Herts Bird Club - WeBS 2018

The Wetland Bird Survey (WeBS) is organised nationally by the British Trust for Ornithology and supported by the WWT, RSPB and JNCC. Its principle aims are to identify population sizes, determine trends in numbers and distribution and to identify important sites for waterbirds across the UK.

In 2018 the Hertfordshire counts were organised by Cath Patrick (Lee Valley from Ware south) and Jim Terry (all other sites) and were undertaken by dedicated observers each month. Some sites are not surveyed during the summer months (April to August) but otherwise coverage is most comprehensive.

In 2018 the core count were the following Sundays: 21 Jan, 18 Feb, 18 Mar, 15 Apr, 20 May, 17 Jun, 15 Jul, 12 Aug, 9 Sep, 14 Oct, 11 Nov, 9 Dec. The scheme organisers have agreed that the Lee Valley counts can be undertaken the previous Saturday, and some counts were carried out on the previous or subsequent weekends.

Sincere thanks are due to everyone who contributes to this important monitoring project and especially to Cath and Jim for their co-ordination.

We are always looking for volunteers to assist with this national monitoring effort both to fill any gaps in the existing coverage but also to take on other sites which could hold significant numbers of waterfowl. The effort involves counting all such species at one wetland site each month on Saturday or Sunday. This should ideally happen every month but most importantly from January to March and September to December inclusive. Please contact Jim Terry (46, Manor Way, Borehamwood, Herts, WD6 1QY) or Cath Patrick (c/o LVRP, Myddleton House, Bull’s Cross, Enfield, EN2, 9HG) if you are able to help. Thank you.

Mute Swan
Canada Goose
Wigeon
Gadwall
Teal
Mallard
Shoveler
Pochard
Tufted Duck
Goldeneye
Ruddy Duck
Little Grebe
Great Crested Grebe
Cormorant
Grey Heron
Moorhen
Coot

Mute SwanTop of page

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Colne Valley:	81	67	56	65	56	31	33	39	46	59	86	66
Batchworth Lake	0	4	3	4	nc	2	2	2	7	4	7	6
Stocker's and Bury Lakes	19	20	17	16	15	15	16	21	21	35	40	23
Maple Lodge NR	0	0	2	2	2	1	0	0	0	0	0	0
Lynsters Lake	4	nc	1	1	3	2	1	2	6	4	15	10
Pynesfield North/South Lakes	8	2	1	2	1	2	3	3	5	13	22	27
Helicon Lake	1	2	0	0	2	2	2	2	2	3	2	0
Troy Mill Lake	49	39	32	40	33	7	9	9	5	0	0	0
Lea Valley:	44	52	44	42	30	22	27	25	86	97	104	104
Lea Valley:
East Hyde	3	2	7	7	2	4	2	2	2	2	2	2
Brocket Park	4	4	1	4	4	2	4	4	11	nc	9	0
Amwell GP - Ware / Thrift GP	nc	nc	nc	1	1	0	2	2	1	2	2	3
Amwell NR - others	nc	4	2	2	3	1	4	nc	6	7	5	7
Stanstead Abbotts Lakes - N lake	3	4	3	6	1	2	2	8	3	8	10	18
Rye Meads	4	5	5	nc	nc	nc	nc	nc	43	42	35	10
Broxbourne GP	3	2	1	3	3	1	nc	2	2	1	5	7
Cheshunt GPs:	27	31	25	19	16	12	13	7	18	35	36	57
Cheshunt GPs:
Herts:	12	17	7	10	5	4	5	5	12	13	25	49
Herts:
Bowyers Water	2	2	2	3	2	2	3	3	4	4	16	39
Cheshunt Lake	0	4	0	0	0	0	2	0	2	1	0	2
Northmet Lake	2	4	1	0	2	0	0	2	2	3	1	0
Slipe Lane Lake	5	5	2	2	0	2	0	0	2	2	5	3
Turnford Lakes	3	2	2	5	1	0	0	0	2	3	3	5
ex-Herts:	4	7	16	9	11	8	8	0	3	0	11	8
ex-Herts:
Friday Lake	0	0	1	0	0	0	0	0	0	0	0	0
Hooks Marsh GP	3	0	1	3	1	1	0	0	0	0	3	2
Met Police Pit	0	0	4	1	2	0	2	0	2	0	2	0
Seventy Acres Lake	1	7	10	5	8	7	6	nc	1	0	6	6
Essex:	11	7	2	0	0	0	0	2	3	22	0	0
Essex:
Hall Marsh Scrape	0	0	2	0	0	0	0	2	3	2	0	0
Holyfield Marsh Lake	11	7	nc	nc	nc	nc	nc	nc	0	20	nc	nc
Radwell Mill	16	nc	14	14	nc	11	nc	12	16	16	17	17
Panshanger Park	2	4	2	2	nc	nc	nc	nc	8	6	5	0
Fairlands Valley Park	2	2	2	2	2	4	3	3	3	nc	3	2
Verulamium Park	5	5	5	1	0	2	nc	0	2	9	7	6
Tyttenhanger GPs - all	Present	3	3	9	7	11	Present	10	8	16	12	7
Hilfield Park Reservoir	0	0	2	3	2	3	9	5	4	4	4	0
Tring Reservoirs	10	7	nc	4	13	29	38	31	32	nc	19	nc

Canada GooseTop of page

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Colne Valley:	155	128	204	143	62	100	157	55	90	47	88	224
Batchworth Lake	29	25	10	23	nc	0	10	1	8	2	2	28
Stocker's and Bury Lakes	86	72	99	83	35	92	123	6	11	5	3	96
Maple Lodge NR	0	31	0	4	4	2	7	0	0	0	0	0
Lynsters Lake	17	nc	91	28	23	2	1	11	71	23	83	88
Pynesfield North/South Lakes	0	0	0	0	0	0	0	4	0	0	0	0
Helicon Lake	22	0	2	4	0	2	14	0	0	17	0	10
Troy Mill Lake	1	0	2	1	0	2	2	33	0	0	0	2
Lea Valley:	133	243	332	299	217	440	565	206	487	333	167	195
Lea Valley:
East Hyde	6	77	155	57	44	32	48	38	77	121	59	38
Brocket Park	12	9	24	0	2	0	3	7	5	nc	27	78
Amwell GP - Ware / Thrift GP	nc	nc	nc	8	2	27	27	0	0	0	0	0
Amwell NR - others	nc	37	73	81	56	17	133	nc	267	0	2	46
Stanstead Abbotts Lakes - N lake	21	9	25	24	14	28	17	48	0	3	18	8
Rye Meads	7	0	5	nc	nc	nc	nc	nc	10	2	32	1
Broxbourne GP	0	0	7	2	2	0	nc	0	0	0	5	2
Cheshunt GPs:	87	111	43	127	97	336	337	113	128	207	24	22
Cheshunt GPs:
Herts:	6	32	32	44	33	203	209	98	4	22	0	1
Herts:
Bowyers Water	2	9	2	17	11	114	98	80	0	15	0	0
Cheshunt Lake	0	6	16	4	7	9	8	0	0	1	0	1
Northmet Lake	2	13	2	14	13	80	97	13	2	6	0	0
Slipe Lane Lake	2	0	0	3	0	0	6	5	0	0	0	0
Turnford Lakes	0	4	12	6	2	0	0	0	2	0	0	0
ex-Herts:	5	50	11	81	58	133	128	15	46	73	10	5
ex-Herts:
Friday Lake	0	0	0	1	0	45	51	0	0	0	0	0
Hooks Marsh GP	4	2	8	19	12	28	6	10	4	2	0	2
Met Police Pit	0	6	2	18	6	0	1	5	0	0	2	0
Seventy Acres Lake	1	42	1	43	40	60	70	nc	42	71	8	3
Essex:	76	29	0	2	6	0	0	0	78	112	14	16
Essex:
Hall Marsh Scrape	2	8	0	2	6	0	0	0	2	0	14	16
Holyfield Marsh Lake	74	21	nc	nc	nc	nc	nc	nc	76	112	nc	nc
Radwell Mill	3	nc	6	23	nc	7	nc	5	0	0	0	0
Panshanger Park	0	4	25	40	nc	nc	nc	nc	0	0	6	9
Fairlands Valley Park	129	175	79	86	65	220	244	46	58	nc	24	70
Verulamium Park	21	41	23	9	34	19	nc	6	55	99	25	0
Tyttenhanger GPs - all	0	37	12	21	24	53	Present	120	129	60	81	104
Hilfield Park Reservoir	0	0	0	0	2	73	103	80	0	0	13	0
Tring Reservoirs	10	59	nc	9	21	131	87	161	41	nc	2	nc

WigeonTop of page

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Colne Valley:	59	27	4	0	0	0	0	3	0	2	72	54
Batchworth Lake	0	0	0	0	nc	0	0	0	0	0	0	0
Stocker's and Bury Lakes	3	0	0	0	0	0	0	1	0	0	14	26
Maple Lodge NR	0	0	0	0	0	0	0	0	0	0	0	0
Lynsters Lake	0	nc	0	0	0	0	0	0	0	2	33	0
Pynesfield North/South Lakes	32	27	4	0	0	0	0	0	0	0	25	25
Helicon Lake	0	0	0	0	0	0	0	0	0	0	0	3
Troy Mill Lake	24	0	0	0	0	0	0	2	0	0	0	0
Lea Valley:	12	1	76	0	0	0	0	0	19	94	13	31
Lea Valley:
East Hyde	0	1	2	0	0	0	0	0	0	0	0	0
Brocket Park	0	0	0	0	0	0	0	0	0	nc	0	0
Amwell GP - Ware / Thrift GP	nc	nc	nc	0	0	0	0	0	0	0	0	0
Amwell NR - others	nc	0	70	0	0	0	0	nc	0	10	4	13
Stanstead Abbotts Lakes - N lake	0	0	0	0	0	0	0	0	0	1	0	0
Rye Meads	0	0	0	nc	nc	nc	nc	nc	11	33	1	0
Broxbourne GP	0	0	0	0	0	0	nc	0	0	0	0	0
Cheshunt GPs:	12	0	4	0	0	0	0	0	8	50	8	18
Cheshunt GPs:
Herts:	4	0	4	0	0	0	0	0	6	47	8	14
Herts:
Bowyers Water	4	0	4	0	0	0	0	0	6	47	8	14
Cheshunt Lake	0	0	0	0	0	0	0	0	0	0	0	0
Northmet Lake	0	0	0	0	0	0	0	0	0	0	0	0
Slipe Lane Lake	0	0	0	0	0	0	0	0	0	0	0	0
Turnford Lakes	0	0	0	0	0	0	0	0	0	0	0	0
ex-Herts:	0	0	0	0	0	0	0	0	0	0	0	0
ex-Herts:
Friday Lake	0	0	0	0	0	0	0	0	0	0	0	0
Hooks Marsh GP	0	0	0	0	0	0	0	0	0	0	0	0
Met Police Pit	0	0	0	0	0	0	0	0	0	0	0	0
Seventy Acres Lake	0	0	0	0	0	0	0	nc	0	0	0	0
Essex:	8	0	0	0	0	0	0	0	2	3	0	4
Essex:
Hall Marsh Scrape	0	0	0	0	0	0	0	0	0	1	0	4
Holyfield Marsh Lake	8	0	nc	nc	nc	nc	nc	nc	2	2	nc	nc
Radwell Mill	0	nc	0	0	nc	0	nc	0	0	0	0	0
Panshanger Park	31	0	Present	0	nc	nc	nc	nc	2	32	36	4
Fairlands Valley Park	0	0	0	0	0	0	0	0	0	nc	0	0
Verulamium Park	0	0	0	0	0	0	nc	0	0	0	0	0
Tyttenhanger GPs - all	0	0	0	0	0	0	0	0	7	15	5	0
Hilfield Park Reservoir	12	0	24	0	0	0	0	0	1	Present	0	2
Tring Reservoirs	86	150	nc	18	0	0	0	0	20	nc	148	nc

GadwallTop of page

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Colne Valley:	87	23	18	12	14	31	57	64	21	37	99	91
Batchworth Lake	0	0	0	0	nc	0	0	0	0	0	0	0
Stocker's and Bury Lakes	9	4	1	8	5	2	26	31	8	25	44	66
Maple Lodge NR	2	0	2	4	5	29	31	6	8	0	0	0
Lynsters Lake	7	nc	2	0	0	0	0	1	0	0	6	6
Pynesfield North/South Lakes	32	13	10	0	0	0	0	24	5	10	49	17
Helicon Lake	2	2	2	0	0	0	0	0	0	0	0	1
Troy Mill Lake	35	4	1	0	4	0	0	2	0	2	0	1
Lea Valley:	223	272	317	50	28	21	111	112	505	518	334	400
Lea Valley:
East Hyde	14	12	14	8	2	0	0	0	2	4	10	12
Brocket Park	4	0	19	4	0	0	0	0	0	nc	0	0
Amwell GP - Ware / Thrift GP	nc	nc	nc	2	4	5	28	10	2	0	4	2
Amwell NR - others	nc	7	2	5	9	12	32	nc	23	41	67	126
Stanstead Abbotts Lakes - N lake	15	34	23	4	6	2	21	81	85	52	97	58
Rye Meads	117	158	176	nc	nc	nc	nc	nc	327	343	118	79
Broxbourne GP	11	11	3	0	4	0	nc	0	0	4	0	11
Cheshunt GPs:	62	50	80	27	3	2	30	21	66	74	38	112
Cheshunt GPs:
Herts:	28	23	9	3	0	0	2	14	9	47	29	106
Herts:
Bowyers Water	22	18	2	3	0	0	0	3	0	40	13	65
Cheshunt Lake	0	2	0	0	0	0	0	0	0	0	0	0
Northmet Lake	4	0	0	0	0	0	2	5	2	0	0	1
Slipe Lane Lake	0	0	0	0	0	0	0	0	4	1	1	9
Turnford Lakes	2	3	7	0	0	0	0	6	3	6	15	31
ex-Herts:	14	23	71	22	3	2	28	7	41	14	9	4
ex-Herts:
Friday Lake	2	0	2	0	0	0	0	0	0	0	0	0
Hooks Marsh GP	10	8	15	10	3	2	8	4	9	2	6	2
Met Police Pit	0	0	0	0	0	0	0	3	23	7	0	2
Seventy Acres Lake	2	15	54	12	0	0	20	nc	9	5	3	0
Essex:	20	4	0	2	0	0	0	0	16	13	0	2
Essex:
Hall Marsh Scrape	0	0	0	2	0	0	0	0	0	2	0	2
Holyfield Marsh Lake	20	4	nc	nc	nc	nc	nc	nc	16	11	nc	nc
Radwell Mill	0	nc	0	3	nc	0	nc	0	0	1	11	0
Panshanger Park	179	92	40	23	nc	nc	nc	nc	14	40	102	183
Fairlands Valley Park	0	0	0	0	0	0	0	0	0	nc	0	0
Verulamium Park	9	2	4	2	1	0	nc	0	4	53	0	0
Tyttenhanger GPs - all	Present	39	50	29	3	12	Present	40	100	110	80	63
Hilfield Park Reservoir	13	26	0	8	4	4	76	18	4	17	47	34
Tring Reservoirs	35	42	nc	15	13	60	127	42	55	nc	49	nc

TealTop of page

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Colne Valley:	0	13	13	2	2	0	20	33	79	54	67	29
Batchworth Lake	0	0	0	0	nc	0	0	0	0	0	0	0
Stocker's and Bury Lakes	0	0	8	0	0	0	0	0	0	0	0	0
Maple Lodge NR	0	11	1	2	2	0	20	33	79	54	67	25
Lynsters Lake	0	nc	0	0	0	0	0	0	0	0	0	0
Pynesfield North/South Lakes	0	0	0	0	0	0	0	0	0	0	0	4
Helicon Lake	0	0	0	0	0	0	0	0	0	0	0	0
Troy Mill Lake	0	2	4	0	0	0	0	0	0	0	0	0
Lea Valley:	128	79	106	11	0	0	0	0	86	167	81	74
Lea Valley:
East Hyde	2	0	2	1	0	0	0	0	0	0	0	2
Brocket Park	0	0	0	0	0	0	0	0	0	nc	0	0
Amwell GP - Ware / Thrift GP	nc	nc	nc	0	0	0	0	0	0	0	1	11
Amwell NR - others	nc	7	3	4	0	0	0	nc	1	6	2	6
Stanstead Abbotts Lakes - N lake	4	2	1	0	0	0	0	0	0	0	3	2
Rye Meads	117	57	95	nc	nc	nc	nc	nc	79	153	59	49
Broxbourne GP	0	0	0	0	0	0	nc	0	0	0	2	2
Cheshunt GPs:	5	13	5	6	0	0	0	0	6	8	14	2
Cheshunt GPs:
Herts:	0	2	1	0	0	0	0	0	0	1	2	0
Herts:
Bowyers Water	0	0	1	0	0	0	0	0	0	0	0	0
Cheshunt Lake	0	0	0	0	0	0	0	0	0	0	0	0
Northmet Lake	0	0	0	0	0	0	0	0	0	0	0	0
Slipe Lane Lake	0	0	0	0	0	0	0	0	0	1	1	0
Turnford Lakes	0	2	0	0	0	0	0	0	0	0	1	0
ex-Herts:	1	0	3	0	0	0	0	0	0	4	12	2
ex-Herts:
Friday Lake	0	0	0	0	0	0	0	0	0	0	0	0
Hooks Marsh GP	1	0	0	0	0	0	0	0	0	2	12	2
Met Police Pit	0	0	0	0	0	0	0	0	0	0	0	0
Seventy Acres Lake	0	0	3	0	0	0	0	nc	0	2	0	0
Essex:	4	11	1	6	0	0	0	0	6	3	0	0
Essex:
Hall Marsh Scrape	2	7	1	6	0	0	0	0	0	3	0	0
Holyfield Marsh Lake	2	4	nc	nc	nc	nc	nc	nc	6	0	nc	nc
Radwell Mill	0	nc	0	0	nc	0	nc	0	0	0	0	0
Panshanger Park	82	0	25	1	nc	nc	nc	nc	0	14	11	101
Fairlands Valley Park	0	0	0	0	0	0	0	0	0	nc	0	0
Verulamium Park	0	0	0	0	0	0	nc	0	0	0	0	0
Tyttenhanger GPs - all	Present	45	30	22	0	5	0	5	26	60	80	56
Hilfield Park Reservoir	0	2	3	2	0	0	0	0	3	4	4	0
Tring Reservoirs	419	198	nc	13	0	0	10	64	194	nc	375	nc

MallardTop of page

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Colne Valley:	139	129	103	97	48	86	113	129	110	107	113	157
Batchworth Lake	20	10	4	15	nc	23	22	20	15	27	15	36
Stocker's and Bury Lakes	45	64	54	47	23	34	30	25	31	43	30	41
Maple Lodge NR	27	42	9	11	9	17	48	49	41	7	31	42
Lynsters Lake	21	nc	18	10	8	9	6	0	0	3	16	5
Pynesfield North/South Lakes	10	1	8	3	1	0	3	25	7	19	12	7
Helicon Lake	9	7	3	6	2	2	1	1	16	5	2	19
Troy Mill Lake	7	5	7	5	5	1	3	9	0	3	7	7
Lea Valley:	364	368	308	187	115	176	211	99	266	271	295	383
Lea Valley:
East Hyde	31	22	17	48	8	10	10	20	18	29	19	17
Brocket Park	4	6	7	9	0	10	26	9	0	nc	12	4
Amwell GP - Ware / Thrift GP	nc	nc	nc	3	6	7	15	4	1	13	18	22
Amwell NR - others	nc	29	20	16	14	31	31	nc	13	14	21	43
Stanstead Abbotts Lakes - N lake	17	9	9	10	15	15	33	26	9	3	33	39
Rye Meads	93	70	126	nc	nc	nc	nc	nc	88	52	71	65
Broxbourne GP	19	12	17	10	13	14	nc	2	5	4	7	6
Cheshunt GPs:	200	220	112	91	59	89	96	38	132	156	114	187
Cheshunt GPs:
Herts:	99	82	55	42	24	48	21	27	53	84	37	87
Herts:
Bowyers Water	16	21	4	3	14	13	8	12	4	25	16	3
Cheshunt Lake	8	7	2	4	3	15	1	3	2	2	6	15
Northmet Lake	65	46	43	22	4	17	9	11	42	41	9	60
Slipe Lane Lake	0	4	4	1	2	2	1	0	2	6	1	1
Turnford Lakes	10	4	2	12	1	1	2	1	3	10	5	8
ex-Herts:	80	98	55	47	32	41	68	8	48	59	77	96
ex-Herts:
Friday Lake	8	7	0	0	3	0	0	0	0	0	0	0
Hooks Marsh GP	7	20	6	11	5	4	14	8	4	6	15	12
Met Police Pit	2	7	4	2	0	5	1	0	2	4	7	2
Seventy Acres Lake	63	64	45	34	24	32	53	nc	42	49	55	82
Essex:	21	40	2	2	3	0	7	3	31	13	0	4
Essex:
Hall Marsh Scrape	5	6	2	2	3	0	7	3	3	1	0	4
Holyfield Marsh Lake	16	34	nc	nc	nc	nc	nc	nc	28	12	nc	nc
Radwell Mill	31	nc	29	22	nc	26	nc	64	42	56	50	57
Panshanger Park	66	29	36	43	nc	nc	nc	nc	17	44	24	7
Fairlands Valley Park	179	107	109	65	73	99	157	236	217	nc	207	202
Verulamium Park	8	3	12	11	6	15	nc	17	4	9	2	0
Tyttenhanger GPs - all	Present	9	7	9	21	20	Present	36	45	62	63	56
Hilfield Park Reservoir	3	4	5	10	12	16	8	6	8	15	9	11
Tring Reservoirs	142	133	nc	78	79	205	305	262	236	nc	119	nc

ShovelerTop of page

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Colne Valley:	70	29	12	13	0	0	12	0	12	50	48	21
Batchworth Lake	0	3	7	0	nc	0	0	0	0	0	0	0
Stocker's and Bury Lakes	55	12	1	12	0	0	1	0	0	50	1	14
Maple Lodge NR	4	10	4	0	0	0	11	Present	12	0	7	0
Lynsters Lake	8	nc	0	0	0	0	0	0	0	0	8	3
Pynesfield North/South Lakes	0	0	0	0	0	0	0	0	0	0	14	4
Helicon Lake	0	4	0	0	0	0	0	0	0	0	0	0
Troy Mill Lake	3	0	0	1	0	0	0	0	0	0	18	0
Lea Valley:	236	138	127	14	1	9	2	0	159	135	131	313
Lea Valley:
East Hyde	0	0	0	0	0	0	0	0	0	0	0	0
Brocket Park	0	0	2	0	0	0	0	0	0	nc	0	0
Amwell GP - Ware / Thrift GP	nc	nc	nc	1	0	0	0	0	0	4	2	26
Amwell NR - others	nc	16	6	5	1	1	2	nc	10	8	26	15
Stanstead Abbotts Lakes - N lake	12	7	5	0	0	0	0	0	2	13	11	8
Rye Meads	50	35	55	nc	nc	nc	nc	nc	78	85	44	164
Broxbourne GP	2	2	0	0	0	0	nc	0	0	1	4	0
Cheshunt GPs:	172	78	59	8	0	8	0	0	69	24	44	100
Cheshunt GPs:
Herts:	27	22	19	3	0	0	0	0	14	11	8	40
Herts:
Bowyers Water	1	4	17	0	0	0	0	0	10	4	0	1
Cheshunt Lake	0	0	0	0	0	0	0	0	0	0	0	0
Northmet Lake	0	12	0	0	0	0	0	0	1	4	0	6
Slipe Lane Lake	26	2	0	0	0	0	0	0	3	2	0	0
Turnford Lakes	0	4	2	3	0	0	0	0	0	1	8	33
ex-Herts:	114	38	28	2	0	8	0	0	24	13	36	58
ex-Herts:
Friday Lake	5	0	0	0	0	0	0	0	0	0	0	17
Hooks Marsh GP	54	26	10	2	0	0	0	0	0	0	6	11
Met Police Pit	54	0	2	0	0	0	0	0	0	0	0	17
Seventy Acres Lake	1	12	16	0	0	8	0	nc	24	13	30	13
Essex:	31	18	12	3	0	0	0	0	31	0	0	2
Essex:
Hall Marsh Scrape	13	14	12	3	0	0	0	0	0	0	0	2
Holyfield Marsh Lake	18	4	nc	nc	nc	nc	nc	nc	31	0	nc	nc
Radwell Mill	2	nc	0	0	nc	0	nc	0	0	3	1	1
Panshanger Park	17	8	6	0	nc	nc	nc	nc	1	0	4	Present
Fairlands Valley Park	0	0	0	0	0	0	0	0	1	nc	0	0
Verulamium Park	9	2	16	0	0	0	nc	0	0	4	2	2
Tyttenhanger GPs - all	Present	44	35	16	0	0	0	1	16	12	25	16
Hilfield Park Reservoir	90	77	92	22	0	0	0	0	13	57	45	11
Tring Reservoirs	78	67	nc	3	0	0	5	12	132	nc	75	nc

PochardTop of page

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Colne Valley:	46	59	28	34	21	13	16	20	6	73	82	183
Batchworth Lake	4	4	5	0	nc	0	0	0	0	0	0	0
Stocker's and Bury Lakes	20	21	3	19	12	5	4	13	4	62	34	130
Maple Lodge NR	0	16	3	8	7	7	5	3	2	0	0	0
Lynsters Lake	5	nc	5	1	0	0	7	4	0	1	1	0
Pynesfield North/South Lakes	3	13	0	0	0	0	0	0	0	0	7	18
Helicon Lake	2	1	2	0	0	0	0	0	0	0	0	0
Troy Mill Lake	12	4	10	6	2	1	0	0	0	10	40	35
Lea Valley:	55	57	77	26	27	7	23	4	66	87	88	163
Lea Valley:
East Hyde	0	0	0	0	0	0	0	0	0	0	0	0
Brocket Park	0	0	0	0	0	0	0	0	0	nc	0	0
Amwell GP - Ware / Thrift GP	nc	nc	nc	0	6	2	0	4	0	26	20	24
Amwell NR - others	nc	10	6	8	4	1	11	nc	13	12	14	26
Stanstead Abbotts Lakes - N lake	2	3	14	8	10	4	1	0	34	41	21	31
Rye Meads	11	12	32	nc	nc	nc	nc	nc	2	1	0	1
Broxbourne GP	3	1	3	2	0	0	nc	0	0	0	21	60
Cheshunt GPs:	39	31	22	8	7	0	11	0	17	7	12	21
Cheshunt GPs:
Herts:	8	9	8	0	1	0	0	0	0	0	4	21
Herts:
Bowyers Water	8	9	7	0	0	0	0	0	0	0	4	19
Cheshunt Lake	0	0	0	0	0	0	0	0	0	0	0	2
Northmet Lake	0	0	0	0	1	0	0	0	0	0	0	0
Slipe Lane Lake	0	0	1	0	0	0	0	0	0	0	0	0
Turnford Lakes	0	0	0	0	0	0	0	0	0	0	0	0
ex-Herts:	7	6	14	8	6	0	11	0	0	0	8	0
ex-Herts:
Friday Lake	4	3	10	0	0	0	0	0	0	0	0	0
Hooks Marsh GP	1	0	0	0	0	0	0	0	0	0	0	0
Met Police Pit	1	0	0	0	0	0	0	0	0	0	0	0
Seventy Acres Lake	1	3	4	8	6	0	11	nc	0	0	8	0
Essex:	24	16	0	0	0	0	0	0	17	7	0	0
Essex:
Hall Marsh Scrape	0	0	0	0	0	0	0	0	0	0	0	0
Holyfield Marsh Lake	24	16	nc	nc	nc	nc	nc	nc	17	7	nc	nc
Radwell Mill	0	nc	0	0	nc	0	nc	0	0	0	0	0
Panshanger Park	4	4	6	2	nc	nc	nc	nc	17	25	16	12
Fairlands Valley Park	0	1	0	0	0	0	0	0	0	nc	0	0
Verulamium Park	3	10	8	4	0	0	nc	0	0	0	2	4
Tyttenhanger GPs - all	Present	1	7	0	0	0	0	11	15	5	2	3
Hilfield Park Reservoir	9	5	0	0	0	24	117	27	12	17	5	21
Tring Reservoirs	120	81	nc	5	4	5	11	16	119	nc	145	nc

Tufted DuckTop of page

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Colne Valley:	221	221	230	163	62	158	67	122	46	167	343	301
Batchworth Lake	11	22	12	25	nc	3	2	1	1	6	15	26
Stocker's and Bury Lakes	69	89	71	60	40	79	28	94	21	83	168	130
Maple Lodge NR	4	10	9	13	14	14	10	5	2	0	1	1
Lynsters Lake	32	nc	58	28	2	7	17	19	6	13	37	38
Pynesfield North/South Lakes	47	22	19	4	2	18	4	0	10	27	27	38
Helicon Lake	17	28	14	12	2	7	0	3	6	14	17	12
Troy Mill Lake	41	50	47	21	2	30	6	0	0	24	78	56
Lea Valley:	384	632	535	319	144	152	128	231	397	311	305	436
Lea Valley:
East Hyde	0	0	0	0	2	2	1	0	2	0	0	0
Brocket Park	9	13	16	13	10	16	11	2	0	nc	4	3
Amwell GP - Ware / Thrift GP	nc	nc	nc	63	7	32	24	41	28	61	30	45
Amwell NR - others	nc	97	36	33	37	21	17	nc	28	36	83	70
Stanstead Abbotts Lakes - N lake	24	53	85	44	22	22	43	72	83	70	109	125
Rye Meads	38	55	73	nc	nc	nc	nc	nc	45	6	7	27
Broxbourne GP	73	95	115	47	11	9	nc	98	53	21	13	50
Cheshunt GPs:	240	319	210	119	55	50	32	18	158	117	59	116
Cheshunt GPs:
Herts:	82	157	113	59	27	19	11	8	89	81	42	81
Herts:
Bowyers Water	24	48	52	42	18	16	0	5	51	25	7	14
Cheshunt Lake	8	14	11	0	0	0	0	0	0	0	5	7
Northmet Lake	24	45	26	14	9	3	11	3	36	53	5	6
Slipe Lane Lake	22	22	8	3	0	0	0	0	0	0	8	5
Turnford Lakes	4	28	16	0	0	0	0	0	2	3	17	49
ex-Herts:	90	113	94	60	28	31	21	10	13	14	17	33
ex-Herts:
Friday Lake	44	30	28	27	1	1	0	9	9	14	4	5
Hooks Marsh GP	11	49	33	8	2	6	0	1	0	0	0	4
Met Police Pit	1	1	0	0	2	0	1	0	0	0	0	3
Seventy Acres Lake	34	33	33	25	23	24	20	nc	4	0	13	21
Essex:	68	49	3	0	0	0	0	0	56	22	0	2
Essex:
Hall Marsh Scrape	0	1	3	0	0	0	0	0	0	0	0	2
Holyfield Marsh Lake	68	48	nc	nc	nc	nc	nc	nc	56	22	nc	nc
Radwell Mill	0	nc	0	2	nc	2	nc	1	0	0	0	0
Panshanger Park	40	65	36	36	nc	nc	nc	nc	55	25	31	56
Fairlands Valley Park	0	0	1	0	0	0	0	0	0	nc	0	0
Verulamium Park	1	6	8	18	7	4	nc	0	0	0	0	1
Tyttenhanger GPs - all	Present	42	30	15	7	7	Present	12	4	14	17	31
Hilfield Park Reservoir	69	94	58	74	5	28	122	184	230	80	69	76
Tring Reservoirs	204	231	nc	0	69	91	180	212	257	nc	188	nc

GoldeneyeTop of page

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Colne Valley:	3	15	5	0	0	0	0	1	0	2	2	8
Batchworth Lake	0	0	0	0	nc	0	0	0	0	0	0	0
Stocker's and Bury Lakes	2	15	5	0	0	0	0	0	0	0	2	8
Maple Lodge NR	0	0	0	0	0	0	0	0	0	0	0	0
Lynsters Lake	0	nc	0	0	0	0	0	0	0	0	0	0
Pynesfield North/South Lakes	0	0	0	0	0	0	0	0	0	2	0	0
Helicon Lake	0	0	0	0	0	0	0	1	0	0	0	0
Troy Mill Lake	1	0	0	0	0	0	0	0	0	0	0	0
Lea Valley:	3	10	6	2	0	0	0	0	0	0	0	5
Lea Valley:
East Hyde	0	0	0	0	0	0	0	0	0	0	0	0
Brocket Park	0	0	0	0	0	0	0	0	0	nc	0	0
Amwell GP - Ware / Thrift GP	nc	nc	nc	0	0	0	0	0	0	0	0	0
Amwell NR - others	nc	6	6	2	0	0	0	nc	0	0	0	5
Stanstead Abbotts Lakes - N lake	0	2	0	0	0	0	0	0	0	0	0	0
Rye Meads	0	0	0	nc	nc	nc	nc	nc	0	0	0	0
Broxbourne GP	0	0	0	0	0	0	nc	0	0	0	0	0
Cheshunt GPs:	3	2	0	0	0	0	0	0	0	0	0	0
Cheshunt GPs:
Herts:	1	0	0	0	0	0	0	0	0	0	0	0
Herts:
Bowyers Water	0	0	0	0	0	0	0	0	0	0	0	0
Cheshunt Lake	0	0	0	0	0	0	0	0	0	0	0	0
Northmet Lake	1	0	0	0	0	0	0	0	0	0	0	0
Slipe Lane Lake	0	0	0	0	0	0	0	0	0	0	0	0
Turnford Lakes	0	0	0	0	0	0	0	0	0	0	0	0
ex-Herts:	0	0	0	0	0	0	0	0	0	0	0	0
ex-Herts:
Friday Lake	0	0	0	0	0	0	0	0	0	0	0	0
Hooks Marsh GP	0	0	0	0	0	0	0	0	0	0	0	0
Met Police Pit	0	0	0	0	0	0	0	0	0	0	0	0
Seventy Acres Lake	0	0	0	0	0	0	0	nc	0	0	0	0
Essex:	2	2	0	0	0	0	0	0	0	0	0	0
Essex:
Hall Marsh Scrape	0	0	0	0	0	0	0	0	0	0	0	0
Holyfield Marsh Lake	2	2	nc	nc	nc	nc	nc	nc	0	0	nc	nc
Radwell Mill	0	nc	0	0	nc	0	nc	0	0	0	0	0
Panshanger Park	0	0	0	0	nc	nc	nc	nc	0	0	0	0
Fairlands Valley Park	0	0	0	0	0	0	0	0	0	nc	0	0
Verulamium Park	0	0	0	0	0	0	nc	0	0	0	0	0
Tyttenhanger GPs - all	0	0	0	0	0	0	0	0	0	0	0	0
Hilfield Park Reservoir	0	1	1	0	0	0	0	0	0	0	1	1
Tring Reservoirs	4	2	nc	1	0	0	0	0	0	nc	7	nc

Ruddy DuckTop of page

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Colne Valley:	0	0	0	0	0	0	0	0	0	0	0	0
Batchworth Lake	0	0	0	0	nc	0	0	0	0	0	0	0
Stocker's and Bury Lakes	0	0	0	0	0	0	0	0	0	0	0	0
Maple Lodge NR	0	0	0	0	0	0	0	0	0	0	0	0
Lynsters Lake	0	nc	0	0	0	0	0	0	0	0	0	0
Pynesfield North/South Lakes	0	0	0	0	0	0	0	0	0	0	0	0
Helicon Lake	0	0	0	0	0	0	0	0	0	0	0	0
Troy Mill Lake	0	0	0	0	0	0	0	0	0	0	0	0
Lea Valley:	0	0	0	0	0	0	0	0	0	0	0	0
Lea Valley:
East Hyde	0	0	0	0	0	0	0	0	0	0	0	0
Brocket Park	0	0	0	0	0	0	0	0	0	nc	0	0
Amwell GP - Ware / Thrift GP	nc	nc	nc	0	0	0	0	0	0	0	0	0
Amwell NR - others	nc	0	0	0	0	0	0	nc	0	0	0	0
Stanstead Abbotts Lakes - N lake	0	0	0	0	0	0	0	0	0	0	0	0
Rye Meads	0	0	0	nc	nc	nc	nc	nc	0	0	0	0
Broxbourne GP	0	0	0	0	0	0	nc	0	0	0	0	0
Cheshunt GPs:	0	0	0	0	0	0	0	0	0	0	0	0
Cheshunt GPs:
Herts:	0	0	0	0	0	0	0	0	0	0	0	0
Herts:
Bowyers Water	0	0	0	0	0	0	0	0	0	0	0	0
Cheshunt Lake	0	0	0	0	0	0	0	0	0	0	0	0
Northmet Lake	0	0	0	0	0	0	0	0	0	0	0	0
Slipe Lane Lake	0	0	0	0	0	0	0	0	0	0	0	0
Turnford Lakes	0	0	0	0	0	0	0	0	0	0	0	0
ex-Herts:	0	0	0	0	0	0	0	0	0	0	0	0
ex-Herts:
Friday Lake	0	0	0	0	0	0	0	0	0	0	0	0
Hooks Marsh GP	0	0	0	0	0	0	0	0	0	0	0	0
Met Police Pit	0	0	0	0	0	0	0	0	0	0	0	0
Seventy Acres Lake	0	0	0	0	0	0	0	nc	0	0	0	0
Essex:	0	0	0	0	0	0	0	0	0	0	0	0
Essex:
Hall Marsh Scrape	0	0	0	0	0	0	0	0	0	0	0	0
Holyfield Marsh Lake	0	0	nc	nc	nc	nc	nc	nc	0	0	nc	nc
Radwell Mill	0	nc	0	0	nc	0	nc	0	0	0	0	0
Panshanger Park	0	0	0	0	nc	nc	nc	nc	0	0	0	0
Fairlands Valley Park	0	0	0	0	0	0	0	0	0	nc	0	0
Verulamium Park	0	0	0	0	0	0	nc	0	0	0	0	0
Tyttenhanger GPs - all	0	0	0	0	0	0	0	0	0	0	0	0
Hilfield Park Reservoir	0	0	0	0	0	0	0	0	0	0	0	0
Tring Reservoirs	0	0	nc	0	0	0	0	0	0	nc	0	nc

Little GrebeTop of page

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Colne Valley:	2	4	7	10	7	8	8	9	8	6	2	0
Batchworth Lake	0	0	0	0	nc	0	0	0	0	0	0	0
Stocker's and Bury Lakes	0	0	1	0	0	0	0	0	0	1	0	0
Maple Lodge NR	2	4	6	10	7	8	8	9	8	5	2	0
Lynsters Lake	0	nc	0	0	0	0	0	0	0	0	0	0
Pynesfield North/South Lakes	0	0	0	0	0	0	0	0	0	0	0	0
Helicon Lake	0	0	0	0	0	0	0	0	0	0	0	0
Troy Mill Lake	0	0	0	0	0	0	0	0	0	0	0	0
Lea Valley:	22	24	6	3	3	6	11	11	54	26	22	10
Lea Valley:
East Hyde	1	2	1	2	2	2	2	2	2	0	2	0
Brocket Park	7	7	3	1	1	4	9	9	9	nc	3	3
Amwell GP - Ware / Thrift GP	nc	nc	nc	0	0	0	0	0	0	0	0	0
Amwell NR - others	nc	0	0	0	0	0	0	nc	1	0	1	1
Stanstead Abbotts Lakes - N lake	0	0	0	0	0	0	0	0	0	0	1	0
Rye Meads	3	9	0	nc	nc	nc	nc	nc	38	16	7	4
Broxbourne GP	1	3	1	0	0	0	nc	0	0	2	4	0
Cheshunt GPs:	10	3	1	0	0	0	0	0	4	8	4	2
Cheshunt GPs:
Herts:	0	1	0	0	0	0	0	0	0	0	0	1
Herts:
Bowyers Water	0	0	0	0	0	0	0	0	0	0	0	1
Cheshunt Lake	0	0	0	0	0	0	0	0	0	0	0	0
Northmet Lake	0	1	0	0	0	0	0	0	0	0	0	0
Slipe Lane Lake	0	0	0	0	0	0	0	0	0	0	0	0
Turnford Lakes	0	0	0	0	0	0	0	0	0	0	0	0
ex-Herts:	3	0	0	0	0	0	0	0	2	2	4	1
ex-Herts:
Friday Lake	0	0	0	0	0	0	0	0	0	0	0	0
Hooks Marsh GP	0	0	0	0	0	0	0	0	0	0	0	1
Met Police Pit	0	0	0	0	0	0	0	0	0	1	0	0
Seventy Acres Lake	3	0	0	0	0	0	0	nc	2	1	4	0
Essex:	7	2	1	0	0	0	0	0	2	6	0	0
Essex:
Hall Marsh Scrape	0	0	1	0	0	0	0	0	0	0	0	0
Holyfield Marsh Lake	7	2	nc	nc	nc	nc	nc	nc	2	6	nc	nc
Radwell Mill	0	nc	0	0	nc	0	nc	0	0	1	5	4
Panshanger Park	23	14	12	12	nc	nc	nc	nc	36	24	31	30
Fairlands Valley Park	0	0	0	0	0	0	0	0	0	nc	0	0
Verulamium Park	0	0	1	0	0	0	nc	1	5	2	0	0
Tyttenhanger GPs - all	0	0	0	1	0	0	0	1	2	1	0	1
Hilfield Park Reservoir	1	10	5	1	4	1	1	8	5	5	7	5
Tring Reservoirs	13	15	nc	2	0	1	5	2	7	nc	15	nc

Great Crested GrebeTop of page

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Colne Valley:	38	49	41	41	30	43	42	54	51	49	43	42
Batchworth Lake	5	10	6	8	nc	4	3	3	4	8	8	10
Stocker's and Bury Lakes	17	24	16	16	9	15	12	22	19	21	15	13
Maple Lodge NR	0	0	0	0	2	1	2	0	0	0	0	0
Lynsters Lake	6	nc	7	3	6	3	7	4	3	6	7	4
Pynesfield North/South Lakes	2	6	6	4	4	8	6	8	12	10	10	7
Helicon Lake	3	2	1	2	2	1	2	4	7	1	2	1
Troy Mill Lake	5	7	5	8	7	11	10	13	6	3	1	7
Lea Valley:	59	59	53	62	53	52	52	58	110	103	74	64
Lea Valley:
East Hyde	0	0	0	0	0	0	0	0	0	0	0	0
Brocket Park	0	0	1	2	2	1	1	5	2	nc	1	1
Amwell GP - Ware / Thrift GP	nc	nc	nc	5	5	5	3	8	5	7	5	9
Amwell NR - others	nc	3	3	11	7	4	4	nc	6	9	13	12
Stanstead Abbotts Lakes - N lake	2	2	6	6	9	3	7	4	10	11	6	8
Rye Meads	0	0	0	nc	nc	nc	nc	nc	8	3	0	0
Broxbourne GP	4	6	9	10	16	17	nc	15	16	9	14	6
Cheshunt GPs:	53	48	34	28	14	22	37	26	63	64	35	28
Cheshunt GPs:
Herts:	8	8	9	10	7	10	15	17	21	23	15	12
Herts:
Bowyers Water	4	3	5	4	4	6	6	6	12	13	7	5
Cheshunt Lake	0	2	0	0	0	0	0	2	0	0	1	1
Northmet Lake	3	2	4	4	3	1	5	5	6	7	4	5
Slipe Lane Lake	0	0	0	2	0	1	2	1	0	2	3	0
Turnford Lakes	1	1	0	0	0	2	2	3	3	1	0	1
ex-Herts:	20	23	25	18	7	12	22	9	21	20	20	16
ex-Herts:
Friday Lake	0	1	0	1	1	0	0	2	5	2	2	3
Hooks Marsh GP	4	11	7	4	2	9	10	6	0	5	5	8
Met Police Pit	1	0	0	1	1	0	0	1	0	1	0	0
Seventy Acres Lake	15	11	18	12	3	3	12	nc	16	12	13	5
Essex:	25	17	0	0	0	0	0	0	21	21	0	0
Essex:
Hall Marsh Scrape	0	0	0	0	0	0	0	0	0	0	0	0
Holyfield Marsh Lake	25	17	nc	nc	nc	nc	nc	nc	21	21	nc	nc
Radwell Mill	0	nc	0	0	nc	0	nc	0	0	0	0	0
Panshanger Park	0	8	2	3	nc	nc	nc	nc	2	Present	0	0
Fairlands Valley Park	3	2	3	1	2	1	0	0	0	nc	1	1
Verulamium Park	4	3	2	1	0	0	nc	0	0	0	0	0
Tyttenhanger GPs - all	Present	14	8	4	9	6	Present	4	5	11	18	21
Hilfield Park Reservoir	4	2	4	19	25	29	33	48	49	50	28	27
Tring Reservoirs	15	14	nc	24	32	33	26	29	26	nc	52	nc

CormorantTop of page

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Colne Valley:	41	39	24	7	10	3	5	25	13	30	54	58
Batchworth Lake	6	4	2	0	nc	0	0	0	0	2	2	13
Stocker's and Bury Lakes	13	22	16	6	6	2	2	9	10	22	29	18
Maple Lodge NR	0	1	0	0	2	1	2	2	1	0	0	0
Lynsters Lake	2	nc	3	0	1	0	1	0	2	1	3	0
Pynesfield North/South Lakes	3	6	0	1	0	0	0	0	0	2	16	17
Helicon Lake	1	2	2	0	0	0	0	0	0	0	3	6
Troy Mill Lake	16	4	1	0	1	0	0	14	0	3	1	4
Lea Valley:	146	150	88	67	57	54	17	26	115	156	174	155
Lea Valley:
East Hyde	5	1	2	3	2	0	1	1	3	0	2	1
Brocket Park	5	3	2	0	1	1	2	5	4	nc	0	0
Amwell GP - Ware / Thrift GP	nc	nc	nc	1	0	1	0	0	0	5	0	2
Amwell NR - others	nc	45	44	42	41	37	0	nc	14	56	28	41
Stanstead Abbotts Lakes - N lake	3	3	0	3	0	3	0	1	8	6	9	14
Rye Meads	2	0	0	nc	nc	nc	nc	nc	24	12	11	2
Broxbourne GP	8	6	5	6	7	4	nc	3	4	5	23	11
Cheshunt GPs:	123	92	35	12	6	8	14	16	58	72	101	84
Cheshunt GPs:
Herts:	25	13	10	6	3	5	4	5	12	17	54	34
Herts:
Bowyers Water	3	1	4	0	0	0	1	1	8	10	3	3
Cheshunt Lake	2	2	0	4	0	0	0	0	0	1	9	6
Northmet Lake	15	3	2	0	0	4	2	2	4	2	39	20
Slipe Lane Lake	2	1	1	1	2	0	0	0	0	3	1	4
Turnford Lakes	3	6	3	1	1	1	1	2	0	1	2	1
ex-Herts:	38	35	24	6	3	2	10	11	14	35	47	50
ex-Herts:
Friday Lake	0	0	0	0	0	0	0	0	1	0	0	1
Hooks Marsh GP	14	15	12	1	0	1	3	11	1	3	15	24
Met Police Pit	0	7	0	1	0	0	0	0	0	0	0	0
Seventy Acres Lake	24	13	12	4	3	1	7	nc	12	32	32	25
Essex:	60	44	1	0	0	1	0	0	32	20	0	0
Essex:
Hall Marsh Scrape	0	0	1	0	0	1	0	0	0	0	0	0
Holyfield Marsh Lake	60	44	nc	nc	nc	nc	nc	nc	32	20	nc	nc
Radwell Mill	0	nc	0	0	nc	0	nc	1	0	0	0	0
Panshanger Park	4	4	0	1	nc	nc	nc	nc	3	0	10	Present
Fairlands Valley Park	6	4	1	1	1	2	4	3	5	nc	6	5
Verulamium Park	0	0	0	0	0	0	nc	0	0	0	0	0
Tyttenhanger GPs - all	Present	14	3	1	1	3	0	0	1	2	11	9
Hilfield Park Reservoir	8	1	0	1	0	3	1	4	3	22	57	46
Tring Reservoirs	30	24	nc	19	24	10	19	32	98	nc	111	nc

Grey HeronTop of page

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Colne Valley:	21	20	13	19	10	24	12	13	14	14	12	19
Batchworth Lake	2	2	1	1	nc	1	2	1	2	0	2	2
Stocker's and Bury Lakes	13	14	10	17	9	18	2	4	4	3	3	6
Maple Lodge NR	1	1	0	1	1	4	2	5	2	4	3	1
Lynsters Lake	1	nc	1	0	0	0	3	0	0	0	1	3
Pynesfield North/South Lakes	2	2	0	0	0	0	3	1	0	4	1	3
Helicon Lake	0	0	0	0	0	0	0	0	0	0	0	1
Troy Mill Lake	2	1	1	0	0	1	0	2	6	3	2	3
Lea Valley:	23	39	27	22	16	21	21	13	24	18	28	33
Lea Valley:
East Hyde	3	2	2	1	1	1	2	1	1	0	1	1
Brocket Park	3	1	0	1	1	0	0	1	0	nc	0	1
Amwell GP - Ware / Thrift GP	nc	nc	nc	0	0	0	0	0	0	1	0	0
Amwell NR - others	nc	15	12	13	9	11	5	nc	0	1	4	8
Stanstead Abbotts Lakes - N lake	1	0	0	0	0	1	1	3	4	2	2	3
Rye Meads	3	4	2	nc	nc	nc	nc	nc	5	4	4	6
Broxbourne GP	1	3	1	0	0	0	nc	0	0	1	2	0
Cheshunt GPs:	12	14	10	7	5	8	13	8	14	9	15	14
Cheshunt GPs:
Herts:	1	1	1	3	2	2	3	6	6	4	7	2
Herts:
Bowyers Water	0	1	1	1	1	1	2	2	1	3	0	1
Cheshunt Lake	1	0	0	0	0	0	0	0	0	0	1	1
Northmet Lake	0	0	0	0	0	0	1	2	3	1	4	0
Slipe Lane Lake	0	0	0	1	1	1	0	1	1	0	2	0
Turnford Lakes	0	0	0	1	0	0	0	1	1	0	0	0
ex-Herts:	9	7	8	3	2	5	10	2	8	4	7	11
ex-Herts:
Friday Lake	2	0	0	0	0	0	1	1	3	1	1	0
Hooks Marsh GP	3	6	7	2	2	2	3	1	1	1	1	7
Met Police Pit	2	0	0	0	0	1	2	0	2	0	2	0
Seventy Acres Lake	2	1	1	1	0	2	4	nc	2	2	3	4
Essex:	2	6	1	1	1	1	0	0	0	1	1	1
Essex:
Hall Marsh Scrape	0	1	1	1	1	1	0	0	0	1	1	1
Holyfield Marsh Lake	2	5	nc	nc	nc	nc	nc	nc	0	0	nc	nc
Radwell Mill	0	nc	0	0	nc	0	nc	0	1	0	0	0
Panshanger Park	2	4	0	0	nc	nc	nc	nc	2	0	0	2
Fairlands Valley Park	0	0	0	0	0	0	1	0	1	nc	0	0
Verulamium Park	4	0	3	1	1	6	nc	3	3	0	1	1
Tyttenhanger GPs - all	Present	11	4	8	6	15	Present	3	5	5	6	7
Hilfield Park Reservoir	2	1	0	0	0	0	2	2	1	0	2	4
Tring Reservoirs	7	18	nc	11	5	10	6	9	19	nc	12	nc

MoorhenTop of page

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Colne Valley:	49	50	28	29	13	12	23	38	31	60	50	42
Batchworth Lake	6	5	2	6	nc	4	1	0	2	7	4	6
Stocker's and Bury Lakes	24	20	10	8	6	2	7	12	10	15	19	14
Maple Lodge NR	3	4	5	4	6	4	8	14	11	19	11	9
Lynsters Lake	2	nc	1	0	0	0	0	4	1	0	0	1
Pynesfield North/South Lakes	0	3	2	3	1	0	2	1	3	9	6	5
Helicon Lake	9	6	3	3	0	0	3	2	2	4	6	2
Troy Mill Lake	5	12	5	5	0	2	2	5	2	6	4	5
Lea Valley:	129	124	137	54	38	37	49	60	167	173	143	87
Lea Valley:
East Hyde	43	14	13	16	8	12	11	14	17	21	12	16
Brocket Park	22	20	16	6	11	6	6	15	15	nc	20	14
Amwell GP - Ware / Thrift GP	nc	nc	nc	5	2	2	9	4	9	6	3	7
Amwell NR - others	nc	10	14	6	3	7	8	nc	12	13	14	9
Stanstead Abbotts Lakes - N lake	3	8	5	4	4	4	4	9	10	5	7	2
Rye Meads	38	43	46	nc	nc	nc	nc	nc	74	91	38	17
Broxbourne GP	9	9	11	4	1	3	nc	5	8	1	13	4
Cheshunt GPs:	14	20	32	13	9	3	11	13	22	36	36	18
Cheshunt GPs:
Herts:	6	11	15	5	2	2	2	12	16	8	17	9
Herts:
Bowyers Water	4	4	12	2	2	2	2	6	9	4	4	7
Cheshunt Lake	0	2	0	0	0	0	0	1	0	0	3	0
Northmet Lake	1	1	2	2	0	0	0	2	2	2	2	1
Slipe Lane Lake	1	3	0	1	0	0	0	1	4	1	4	1
Turnford Lakes	0	1	1	0	0	0	0	2	1	1	4	0
ex-Herts:	8	9	15	5	4	1	8	1	5	10	17	9
ex-Herts:
Friday Lake	0	0	0	0	0	0	1	1	0	0	0	0
Hooks Marsh GP	5	6	6	1	0	0	1	0	2	4	1	2
Met Police Pit	0	0	0	0	0	0	1	0	1	0	1	0
Seventy Acres Lake	3	3	9	4	4	1	5	nc	2	6	15	7
Essex:	0	0	2	3	3	0	1	0	1	18	2	0
Essex:
Hall Marsh Scrape	0	0	2	3	3	0	1	0	1	1	2	0
Holyfield Marsh Lake	Present	0	nc	nc	nc	nc	nc	nc	0	17	nc	nc
Radwell Mill	1	nc	4	1	nc	3	nc	9	12	4	2	0
Panshanger Park	4	7	5	2	nc	nc	nc	nc	17	8	3	7
Fairlands Valley Park	39	28	18	21	15	11	15	29	42	nc	38	45
Verulamium Park	14	4	11	11	3	3	nc	9	5	8	15	10
Tyttenhanger GPs - all	Present	30	5	16	4	7	Present	15	18	19	25	16
Hilfield Park Reservoir	2	0	1	0	0	0	7	3	1	7	4	2
Tring Reservoirs	35	23	nc	6	3	6	22	49	72	nc	70	nc

CootTop of page

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Colne Valley:	1069	602	662	382	225	204	268	592	624	919	1202	1027
Batchworth Lake	16	17	17	29	nc	13	28	34	24	22	35	33
Stocker's and Bury Lakes	262	210	192	128	68	31	34	191	279	540	606	539
Maple Lodge NR	14	22	24	18	15	15	12	13	15	7	5	2
Lynsters Lake	205	nc	107	45	36	26	0	47	93	170	312	143
Pynesfield North/South Lakes	132	89	101	46	31	30	47	74	121	119	158	176
Helicon Lake	90	48	43	24	17	17	35	33	62	47	76	122
Troy Mill Lake	350	216	178	92	58	72	112	200	30	14	10	12
Lea Valley:	1759	1387	910	515	369	390	481	611	1472	1516	1482	1705
Lea Valley:
East Hyde	25	12	17	12	12	6	6	10	17	17	17	8
Brocket Park	67	66	46	31	27	28	39	64	72	nc	96	116
Amwell GP - Ware / Thrift GP	nc	nc	nc	24	20	16	24	31	24	21	15	7
Amwell NR - others	nc	77	60	36	42	33	83	nc	185	270	278	355
Stanstead Abbotts Lakes - N lake	99	76	57	37	35	40	30	66	95	224	173	203
Rye Meads	107	134	122	nc	nc	nc	nc	nc	523	319	308	115
Broxbourne GP	488	343	211	103	89	54	nc	133	99	53	66	87
Cheshunt GPs:	973	679	397	272	144	213	299	307	457	612	529	814
Cheshunt GPs:
Herts:	695	466	267	176	88	121	196	278	287	411	449	678
Herts:
Bowyers Water	290	153	109	57	35	68	138	148	157	226	165	414
Cheshunt Lake	14	22	5	10	8	6	3	10	4	4	22	14
Northmet Lake	167	112	67	56	23	17	31	70	62	101	142	84
Slipe Lane Lake	108	94	53	30	10	13	12	34	34	49	53	74
Turnford Lakes	116	85	33	23	12	17	12	16	30	31	67	92
ex-Herts:	181	148	119	89	48	91	101	29	91	46	79	133
ex-Herts:
Friday Lake	34	19	5	25	8	6	11	11	10	3	2	2
Hooks Marsh GP	22	27	30	16	11	14	23	16	5	4	23	69
Met Police Pit	0	7	1	8	0	2	4	2	4	6	6	2
Seventy Acres Lake	125	95	83	40	29	69	63	nc	72	33	48	60
Essex:	97	65	11	7	8	1	2	0	79	155	1	3
Essex:
Hall Marsh Scrape	1	7	11	7	8	1	2	0	1	3	1	3
Holyfield Marsh Lake	96	58	nc	nc	nc	nc	nc	nc	78	152	nc	nc
Radwell Mill	1	nc	2	3	nc	3	nc	0	0	0	1	1
Panshanger Park	121	120	104	69	nc	nc	nc	nc	138	166	164	161
Fairlands Valley Park	33	36	35	19	13	26	28	38	37	nc	40	25
Verulamium Park	49	64	31	24	23	28	nc	14	10	13	14	9
Tyttenhanger GPs - all	Present	70	40	42	28	25	Present	50	140	105	113	90
Hilfield Park Reservoir	34	60	54	56	47	76	177	155	136	169	122	35
Tring Reservoirs	132	139	nc	105	105	293	316	559	608	nc	582	nc