BTO Species Codes

Enter the British Trust for Ornithology short-hand one or two-letter codes for UK bird species.

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Last updated: May 28, 2025

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First submitted	May 28, 2025
Times taken	11
Average score	48.7%
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Hint	Answer
Arctic Skua	AC
Arctic Tern	AE
Avocet	AV
Barn Owl	BO
Barnacle Goose	BY
Bar-tailed Godwit	BA
Bearded Tit	BR
Berwick's Swan	BS
Bittern	BI
Black Grouse	BK
Black Guillemot	TY
Black Redstart	BX
Black Tern	BJ
Blackbird	B.
Blackcap	BC
Black-headed Gull	BH
Black-necked Grebe	BN
Black-tailed Godwit	BW
Black-throated Diver	BV
Blue Tit	BT
Bluethroat	BU
Brambling	BL
Brent Goose	BG
Bullfinch	BF
Buzzard	BZ
Canada Goose	CG
Cappercaillie	CP
Carrion Crow	C.
Cetti's Warbler	CW
Chaffinch	CH
Chiffchaff	CC
Chough	CF
Cirl Bunting	CL
Coal Tit	CT
Collared Dove	CD
Common Gull	CM
Common Sandpiper	CS
Common Scoter	CX
Common Tern	CN
Coot	CO
Cormorant	CA
Corn Bunting	CB
Corn Crake	CE
Crested Tit	CI
Crossbill (Common)	CR
Cuckoo	CK
Curlew	CU
Dartford Warbler	DW
Dipper	DI
Dotterel	DO
Dunlin	DN
Dunnock	D.
Egyptian Goose	EG
Feral Pigeon	FP
Feral/hybrid goose	ZL
Feral/hybrid mallard type	ZF
Fieldfare	FF
Firecrest	FC
Fulmar	F.
Gadwall	GA
Gannet	GX
Garden Warbler	GW
Garganey	GY
Golden Eagle	EA
Golden Oriole	OL
Golden Pheasant	GF
Golden Plover	GP
Goldeneye	GN
Goldfinch	GO
Goosander	GD
Goshawk	GI
Grasshopper Warbler	GH
Great Black-backed Gull	GB
Great Crested Grebe	GG
Great Northern Diver	ND
Great Skua	NX
Great Spotted Woodpecker	GS
Great Tit	GT
Green Sandpiper	GE
Green Woodpecker	G.
Greenfinch	GR
Greenshank	GK
Grey Heron	H.
Grey Partridge	P.
Grey Plover	GV
Grey Wagtail	GL
Greylag Goose	GJ
Guillemot	GU
Guineafowl (Helmeted)	FW
Hawfinch	HF
Hen Harrier	HH
Herring Gull	HG
Hobby	HY
Honey Buzzard	HZ
Hooded Crow	HC
Hoopoe	HP
House Martin	HM
House Sparrow	HS
Jackdaw	JD
Jay	J.
Kestrel	K.
Kingfisher	KF
Kittiwake	KI
Knot	KN
Lady Amherst's Pheasant	LM
Lapland Bunting	LA
Lapwing	L.
Leach's Petrel	TL
Lesser Black-backed Gull	LB
Lesser Spotted Woodpecker	LS
Lesser Whitethroat	LW
Linnet	LI
Little Egret	ET
Little Grebe	LG
Little Gull	LU
Little Owl	LO
Little Ringed Plover	LP
Little Tern	AF
Long-eared Owl	LE

Hint	Answer
Long-tailed Tit	LT
Magpie	MG
Mallard	MA
Mandarin Duck	MN
Manx Shearwater	MX
Marsh Harrier	MR
Marsh Tit	MT
Marsh Warbler	MW
Meadow Pipit	MP
Mediterranean Gull	MU
Merlin	ML
Mistle Thrush	M.
Montagu's Harrier	MO
Moorhen	MH
Mute Swan	MS
Nightingale	N.
Nightjar	NJ
Nuthatch	NH
Osprey	OP
Oystercatcher	OC
Peafowl/Peacock	PX
Peregrine	PE
Pheasant	PH
Pied Flycatcher	PF
Pied Wagtail	PW
Pink-footed Goose	PG
Pintail	PT
Pochard	PO
Ptarmigan	PM
Puffin	PU
Purple Sandpiper	PS
Quail	Q.
Raven	RN
Razorbill	RA
Red Grouse	RG
Red Kite	KT
Red-backed Shrike	ED
Red-breasted Merganser	RM
Red-crested Pochard	RQ
Red-footed Falcon	FV
Red-legged Partridge	RL
Red-necked Phalarope	NK
Redpoll (Lesser)	LR
Redshank	RK
Redstart	RT
Red-throated Diver	RH
Redwing	RE
Reed Bunting	RB
Reed Warbler	RW
Ring Ouzel	RZ
Ringed Plover	RP
Ring-necked Parakeet	RI
Robin	R.
Rock Dove (not feral)	DV
Rock Pipit	RC
Rook	RO
Roseate Tern	RS
Ruddy Duck	RY
Ruff	RU
Sand Martin	SM
Sanderling	SS
Sandwich Tern	TE
Savi's Warbler	VI
Scarlet Rosefinch	SQ
Scaup	SP
Scottish Crossbill	CY
Sedge Warbler	SW
Serin	NS
Shag	SA
Shelduck	SU
Shorelark	SX
Short-eared Owl	SE
Shoveler	SV
Siskin	SK
Skylark	S.
Slavonian Grebe	SZ
Snipe	SN
Snow Bunting	SB
Song Thrush	ST
Sparrowhawk	SH
Spotted Crake	AK
Spotted Flycatcher	SF
Spotted Redshank	DR
Starling	SG
Stock Dove	SD
Stonechat	SC
Stone-curlew	TN
Storm Petrel	TM
Swallow	SL
Swift	SI
Tawny Owl	TO
Teal	T.
Temminck's Stint	TK
Tree Pipit	TP
Tree Sparrow	TS
Treecreeper	TC
Tufted Duck	TU
Turnstone	TT
Turtle Dove	TD
Twite	TW
Water Rail	WA
Wheatear	W.
Whimbrel	WM
Whinchat	WC
White-fronted Goose	WG
Whitethroat	WH
Whooper Swan	WS
Wigeon	WN
Willow Tit	WT
Willow Warbler	WW
Wood Sandpiper	OD
Wood Warbler	WO
Woodcock	WK
Woodlark	WL
Woodpigeon	WP
Wren	WR
Wryneck	WY
Yellow Wagtail	YW
Yellowhammer	Y.