BBS

Totals of individuals counted in Channel Isles

These figures are totals of the maximum counts recorded from each square in a given year. The maximum count is calculated for each species separately and is based on all birds seen and heard, including those in flight. These figures provide a useful indication of the relative abundance of different species, although they do not take account of differences in detectability between species. They do not provide measure of absolute abundance because BBS surveys do not detect all of the birds present in a particular square. For comparative purposes the data can be used to calculate the mean count per square by dividing the species totals in the table 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 abundance 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	1	1	7	6	7	7	7	7	7	7	11	13	19	16	15	16
Greylag Goose	.	.	.	.	.	.	.	.	.	.	1	.	1	.	.	1
Canada Goose	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	1
Brent Goose	.	.	.	.	.	.	.	.	1	.	.	37	.	.	.	.
Shelduck	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	3
Mandarin	.	.	.	.	.	.	.	.	.	.	.	1	.	.	.	1
Mallard	.	.	69	60	38	84	69	65	39	28	42	98	50	96	110	110
Feral/hybrid mallard type	.	.	.	.	.	.	.	.	.	.	.	.	10	.	.	.
Tufted Duck	.	.	2	4	3	3	1	4	.	2	.	5	.	.	5	.
Helmeted Guineafowl	.	.	.	.	.	.	.	.	.	.	.	6	2	.	.	.
Red-legged Partridge	.	.	.	.	.	.	.	.	.	1	2	1	2	1	.	.
Grey Partridge	2	2	2	.	.	.	2	2	.	.	2	.	.	.	2	.
Reeves Pheasant	.	.	.	.	.	.	.	.	.	.	.	.	4	.	.	.
Pheasant	.	.	11	14	11	16	33	34	43	39	62	99	128	147	88	112
Fulmar	.	.	.	.	.	.	.	.	.	.	1	2	36	2	10	30
Gannet	.	15	33	.	.	27	2	17	5	1	6	3	16	6	700	700
Cormorant	.	.	.	.	.	.	.	.	1	.	2	1	.	2	.	.
Shag	.	1	1	1	.	.	1	11	.	.	4	3	9	15	10	10
Little Egret	.	.	.	.	.	.	.	.	.	.	24	12	21	.	2	1
Grey Heron	.	.	1	.	2	1	.	1	2	1	4	5	4	2	1	10
Marsh Harrier	.	.	.	.	.	.	.	.	.	.	1	1	3	3	3	7
Sparrowhawk	.	.	2	1	2	2	1	1	2	.	1	1	4	2	4	1
Buzzard	.	.	.	.	1	.	.	.	.	.	1	.	2	1	.	1
Kestrel	1	.	7	2	5	5	4	7	3	4	3	6	15	15	12	16
Hobby	.	.	.	.	.	.	.	.	.	.	1	.	.	.	1	.
Peregrine	.	.	.	.	.	.	.	.	.	.	.	1	5	4	2	1
Moorhen	.	.	7	5	4	7	8	9	7	5	4	3	4	9	2	2
Coot	.	.	.	.	.	.	.	.	.	2	2	11	4	6	5	6
Oystercatcher	21	29	25	14	10	5	9	11	9	4	29	56	39	107	28	39
Ringed Plover	1	.	.	.	.	.	.	.	.	.	.	.	2	.	.	.
Sanderling	.	.	.	.	.	.	.	.	.	.	2	.	.	.	.	.
Bar-tailed Godwit	.	1	.	.	.	.	.	2	.	.	2	.	.	3	.	.
Whimbrel	.	9	1	2	.	.	3	1	.	.	1	.	1	1	.	2
Curlew	4	3	13	1	.	.	3	.	.	.	5	.	5	1	2	.
Turnstone	.	1	.	.	.	.	.	.	.	.	.	.	.	.	.	.
Black-headed Gull	.	18	2	.	.	.	3	.	.	.	16	.	52	4	4	.
Lesser Black-backed Gull	.	.	2	.	4	1	.	5	3	4	3	5	24	32	143	98
Herring Gull	8	10	107	116	131	119	136	92	115	116	284	397	490	479	577	610
Great Black-backed Gull	6	6	15	12	8	17	10	12	9	12	20	35	30	28	78	36
Sandwich Tern	.	.	.	.	.	.	.	.	.	.	.	.	1	.	.	.
Common Tern	28	3	.	.	.	6	1	8	.	6	10	4	.	.	.	.
Razorbill	.	.	1	.	.	.	.	.	.	.	.	.	.	.	.	.
Puffin	.	.	.	.	.	.	.	.	.	.	.	.	1	.	2	.
Feral Pigeon	.	1	68	69	75	28	23	10	15	48	208	63	227	121	228	89
Stock Dove	.	.	10	.	9	23	20	14	33	28	38	46	25	44	56	44
Woodpigeon	4	3	137	123	130	186	173	140	175	101	182	247	338	340	207	280
Collared Dove	.	.	35	40	73	50	41	34	51	69	62	101	133	120	116	101
Turtle Dove	.	.	5	7	4	4	5	1	12	.	9	3	1	1	.	.
Cuckoo	3	1	1	1	1	.	2	3	1	.	1	.	1	.	.	.
Swift	25	.	36	8	12	11	21	5	10	8	15	26	29	24	14	13
Great Spotted Woodpecker	.	.	3	2	.	6	5	4	4	2	4	13	11	11	6	2
Skylark	.	1	1	2	1	1	2	1	.	.	.	3	3	2	5	5
Sand Martin	.	.	.	.	1	1	.	.	.	.	.	.	.	.	.	2
Swallow	14	4	49	46	56	52	67	44	69	77	158	124	185	126	114	206
House Martin	2	.	51	16	45	96	84	38	62	38	40	70	35	15	9	13
Meadow Pipit	12	9	6	1	4	10	3	9	6	4	23	9	83	10	20	35
Rock Pipit	.	.	.	.	2	.	.	.	.	.	.	.	.	2	2	2
Yellow Wagtail	.	.	.	.	.	1	.	.	.	.	.	.	.	.	.	2
Grey Wagtail	.	.	.	.	.	.	.	.	2	.	.	.	.	.	.	.
Pied Wagtail	.	.	.	1	.	.	.	1	.	3	2	6	.	2	.	7
White Wagtail	.	.	.	.	.	.	.	.	.	.	.	.	.	.	3	.
Wren	13	9	136	113	153	178	172	148	184	165	174	221	320	245	168	223
Dunnock	2	3	60	39	45	56	35	37	26	31	40	46	81	72	52	64
Robin	.	1	64	51	56	49	66	59	52	60	77	86	113	94	97	98
Redstart	.	1	.	1	.	.	.	.	.	.	.	.	.	.	.	.
Whinchat	.	.	.	.	.	1	.	.	.	.	.	.	.	.	.	.
Stonechat	2	3	.	.	.	1	.	.	3	2	2	1	5	1	3	4
Wheatear	1	4	.	3	1	2	1	9	2	.	.	1	4	2	4	30
Blackbird	4	8	122	83	100	95	85	73	94	63	99	145	240	201	155	140
Song Thrush	.	.	34	25	27	24	21	15	19	9	17	15	25	29	14	26
Mistle Thrush	.	.	10	1	6	.	2	2	1	4	.	1	1	2	3	.
Cettis Warbler	.	.	.	.	.	.	.	.	.	.	.	.	.	1	.	.
Fan-tailed Warbler	.	.	.	.	.	.	.	.	.	.	.	.	3	.	.	.
Sedge Warbler	.	.	.	.	1	.	.	.	.	.	.	.	2	.	2	3
Reed Warbler	.	.	1	1	.	.	.	.	.	.	.	.	.	3	.	.
Blackcap	1	1	8	9	5	10	9	23	23	20	22	26	34	26	6	28
Garden Warbler	.	.	.	.	.	1	.	1	.	.	1	1	2	1	1	.
Lesser Whitethroat	.	.	.	.	.	.	.	.	.	.	.	.	.	1	.	.
Whitethroat	2	2	5	4	2	5	2	2	3	3	5	5	51	13	20	20
Dartford Warbler	.	.	.	.	.	.	.	.	.	.	.	.	8	15	2	1
Chiffchaff	1	9	47	30	45	49	42	45	40	38	44	42	66	79	36	57
Willow Warbler	.	.	3	3	.	4	1	5	2	.	1	1	6	9	.	3
Goldcrest	.	.	10	5	3	14	12	12	13	8	13	10	6	10	2	2
Spotted Flycatcher	.	.	2	1	2	4	3	1	.	.	.	.	.	.	.	.
Pied Flycatcher	.	.	.	.	.	.	.	.	.	.	.	.	1	.	.	.
Long-tailed Tit	.	.	6	1	1	7	4	3	18	17	7	16	22	10	9	7
Blue Tit	.	.	45	48	42	56	42	71	50	50	73	72	92	86	85	73
Great Tit	3	2	45	52	38	62	35	52	57	70	78	150	167	150	120	121
Coal Tit	.	.	.	.	.	.	.	.	9	.	2	.	.	.	.	.
Marsh Tit	.	.	.	.	.	.	.	.	.	.	.	.	.	.	.	1
Short-toed Treecreeper	.	.	5	6	2	5	4	3	6	2	6	5	7	.	1	1
Jay	.	.	4	3	3	4	1	2	5	4	9	14	12	13	10	9
Magpie	.	.	70	45	58	76	58	75	58	62	93	77	127	156	121	124
Jackdaw	.	.	.	.	.	.	.	.	.	.	1	.	34	9	10	8
Carrion Crow	4	4	69	50	60	58	44	89	74	75	86	146	220	245	155	166
Raven	.	.	.	.	.	.	.	.	1	1	.	.	3	.	14	2
Starling	11	70	189	117	84	108	57	95	116	74	202	179	222	184	149	146
House Sparrow	3	.	235	243	161	164	133	146	137	154	342	378	380	363	265	301
Chaffinch	1	.	35	27	19	28	34	33	35	41	42	79	123	122	117	98
Greenfinch	1	1	58	40	39	60	38	49	68	70	112	180	208	171	139	102
Goldfinch	.	1	44	48	28	44	18	27	23	25	52	55	67	46	32	48
Linnet	12	14	45	38	44	20	36	19	7	18	25	54	61	36	47	95
Bullfinch	.	.	3	.	.	3	3	1	.	2	.	2	4	1	2	2
Yellowhammer	.	.	4	2	2	1	1	1	2	1	1	.	.	.	.	.
Reed Bunting	.	.	.	.	.	.	.	.	.	.	.	.	.	.	1	.
Total number of Species	29	34	58	53	52	56	56	59	54	51	68	64	75	68	67	68

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