BBS

Number of 1km squares in which each species
was recorded in South East England

These figures show the total number of squares in which a given species was recorded at least once in a particular year. They provide as useful indication of which species are widely distributed and which have more restricted distributions. For comparative purposes the data can be used to calculate the frequency of occurrence of each species by dividing the number of squares occupied by the total number of squares surveyed. This measure has the advantage that it can be used to compare results based on different numbers of squares. Particular care should be taken in interpreting such results where only a few squares could be surveyed (fewer than 30-50 squares). While these figures may provide a general indication of major changes in distributions over time they do not provide a statistically robust measure of such changes because they do not take account of the BBS sampling strategy or of temporal variation in the sample of squares surveyed.
BBS trend analyses are available here

Species	94	95	96	97	98	99	00	01	02	03	04	05	06	07	08	09
Total No squares surveyed	233	266	277	325	356	389	435	198	425	440	450	520	593	629	588	594
Mute Swan	19	26	30	37	40	43	47	27	51	54	56	64	74	78	77	67
Black Swan	.	.	.	.	1	1	2	1	2	1	2	2	2	2	2	2
Whooper Swan	.	.	.	.	.	.	.	.	1	1	.	.	1	.	1	.
1017	.	.	.	.	.	.	.	.	.	.	.	.	.	1	.	.
Pink-footed Goose	.	.	.	.	1	.	.	.	.	.	.	.	.	.	.	.
White-fronted Goose	.	.	.	.	.	1	.	.	.	.	.	.	.	.	.	.
Greylag Goose	7	12	16	15	18	21	25	3	21	27	28	35	41	39	36	40
Feral/hybrid Goose	.	.	.	.	1	.	2	1	1	.	.	4	4	3	3	2
Bar-headed Goose	.	.	.	.	.	.	1	.	.	.	1	.	.	1	.	.
Snow Goose	1	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.
Canada Goose	40	56	64	75	77	100	113	29	104	112	122	122	131	143	124	130
Barnacle Goose	.	.	1	1	1	1	1	.	.	1	2	2	2	2	2	.
Brent Goose	.	.	1	.	1	.	1	.	1	.	.	.	2	2	.	1
Egyptian Goose	.	.	.	.	.	1	.	1	.	2	2	7	7	8	5	7
Ruddy Shelduck	.	.	.	.	.	.	.	.	.	.	.	.	1	.	.	.
Shelduck	14	14	15	16	22	19	23	8	16	17	21	26	27	29	23	27
Australian Shelduck	.	.	1	.	.	.	.	.	.	.	.	.	.	.	.	.
Muscovy Duck	.	.	.	1	.	1	.	.	2	.	.	.	.	.	.	.
Carolina Wood Duck	.	.	1	.	.	.	.	.	.	.	1	.	.	.	1	.
Mandarin	4	2	.	1	4	8	9	4	9	8	17	10	21	16	23	22
Wigeon	.	.	1	.	.	.	2	1	1	1	3	1	2	3	4	3
Gadwall	2	4	4	4	7	10	13	6	9	10	15	20	16	17	12	18
Teal	.	5	1	4	2	3	3	1	3	4	5	7	10	6	6	3
Mallard	105	117	128	146	173	180	221	85	210	213	216	259	283	310	300	290
Feral/hybrid mallard type	.	.	.	1	.	.	.	.	2	1	6	6	3	9	7	7
Pintail	.	.	.	.	.	.	.	.	.	.	.	.	.	2	.	.
Garganey	.	.	.	.	.	.	.	.	.	.	.	1	.	.	1	1
Shoveler	4	4	1	3	3	5	6	1	5	5	5	10	4	4	4	7
Red-crested Pochard	.	.	.	.	.	.	.	.	1	.	.	.	.	.	.	.
Pochard	5	4	4	6	3	7	7	2	5	4	6	9	9	7	6	5
Tufted Duck	14	18	15	15	16	24	32	12	25	29	26	34	34	34	39	39
Scaup	.	.	.	.	1	.	.	.	.	.	.	.	.	.	.	.
Eider	.	.	.	1	.	.	.	.	.	.	.	.	.	.	1	.
Long-tailed Duck	.	.	1	.	.	.	.	.	.	.	.	.	.	.	.	.
Goldeneye	1	1	.	.	.	.	.	1	1	.	.	.	.	.	.	.
Red-breasted Merganser	.	.	.	.	.	.	.	.	.	.	1	.	1	.	1	.
Goosander	.	2	1	2	.	2	.	.	1	4	1	1	1	2	1	1
Ruddy Duck	1	1	1	.	.	.	.	.	3	2	2	6	4	2	2	1
Helmeted Guineafowl	.	.	1	.	1	.	.	.	.	1	1	.	3	2	5	4
Red Grouse	.	.	.	.	.	.	1	.	.	.	.	.	.	.	.	.
Capercaillie	.	.	.	.	.	.	.	.	.	.	.	.	1	.	.	.
Red-legged Partridge	33	40	58	64	78	76	84	29	96	109	137	165	174	164	158	145
Grey Partridge	30	25	31	40	29	27	46	9	45	36	35	51	34	34	31	20
Quail	.	3	3	4	5	2	.	.	2	3	2	4	3	2	3	1
Reeves Pheasant	.	.	.	.	.	.	.	.	1	.	1	.	.	.	.	.
Pheasant	170	194	214	245	268	292	344	121	339	357	366	421	482	515	482	485
Golden Pheasant	.	.	1	.	1	.	.	.	.	.	1	.	.	.	.	.
Peafowl	1	1	1	1	.	1	3	.	.	1	2	6	8	10	10	10
Red-throated Diver	.	.	.	.	1	.	1	.	.	.	.	.	.	.	.	.
Little Grebe	3	7	8	8	10	14	21	9	21	19	22	18	20	17	22	27
Great Crested Grebe	6	6	6	6	5	6	11	9	11	13	12	21	17	16	15	15
Black-necked Grebe	.	.	.	1	.	.	.	.	.	.	.	.	.	.	.	.
Fulmar	1	1	.	1	3	2	1	.	1	1	1	1	3	3	4	3
Gannet	2	1	.	1	1	1	.	.	.	1	2	1	2	1	2	1
Cormorant	8	16	14	16	23	21	42	18	44	42	51	58	72	80	69	69
Shag	1	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.
Little Egret	.	.	.	.	.	.	1	3	6	7	13	16	15	16	20	19
Grey Heron	52	65	61	75	83	98	119	55	117	125	114	161	141	172	164	152
Glossy Ibis	.	.	.	.	.	.	.	.	.	.	1	.	.	.	.	.
Honey Buzzard	.	.	.	.	.	.	1	.	.	.	.	.	.	.	1	.
Red Kite	1	2	3	3	4	7	9	5	18	29	32	46	57	78	76	99
Marsh Harrier	1	1	4	1	5	2	3	.	4	3	2	4	4	4	6	8
Hen Harrier	.	.	.	.	.	2	1	.	.	.	.	1	.	.	.	1
Montagus Harrier	.	.	1	.	1	.	1	.	.	.	1	.	1	.	.	.
Goshawk	1	.	.	.	.	1	1	.	1	.	1	.	.	.	.	1
Sparrowhawk	35	35	35	51	63	55	63	30	63	72	68	90	87	84	94	66
1354	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	1
Buzzard	11	14	10	24	37	39	55	19	79	103	115	137	172	197	228	246
Osprey	1	.	.	1	.	.	.	.	1	.	.	.	.	.	.	.
Kestrel	83	84	68	95	121	106	119	52	124	154	104	155	176	164	212	150
Merlin	.	.	.	.	.	.	.	.	.	.	1	.	.	.	1	1
Hobby	6	7	7	11	10	12	16	9	12	14	13	18	13	13	11	24
Peregrine	1	1	1	2	2	4	2	1	3	2	6	2	1	8	6	6
Water Rail	1	.	1	.	1	1	.	.	1	1	2	3	3	.	1	1
Corncrake	.	1	.	.	.	1	.	.	.	.	.	.	.	.	1	.
Moorhen	72	85	80	92	108	128	157	64	149	138	142	167	192	194	178	195
Coot	22	29	29	36	45	50	61	31	54	64	57	77	84	88	80	80
Oystercatcher	6	6	8	10	8	10	9	3	9	8	11	11	13	15	17	20
Avocet	1	2	2	3	3	4	2	1	3	4	2	4	3	.	2	4
Stone-curlew	.	.	.	.	.	.	.	.	1	.	.	.	.	1	1	.
Little Ringed Plover	.	2	.	.	1	.	1	1	.	3	1	2	1	1	3	3
Ringed Plover	3	3	3	2	4	4	5	2	3	6	2	6	5	3	2	2
Golden Plover	.	.	.	.	2	.	2	.	1	3	1	.	1	2	1	.
Grey Plover	.	1	.	1	.	1	1	.	.	.	.	.	1	.	.	1
Lapwing	67	72	90	80	87	85	125	33	102	129	124	135	127	128	121	115
Dunlin	.	1	1	.	1	1	2	3	2	1	.	1	.	.	3	.
Ruff	.	1	.	.	.	.	.	.	.	.	.	.	.	.	.	.
Snipe	2	5	3	4	4	4	3	.	4	6	5	2	6	2	6	5
Woodcock	.	1	.	.	1	1	.	.	3	3	2	2	1	5	2	.
Black-tailed Godwit	1	.	.	.	.	.	1	.	1	.	1	1	3	1	.	1
Bar-tailed Godwit	.	1	1	.	1	.	.	.	.	1	.	.	.	2	.	.
Whimbrel	3	3	4	3	4	4	1	1	3	.	3	1	7	4	7	1
Curlew	13	11	8	9	11	17	18	6	17	15	14	14	19	24	21	24
Common Sandpiper	2	2	2	3	1	1	5	1	2	5	.	2	2	1	.	.
Green Sandpiper	.	.	1	.	1	.	1	.	2	2	1	2	1	3	2	1
Spotted Redshank	.	.	.	.	.	1	.	.	.	.	.	.	.	.	.	.
Greenshank	.	.	1	4	.	3	2	1	1	1	.	2	.	3	1	2
Redshank	7	10	10	13	13	15	16	5	15	14	19	20	16	20	18	17
Turnstone	.	.	.	1	.	.	2	.	.	.	.	1	1	3	2	.
Kittiwake	.	.	.	.	.	1	.	.	.	.	.	.	.	.	.	.
Black-headed Gull	42	49	48	56	62	56	67	27	71	54	65	87	113	133	115	127
Mediterranean Gull	.	.	.	.	1	2	2	.	5	3	3	1	8	10	9	9
Common Gull	6	3	4	3	6	10	9	4	2	6	1	9	15	17	13	13
Lesser Black-backed Gull	13	13	18	24	25	27	23	11	37	39	41	52	58	76	66	78
Herring Gull	19	24	29	43	66	63	79	34	64	80	73	117	157	173	149	148
Yellow-legged Gull	1	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.
Great Black-backed Gull	1	.	2	3	.	3	3	2	3	5	7	10	14	16	7	13
Little Tern	.	1	1	.	2	2	.	.	2	.	1	1	.	1	1	1
Black Tern	.	.	1	.	.	.	.	.	.	.	.	.	.	.	.	.
Sandwich Tern	1	1	.	1	2	1	2	1	2	1	2	5	5	6	3	4
Common Tern	6	6	2	7	11	8	15	4	18	16	12	26	24	27	18	22
Guillemot	.	.	.	.	1	.	.	.	.	.	.	.	.	.	.	.
Rock Dove	.	.	.	.	.	.	.	.	.	.	.	.	1	.	.	.
Feral Pigeon	57	85	75	85	107	110	111	57	106	106	101	121	136	129	115	139
Stock Dove	103	121	106	129	155	177	177	73	176	182	173	197	216	230	200	221
Woodpigeon	231	263	276	319	350	383	430	195	421	436	444	514	589	619	585	591
Collared Dove	151	166	172	210	227	252	280	119	257	270	278	332	373	384	355	356
Turtle Dove	41	43	57	55	77	63	72	25	60	57	57	60	49	57	41	51
Alexandrine Parakeet	.	.	1	.	.	1	.	.	.	.	.	.	.	.	.	.
Ring-necked Parakeet	4	4	4	6	5	13	18	10	21	27	36	35	42	50	46	38
Cuckoo	125	154	143	172	169	187	199	65	147	154	181	168	200	182	163	176
Barn Owl	2	.	.	2	3	1	.	3	2	8	7	13	16	10	12	20
Little Owl	17	16	18	25	21	26	30	9	21	27	23	28	26	35	31	29
Tawny Owl	16	11	11	18	13	15	22	6	19	23	20	28	23	34	24	24
Long-eared Owl	.	.	1	.	.	.	.	.	1	.	.	2	.	.	.	1
Short-eared Owl	.	.	.	.	1	.	.	.	.	1	.	.	1	.	.	.
Nightjar	.	1	.	.	.	.	.	.	1	1	1	2	2	2	3	1
Swift	125	118	122	121	156	156	180	97	164	171	166	203	198	203	205	204
Kingfisher	4	12	9	8	9	11	7	1	8	18	12	14	15	15	14	11
Hoopoe	.	.	.	.	.	.	.	.	1	.	1	1	.	.	1	.
Wryneck	.	.	.	.	.	.	.	.	.	.	1	.	.	.	.	.
Green Woodpecker	128	144	150	179	229	260	280	104	266	273	291	338	386	407	391	384
Great Spotted Woodpecker	100	134	138	141	186	205	237	92	234	277	281	341	391	394	398	401
Lesser Spotted Woodpecker	10	4	8	8	7	8	11	4	5	10	10	10	10	11	17	6
Woodlark	4	4	5	5	5	4	9	6	7	7	7	11	13	18	14	15
Skylark	164	189	203	227	254	265	290	117	283	282	294	349	384	393	368	367
Sand Martin	5	8	11	7	5	7	13	10	12	13	8	11	11	14	7	5
Swallow	157	161	175	212	231	253	300	108	264	271	278	351	404	395	386	397
House Martin	100	105	107	124	121	127	171	77	147	151	152	173	209	171	172	158
Tree Pipit	15	11	11	11	16	13	18	10	11	10	14	14	16	13	17	10
Meadow Pipit	24	27	35	42	45	41	45	11	38	42	49	71	67	60	62	56
Rock Pipit	.	1	1	.	1	1	1	2	.	.	1	1	.	1	1	2
Yellow Wagtail	21	22	30	25	20	25	24	8	26	24	23	23	26	19	21	20
Grey Wagtail	14	12	14	15	16	20	20	13	23	27	23	26	32	47	33	30
Pied Wagtail	104	116	123	129	152	187	197	80	199	217	209	239	251	266	229	251
Waxwing	.	.	.	.	.	.	.	.	.	.	.	1	.	.	.	.
Wren	224	255	262	298	328	363	411	181	409	423	418	494	555	594	557	557
Dunnock	200	239	243	265	301	340	387	161	359	388	389	462	515	542	492	513
Robin	221	252	263	304	327	368	412	181	405	424	430	505	566	604	564	574
Nightingale	10	11	11	18	18	22	23	3	17	11	9	19	16	27	24	17
Black Redstart	1	.	.	.	1	1	1	.	.	.	1	.	1	.	1	.
Redstart	.	2	1	4	2	2	9	6	8	8	10	10	14	13	7	7
Whinchat	4	1	5	3	2	2	.	1	3	3	1	2	2	4	.	2
Stonechat	8	7	6	6	9	13	10	6	11	13	12	14	19	19	16	15
Wheatear	6	10	11	12	6	12	13	4	16	14	17	24	29	26	27	25
Ring Ouzel	.	.	.	.	.	.	.	.	.	2	.	1	1	2	1	1
Blackbird	229	261	274	321	351	382	429	196	419	436	445	515	590	621	582	589
Fieldfare	.	4	5	4	3	6	3	1	5	22	11	3	10	1	8	3
Song Thrush	200	231	245	273	293	318	366	164	372	393	392	452	520	527	510	516
Redwing	.	1	2	.	1	.	.	.	4	6	3	1	.	1	2	.
Mistle Thrush	152	170	171	188	211	225	242	84	237	241	246	265	268	280	252	251
Cettis Warbler	1	1	3	2	2	4	4	1	6	4	5	11	15	14	21	20
Grasshopper Warbler	3	4	1	4	3	3	4	1	1	2	4	4	4	6	4	8
Sedge Warbler	16	15	22	25	30	25	44	20	38	30	37	40	45	42	44	43
Marsh Warbler	.	.	.	.	1	.	.	.	.	.	1	.	1	.	.	.
Reed Warbler	9	12	20	21	29	24	30	15	25	27	28	41	42	42	42	48
Blackcap	159	178	176	232	274	307	338	148	335	329	361	401	466	451	429	473
Garden Warbler	53	66	76	77	99	90	101	37	82	85	82	103	105	118	117	129
Lesser Whitethroat	47	39	41	32	39	32	52	16	48	52	55	55	73	78	66	58
Whitethroat	118	137	183	193	200	215	259	107	270	258	283	312	373	371	346	360
Dartford Warbler	2	2	2	1	4	4	4	4	2	4	7	7	10	9	9	5
Wood Warbler	4	2	.	3	3	5	2	2	5	4	5	2	2	5	2	1
Chiffchaff	152	172	179	205	255	255	276	115	302	357	359	371	396	458	453	461
Willow Warbler	133	135	153	144	157	172	164	60	143	139	145	171	154	180	142	166
Goldcrest	89	100	102	109	114	148	175	75	171	195	178	215	235	251	245	194
Firecrest	2	1	.	.	1	1	2	3	3	3	1	3	4	7	6	4
Spotted Flycatcher	34	25	25	30	42	38	48	15	30	41	30	27	33	25	25	21
Pied Flycatcher	.	.	.	1	2	1	1	.	1	.	.	.	2	.	.	1
Bearded Tit	.	.	.	1	1	.	1	.	1	.	1	2	2	1	1	2
Long-tailed Tit	123	123	135	140	162	182	224	73	179	224	212	265	274	294	319	325
Blue Tit	225	257	267	310	340	374	414	185	408	429	435	507	578	609	564	575
Great Tit	222	242	255	297	322	357	408	166	393	417	426	490	570	593	557	553
Coal Tit	74	68	79	88	102	111	132	49	124	136	133	155	184	190	194	197
Willow Tit	12	14	15	13	16	11	11	5	7	9	6	10	10	10	7	8
Marsh Tit	28	29	31	32	43	40	50	18	52	51	52	56	64	67	64	61
Nuthatch	71	85	88	97	108	117	122	58	139	154	165	187	201	228	209	218
Treecreeper	57	54	59	62	65	86	73	23	72	85	64	94	99	102	103	100
Jay	121	120	121	152	145	168	178	78	207	206	217	240	278	294	297	278
Magpie	206	235	242	276	314	337	372	157	357	359	372	432	501	529	511	511
Jackdaw	163	172	184	226	242	267	302	126	299	304	332	384	432	478	444	466
Rook	129	152	154	160	170	184	206	67	205	197	218	254	305	323	299	297
Carrion Crow	216	247	253	299	337	369	413	181	400	419	434	492	569	604	563	577
Hooded Crow	.	.	.	.	.	1	.	.	.	.	.	.	.	.	.	.
Raven	.	.	.	.	1	.	1	.	1	1	4	.	8	5	7	11
Starling	208	237	240	280	292	333	342	145	317	311	306	372	394	440	386	367
House Sparrow	170	195	210	227	242	260	274	115	263	270	274	323	359	380	347	356
Tree Sparrow	13	16	13	10	5	9	10	.	5	6	5	3	5	5	9	5
Chaffinch	220	256	264	307	340	372	420	186	411	427	434	507	579	607	574	577
Brambling	1	.	.	2	1	1	4	.	1	3	2	.	3	2	1	.
Serin	.	.	.	.	.	.	.	.	.	.	.	.	.	1	.	.
Greenfinch	182	210	226	260	277	314	347	161	332	352	375	430	499	509	447	460
Goldfinch	148	163	182	181	211	209	257	105	245	264	277	322	353	384	377	401
Siskin	3	3	1	6	7	2	9	3	6	3	2	5	17	8	7	16
Linnet	138	156	161	198	198	210	227	94	211	244	230	241	228	243	228	243
Twite	.	.	.	.	1	.	.	.	.	.	.	.	1	.	.	1
Lesser Redpoll	9	7	9	8	14	4	3	2	6	7	6	8	13	3	3	11
Crossbill	3	.	.	3	6	.	5	2	1	11	5	3	10	3	6	3
Bullfinch	92	89	100	123	111	99	127	44	115	118	131	162	134	140	120	133
Hawfinch	.	1	.	.	.	.	2	.	.	1	.	.	1	1	1	1
Yellowhammer	152	168	172	199	207	211	242	83	228	228	233	256	290	304	277	284
Reed Bunting	36	39	40	47	30	48	48	24	52	59	55	75	82	79	72	77
Corn Bunting	27	24	29	30	25	33	22	15	25	31	21	27	38	36	35	33
Other cage bird species	.	.	.	.	.	.	.	.	1	.	.	.	.	.	.	.
Total number of Species	133	138	140	138	154	149	151	129	158	151	161	155	163	159	163	157

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The Breeding Bird Survey (BBS) monitors terrestrial birds throughout the UK to
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