien's Gull | |
| 188 | Glaucous Gull | x |
| 189 | Great Black-backed Gull | x |
| 190 | Black-legged Kittiwake | x |
| 191 | Ivory Gull | |
| 192 | Caspian Tern | |
| 193 | Sandwich Tern | x |
| 194 | Roseate Tern | |
| 195 | Common Tern | x |
| 196 | Arctic Tern | x |
| 197 | Little Tern | x |
| 198 | Whiskered Tern | x |
| 199 | Black Tern | x |
| 200 | White-winged Tern | x |
| 201 | Common Guillemot | |
| 202 | Razorbill | |
| 203 | Little Auk | |
| 204 | Atlantic Puffin | |
| 205 | Pallas's Sandgrouse | |
| 206 | Feral Pigeon | x |
| 207 | Stock Pigeon | x |
| 208 | Common Wood Pigeon | x |
| 209 | Eurasian Collared Dove | x |
| 210 | European Turtle Dove | x |
| 211 | Rose-ringed Parakeet | x |
| 212 | Common Cuckoo | x |
| 213 | Barn Owl | x |
| 214 | Dark-breasted Barn Owl | |
| 215 | Little Owl | x |
| 216 | Tawny Owl | x |
| 217 | Long-eared Owl | x |
| 218 | Short-eared Owl | x |
| 219 | European Nightjar | |
| 220 | Common Swift | x |
| 221 | Alpine Swift | |
| 222 | Common Kingfisher | x |
| 223 | Blue-cheeked Bee-eater | |
| 224 | European Bee-eater | |
| 225 | European Roller | |
| 226 | Hoopoe | x |
| 227 | Eurasian Wryneck | |
| 228 | Green Woodpecker | x |
| 229 | Great Spotted Woodpecker | x |
| 230 | Lesser Spotted Woodpecker | x |
| 231 | Greater Short-toed Lark | |
| 232 | Wood Lark | |
| 233 | Sky Lark | x |
| 234 | Horned Lark | |
| 235 | Sand Martin | x |
| 236 | Barn Swallow | x |
| 237 | Red-rumped Swallow | |
| 238 | House Martin | x |
| 239 | Richard's Pipit | |
| 240 | Tawny Pipit | |
| 241 | Tree Pipit | x |
| 242 | Meadow Pipit | x |
| 243 | Red-throated Pipit | |
| 244 | Rock Pipit | |
| 245 | Scandinavian Rock Pipit | x |
| 246 | Water Pipit | x |
| 247 | Yellow Wagtail | x |
| 248 | Blue-headed Wagtail | x |
| 249 | Grey-headed Wagtail | |
| 250 | Spanish Wagtail | |
| 251 | Ashy-headed Wagtail | x |
| 252 | Skyes Wagtail | x |
| 253 | Grey Wagtail | x |
| 254 | Pied Wagtail | x |
| 255 | White Wagtail | x |
| 256 | Bohemian Waxwing | x |
| 257 | White-throated Dipper | |
| 258 | Winter Wren | x |
| 259 | Hedge Accentor | x |
| 260 | Alpine Accentor | |
| 261 | European Robin | x |
| 262 | Continental Robin | x |
| 263 | Thrush Nightingale | |
| 264 | Common Nightingale | x |
| 265 | Bluethroat | |
| 266 | White spotted Bluethroat | |
| 267 | Black Redstart | x |
| 268 | Common Redstart | x |
| 269 | Whinchat | x |
| 270 | Stonechat | x |
| 271 | Siberian Stonchat | |
| 272 | Northern Wheatear | x |
| 273 | Greenland Wheatear | x |
| 274 | Ring Ouzel | x |
| 275 | Common Blackbird | x |
| 276 | Dark-throated Thrush | |
| 277 | Fieldfare | x |
| 278 | Song Thrush | x |
| 279 | Continental Song Thrush | |
| 280 | Redwing | x |
| 281 | Mistle Thrush | x |
| 282 | Cetti's Warbler | x |
| 283 | Common Grasshopper Warbler | x |
| 284 | River Warbler | |
| 285 | Savi's Warbler | |
| 286 | Moustached Warbler | |
| 287 | Aquatic Warbler | |
| 288 | Sedge Warbler | x |
| 289 | Marsh Warbler | |
| 290 | Eurasian Reed Warbler | x |
| 291 | Great Reed Warbler | |
| 292 | Icterine Warbler | |
| 293 | Dartford Warbler | |
| 294 | Barred Warbler | |
| 295 | Lesser Whitethroat | x |
| 296 | Eastern Lesser Whitethroat | |
| 297 | Common Whitethroat | x |
| 298 | Garden Warbler | x |
| 299 | Blackcap | x |
| 300 | Pallas's Leaf Warbler | |
| 301 | Yellow-browed Warbler | |
| 302 | Wood Warbler | x |
| 303 | Common Chiffchaff | x |
| 304 | Scandinavian Chiffchaff | |
| 305 | Siberian Chiffchaff | p |
| 306 | Willow Warbler | x |
| 307 | Goldcrest | x |
| 308 | Firecrest | x |
| 309 | Spotted Flycatcher | x |
| 310 | Pied Flycatcher | x |
| 311 | Bearded Tit | x |
| 312 | Long-tailed Tit | x |
| 313 | Marsh Tit | |
| 314 | Willow Tit | x |
| 315 | Coal Tit | x |
| 316 | Continental Coal Tit | |
| 317 | Blue Tit | x |
| 318 | Great Tit | x |
| 319 | Wood Nuthatch | x |
| 320 | Eurasian Treecreeper | x |
| 321 | Eurasian Penduline Tit | |
| 322 | Eurasian Golden Oriole | x |
| 323 | Isabelline Shrike | |
| 324 | Red-backed Shrike | |
| 325 | Great Grey Shrike | x |
| 326 | Woodchat Shrike | |
| 327 | Eurasian Jay | x |
| 328 | Black-billed Magpie | x |
| 329 | Spotted Nutcracker | |
| 330 | Eurasian Jackdaw | x |
| 331 | Nordic Jackdaw | |
| 332 | Rook | x |
| 333 | Carrion Crow | x |
| 334 | Hooded Crow | |
| 335 | Common Raven | |
| 336 | Common Starling | x |
| 337 | Rosy Starling | |
| 338 | House Sparrow | x |
| 339 | Eurasian Tree Sparrow | x |
| 340 | Chaffinch | x |
| 341 | Continental Chaffinch | |
| 342 | Brambling | x |
| 343 | European Serin | p |
| 344 | European Greenfinch | x |
| 345 | European Goldfinch | x |
| 346 | Eurasian Siskin | x |
| 347 | Common Linnet | x |
| 348 | Twite | x |
| 349 | Lesser Redpoll | x |
| 350 | Mealy Redpoll | |
| 351 | Arctic Redpoll | |
| 352 | Common Crossbill | x |
| 353 | Common Bullfinch | x |
| 354 | Northern Bullfinch | |
| 355 | Hawfinch | |
| 356 | Lapland Longspur | x |
| 357 | Snow Bunting | x |
| 358 | Yellowhammer | x |
| 359 | Cirl Bunting | |
| 360 | Rustic Bunting | |
| 361 | Reed Bunting | x |
| 362 | Black-headed Bunting | |
| 363 | Corn Bunting | x |