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 2015 the Hertfordshire counts were organised by Cath Patrick and Dawn Richardson (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 2015 the counts were undertaken on the following Sundays; 18 Jan, 8 Feb, 8 Mar, 12 Apr, 17 May, 14 Jun, 19 Jul, 16 Aug, 13 Sep, 18 Oct, 15 Nov and 13 Dec. The scheme organisers have agreed that the Lee Valley counts can be undertaken the previous Saturday.

Sincere thanks are due to everyone who contributes to this important monitoring project and especially to Cath, Dawn 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, Bullís Cross, Enfield, EN2, 9HG) if you are able to help. Thank you.


Mute SwanTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley: 77 66 50 56 27 41 44 65 51 65 84 82
Batchworth Lake 0 0 2 1 0 2 2 2 0 0 2 3
Stocker's and Bury Lakes 27 24 30 34 25 38 36 47 36 39 37 38
Maple Lodge NR 1 1 3 2 0 1 0 0 0 0 0 0
Lynsters Lake 31 31 6 8 0 nc 3 5 5 5 0 4
Pynesfield North/South Lakes 3 3 3 3 0 nc 1 2 2 2 2 2
Helicon Lake 0 1 1 1 1 nc 0 1 1 2 0 2
Troy Mill Lake 15 6 5 7 1 nc 2 8 7 17 43 33
Lea Valley:
East Hyde 3 4 4 4 4 4 4 4 4 2 2 1
Brocket Park 2 2 2 1 2 0 2 nc 0 9 8 nc
Stanborough Lakes North 11 11 4 2 2 nc nc nc nc nc nc nc
Stanborough Lakes South 0 0 4 5 13 nc nc nc nc nc nc nc
King's Meads 6 2 6 10 7 6 nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP nc 0 0 0 0 nc nc nc 3 nc 0 1
Amwell NR - others 9 2 0 4 5 2 4 10 nc 2 3 8
Stanstead Abbotts Lakes - N lake 3 4 3 nc nc nc nc 7 8 6 2 4
Rye Meads 6 2 6 nc nc nc nc nc 17 17 11 8
Cheshunt GPs:
Radwell Mill 8 nc 7 nc 13 12 12 nc 2 1 13 12
Panshanger Park 2 2 nc 2 3 5 nc 4 4 4 nc 4
Fairlands Valley Park 4 nc nc nc nc nc nc nc nc nc nc nc
Verulamium Park 15 15 7 12 5 6 8 15 13 17 15 10
Tyttenhanger GPs - all 3 nc 4 6 4 4 3 1 2 0 7 2
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 0 0 0 2 4 2 4 2 nc 0 2 0
Tring Reservoirs 18 11 15 10 13 25 48 59 42 50 nc 28

Canada GooseTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley: 32 102 115 124 62 134 117 58 65 119 108 112
Batchworth Lake 9 20 32 43 8 27 14 6 8 4 8 2
Stocker's and Bury Lakes 20 74 34 64 47 105 32 37 56 40 66 33
Maple Lodge NR 0 0 0 3 1 2 0 0 0 0 0 0
Lynsters Lake 2 6 47 4 6 nc 0 2 0 0 29 48
Pynesfield North/South Lakes 0 0 2 2 0 nc 0 0 0 0 0 0
Helicon Lake 0 2 0 6 0 nc 1 0 0 26 0 25
Troy Mill Lake 1 0 0 2 0 nc 70 13 1 49 5 4
Lea Valley:
East Hyde 22 55 57 18 18 14 14 14 49 78 87 82
Brocket Park 64 13 2 2 6 11 14 nc 2 77 127 nc
Stanborough Lakes North 6 46 58 34 28 nc nc nc nc nc nc nc
Stanborough Lakes South 0 0 0 0 2 nc nc nc nc nc nc nc
King's Meads 30 4 3 2 2 0 nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP nc 2 8 13 13 nc nc nc 0 nc 0 0
Amwell NR - others 41 74 67 90 103 72 89 205 nc 71 0 0
Stanstead Abbotts Lakes - N lake 4 16 29 nc nc nc nc 20 16 4 7 31
Rye Meads 0 0 9 nc nc nc nc nc 0 0 10 6
Cheshunt GPs:
Radwell Mill 5 nc 10 nc 13 1 10 nc 65 0 0 0
Panshanger Park 46 65 nc 57 44 67 nc 6 38 0 nc 0
Fairlands Valley Park 59 nc nc nc nc nc nc nc nc nc nc nc
Verulamium Park 75 51 56 36 53 71 100 83 79 50 52 69
Tyttenhanger GPs - all 1 nc 37 7 15 33 0 140 198 11 45 50
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 0 8 0 6 9 158 127 165 nc 9 6 0
Tring Reservoirs 15 11 27 19 6 95 52 61 4 48 nc 3

WigeonTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley: 72 146 81 0 0 0 0 0 0 41 198 155
Batchworth Lake 0 0 0 0 0 0 0 0 0 0 0 0
Stocker's and Bury Lakes 53 134 79 0 0 0 0 0 0 0 0 41
Maple Lodge NR 0 0 0 0 0 0 0 0 0 0 0 0
Lynsters Lake 0 4 2 0 0 nc 0 0 0 0 0 2
Pynesfield North/South Lakes 13 8 0 0 0 nc 0 0 0 0 0 0
Helicon Lake 0 0 0 0 0 nc 0 0 0 0 0 0
Troy Mill Lake 6 0 0 0 0 nc 0 0 0 41 198 112
Lea Valley:
East Hyde 1 0 0 0 0 0 0 0 0 0 0 0
Brocket Park 0 0 0 0 0 0 0 nc 0 0 0 nc
Stanborough Lakes North 0 0 0 0 0 nc nc nc nc nc nc nc
Stanborough Lakes South 0 0 0 0 0 nc nc nc nc nc nc nc
King's Meads 8 28 4 0 0 0 nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP nc 0 0 0 0 nc nc nc 0 nc 0 0
Amwell NR - others 52 0 2 0 0 0 0 0 nc 55 75 63
Stanstead Abbotts Lakes - N lake 0 0 0 nc nc nc nc 0 0 0 0 0
Rye Meads 0 0 0 nc nc nc nc nc 3 26 2 1
Cheshunt GPs:
Radwell Mill 0 nc 0 nc 0 0 0 nc 0 0 0 0
Panshanger Park 0 0 nc 0 0 0 nc 0 13 54 nc Present
Fairlands Valley Park 0 nc nc nc nc nc nc nc nc nc nc nc
Verulamium Park 0 0 0 0 0 0 0 0 0 0 0 0
Tyttenhanger GPs - all 0 nc 1 0 0 0 0 0 0 0 0 4
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 177 0 0 0 0 0 0 0 nc 68 5 0
Tring Reservoirs 232 107 66 0 0 0 0 0 39 322 nc 113

GadwallTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley: 136 125 21 11 19 9 168 132 7 100 255 245
Batchworth Lake 0 0 0 0 0 0 0 0 0 0 0 0
Stocker's and Bury Lakes 80 105 6 2 1 0 26 18 7 15 17 43
Maple Lodge NR 4 0 0 7 16 9 29 4 0 0 0 0
Lynsters Lake 0 12 12 0 2 nc 0 0 0 10 0 16
Pynesfield North/South Lakes 32 5 0 0 0 nc 0 0 0 3 4 8
Helicon Lake 16 3 0 0 0 nc 0 0 0 0 2 12
Troy Mill Lake 4 0 3 2 0 nc 113 110 0 72 232 166
Lea Valley:
East Hyde 24 4 2 0 0 0 0 0 0 0 12 14
Brocket Park 0 0 0 0 0 0 0 nc 0 0 0 nc
Stanborough Lakes North 0 6 10 1 0 nc nc nc nc nc nc nc
Stanborough Lakes South 0 0 0 0 0 nc nc nc nc nc nc nc
King's Meads 24 42 76 32 16 22 nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP nc 3 2 3 3 nc nc nc 2 nc 2 4
Amwell NR - others 53 13 22 10 10 35 43 41 nc 59 107 137
Stanstead Abbotts Lakes - N lake 55 47 38 nc nc nc nc 20 22 57 59 81
Rye Meads 121 68 128 nc nc nc nc nc 339 446 387 42
Cheshunt GPs:
Radwell Mill 24 nc 24 nc 0 4 0 nc 1 6 3 0
Panshanger Park 248 46 nc 6 6 28 nc 9 136 261 nc 130
Fairlands Valley Park 0 nc nc nc nc nc nc nc nc nc nc nc
Verulamium Park 0 4 0 0 0 0 0 12 0 16 2 4
Tyttenhanger GPs - all 6 nc 12 2 2 6 4 11 0 20 18 4
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 11 11 4 21 10 31 57 31 nc 8 9 12
Tring Reservoirs 52 36 40 12 9 26 25 18 17 60 nc 26

TealTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley: 6 14 7 0 0 0 2 5 7 12 16 18
Batchworth Lake 0 0 0 0 0 0 0 0 0 0 0 0
Stocker's and Bury Lakes 3 5 0 0 0 0 0 0 1 0 0 1
Maple Lodge NR 3 9 2 0 0 0 2 5 6 12 14 17
Lynsters Lake 0 0 3 0 0 nc 0 0 0 0 0 0
Pynesfield North/South Lakes 0 0 0 0 0 nc 0 0 0 0 0 0
Helicon Lake 0 0 0 0 0 nc 0 0 0 0 0 0
Troy Mill Lake 0 0 2 0 0 nc 0 0 0 0 2 0
Lea Valley:
East Hyde 2 10 0 0 0 0 0 0 0 0 0 0
Brocket Park 0 0 0 0 0 0 0 nc 0 0 0 nc
Stanborough Lakes North 0 0 0 0 0 nc nc nc nc nc nc nc
Stanborough Lakes South 0 0 0 0 0 nc nc nc nc nc nc nc
King's Meads 22 15 11 5 0 0 nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP nc 0 0 0 0 nc nc nc 0 nc 0 0
Amwell NR - others 1 10 17 4 0 1 0 5 nc 9 8 19
Stanstead Abbotts Lakes - N lake 1 1 7 nc nc nc nc 0 0 2 1 5
Rye Meads 127 95 68 nc nc nc nc nc 84 98 154 141
Cheshunt GPs:
Radwell Mill 0 nc 0 nc 0 0 0 nc 0 0 0 0
Panshanger Park 60 18 nc 6 0 0 nc 0 24 18 nc 62
Fairlands Valley Park 0 nc nc nc nc nc nc nc nc nc nc nc
Verulamium Park 0 0 0 0 0 0 0 0 0 0 0 0
Tyttenhanger GPs - all 14 nc 8 2 0 0 2 0 3 4 5 10
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 2 0 0 0 0 0 0 0 nc 0 0 0
Tring Reservoirs 405 50 65 14 0 0 2 41 460 538 nc 233

MallardTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley: 148 122 115 72 72 70 93 116 79 124 130 141
Batchworth Lake 67 32 22 20 16 25 30 41 6 19 18 17
Stocker's and Bury Lakes 54 55 45 22 38 34 22 18 36 48 45 65
Maple Lodge NR 13 12 22 17 0 11 15 28 13 31 30 32
Lynsters Lake 0 6 4 5 2 nc 8 0 2 2 0 4
Pynesfield North/South Lakes 3 2 3 4 7 nc 9 9 6 13 11 11
Helicon Lake 3 4 12 2 5 nc 0 8 6 9 4 9
Troy Mill Lake 8 11 7 2 4 nc 9 12 10 2 22 3
Lea Valley:
East Hyde 65 41 20 20 20 15 10 10 10 20 32 42
Brocket Park 11 7 9 4 6 0 29 nc 8 11 7 nc
Stanborough Lakes North 51 69 71 39 64 nc nc nc nc nc nc nc
Stanborough Lakes South 17 18 25 14 17 nc nc nc nc nc nc nc
King's Meads 16 36 27 20 30 28 nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP nc 10 6 7 20 nc nc nc 4 nc 11 34
Amwell NR - others 24 32 23 17 18 20 70 68 nc 93 33 74
Stanstead Abbotts Lakes - N lake 20 30 21 nc nc nc nc 4 50 26 52 77
Rye Meads 0 47 55 nc nc nc nc nc 46 45 48 57
Cheshunt GPs:
Radwell Mill 74 nc 25 nc 31 53 101 nc 50 62 75 59
Panshanger Park 67 93 nc 111 75 95 nc 77 43 37 nc 111
Fairlands Valley Park 165 nc nc nc nc nc nc nc nc nc nc nc
Verulamium Park 89 138 165 110 76 118 44 94 116 54 97 64
Tyttenhanger GPs - all 38 nc 11 23 23 32 24 50 67 81 80 28
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 2 10 6 7 9 4 2 3 nc 10 2 2
Tring Reservoirs 80 94 83 89 62 173 380 422 344 306 nc 124

ShovelerTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley: 31 51 86 5 0 0 3 19 8 24 21 20
Batchworth Lake 5 0 0 0 0 0 0 0 0 0 0 0
Stocker's and Bury Lakes 22 49 74 3 0 0 0 0 3 5 13 8
Maple Lodge NR 2 2 0 2 0 0 3 9 5 19 4 12
Lynsters Lake 2 0 0 0 0 nc 0 0 0 0 0 0
Pynesfield North/South Lakes 0 0 0 0 0 nc 0 0 0 0 0 0
Helicon Lake 0 0 0 0 0 nc 0 0 0 0 0 0
Troy Mill Lake 0 0 12 0 0 nc 0 10 0 0 4 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 nc 0 0 0 nc
Stanborough Lakes North 0 0 0 0 0 nc nc nc nc nc nc nc
Stanborough Lakes South 0 0 0 0 0 nc nc nc nc nc nc nc
King's Meads 3 14 20 21 0 2 nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP nc 0 0 0 0 nc nc nc 0 nc 0 7
Amwell NR - others 98 138 36 12 1 1 2 3 nc 45 23 15
Stanstead Abbotts Lakes - N lake 4 3 13 nc nc nc nc 0 4 12 8 9
Rye Meads 33 28 65 nc nc nc nc nc 92 94 75 65
Cheshunt GPs:
Radwell Mill 0 nc 0 nc 0 0 0 nc 0 0 2 1
Panshanger Park 12 14 nc 0 0 0 nc 0 1 0 nc 8
Fairlands Valley Park 0 nc nc nc nc nc nc nc nc nc nc nc
Verulamium Park 4 1 0 0 0 0 0 0 0 2 8 11
Tyttenhanger GPs - all 12 nc 3 2 2 3 0 2 4 0 6 5
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 27 38 27 12 0 0 1 0 nc 3 35 14
Tring Reservoirs 210 137 175 13 0 8 1 24 148 120 nc 152

PochardTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley: 50 89 28 26 23 16 16 7 20 148 80 63
Batchworth Lake 11 5 0 0 0 0 0 0 0 0 0 0
Stocker's and Bury Lakes 34 76 16 7 7 1 6 2 18 148 37 55
Maple Lodge NR 4 0 5 19 13 15 9 5 1 0 0 0
Lynsters Lake 0 0 0 0 0 nc 1 0 1 0 0 0
Pynesfield North/South Lakes 0 7 7 0 2 nc 0 0 0 0 18 7
Helicon Lake 0 1 0 0 0 nc 0 0 0 0 0 0
Troy Mill Lake 1 0 0 0 1 nc 0 0 0 0 25 1
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 nc 0 0 0 nc
Stanborough Lakes North 0 0 0 0 0 nc nc nc nc nc nc nc
Stanborough Lakes South 0 0 0 0 0 nc nc nc nc nc nc nc
King's Meads 4 10 8 18 14 4 nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP nc 7 10 6 8 nc nc nc 11 nc 22 5
Amwell NR - others 44 53 8 11 7 20 26 34 nc 7 19 34
Stanstead Abbotts Lakes - N lake 11 2 11 nc nc nc nc 2 2 20 15 11
Rye Meads 15 7 12 nc nc nc nc nc 0 0 6 6
Cheshunt GPs:
Radwell Mill 0 nc 0 nc 0 0 0 nc 0 0 0 1
Panshanger Park 4 22 nc 3 6 4 nc 3 14 6 nc 6
Fairlands Valley Park 0 nc nc nc nc nc nc nc nc nc nc nc
Verulamium Park 8 3 2 0 0 0 0 0 0 2 2 4
Tyttenhanger GPs - all 3 nc 2 0 0 4 2 1 0 0 0 5
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 39 31 1 1 0 66 152 36 nc 3 4 7
Tring Reservoirs 210 130 40 8 1 2 8 28 77 220 nc 243

Tufted DuckTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley: 406 324 339 151 104 64 135 122 130 204 406 335
Batchworth Lake 15 20 43 16 3 3 0 3 8 23 12 8
Stocker's and Bury Lakes 203 128 143 67 21 25 31 64 60 106 161 166
Maple Lodge NR 10 18 24 18 30 36 7 10 4 4 3 6
Lynsters Lake 41 30 50 29 9 nc 11 2 9 23 92 62
Pynesfield North/South Lakes 75 40 45 13 21 nc 64 25 19 23 76 58
Helicon Lake 40 29 17 8 8 nc 7 5 5 10 31 19
Troy Mill Lake 22 59 17 0 12 nc 15 13 25 15 31 16
Lea Valley:
East Hyde 0 0 0 0 0 2 0 0 0 0 0 0
Brocket Park 13 11 12 11 11 23 2 nc 6 2 7 nc
Stanborough Lakes North 0 0 6 0 5 nc nc nc nc nc nc nc
Stanborough Lakes South 0 0 0 0 0 nc nc nc nc nc nc nc
King's Meads 8 14 25 16 17 29 nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP nc 40 60 85 43 nc nc nc 49 nc 103 89
Amwell NR - others 114 95 56 92 57 11 69 107 nc 96 123 115
Stanstead Abbotts Lakes - N lake 95 56 66 nc nc nc nc 44 75 89 105 106
Rye Meads 94 77 79 nc nc nc nc nc 89 51 64 36
Cheshunt GPs:
Radwell Mill 1 nc 2 nc 2 0 0 nc 1 0 0 0
Panshanger Park 70 51 nc 74 52 44 nc 38 18 20 nc 42
Fairlands Valley Park 0 nc nc nc nc nc nc nc nc nc nc nc
Verulamium Park 4 15 11 23 12 31 1 2 2 6 1 4
Tyttenhanger GPs - all 8 nc 15 12 6 0 3 6 0 5 24 22
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 113 103 83 66 4 40 165 218 nc 30 27 58
Tring Reservoirs 137 176 180 224 85 76 92 233 250 218 nc 374

GoldeneyeTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley: 17 10 4 0 0 0 0 0 0 0 1 7
Batchworth Lake 0 0 0 0 0 0 0 0 0 0 0 0
Stocker's and Bury Lakes 17 10 4 0 0 0 0 0 0 0 0 6
Maple Lodge NR 0 0 0 0 0 0 0 0 0 0 0 0
Lynsters Lake 0 0 0 0 0 nc 0 0 0 0 0 0
Pynesfield North/South Lakes 0 0 0 0 0 nc 0 0 0 0 0 0
Helicon Lake 0 0 0 0 0 nc 0 0 0 0 0 0
Troy Mill Lake 0 0 0 0 0 nc 0 0 0 0 1 1
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 nc 0 0 0 nc
Stanborough Lakes North 0 0 0 0 0 nc nc nc nc nc nc nc
Stanborough Lakes South 0 0 0 0 0 nc nc nc nc nc nc nc
King's Meads 0 0 0 0 0 0 nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP nc 0 0 0 0 nc nc nc 0 nc 0 0
Amwell NR - others 2 4 11 0 0 0 0 0 nc 0 0 1
Stanstead Abbotts Lakes - N lake 1 0 1 nc nc nc nc 0 0 0 0 0
Rye Meads 0 0 0 nc nc nc nc nc 0 0 0 0
Cheshunt GPs:
Radwell Mill 0 nc 0 nc 0 0 0 nc 0 0 0 0
Panshanger Park 0 0 nc 0 0 0 nc 0 0 0 nc 0
Fairlands Valley Park 0 nc nc nc nc nc nc nc nc nc nc nc
Verulamium Park 0 0 0 0 0 0 0 0 0 0 0 0
Tyttenhanger GPs - all 0 nc 0 0 0 0 0 0 0 0 0 0
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 1 3 4 0 0 0 0 0 nc 1 0 0
Tring Reservoirs 3 6 4 0 0 0 0 0 0 0 nc 1

Ruddy DuckTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley: 0 0 0 0 0 0 0 0 0 0 0 0
Batchworth Lake 0 0 0 0 0 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 0 0 0 0 nc 0 0 0 0 0 0
Pynesfield North/South Lakes 0 0 0 0 0 nc 0 0 0 0 0 0
Helicon Lake 0 0 0 0 0 nc 0 0 0 0 0 0
Troy Mill Lake 0 0 0 0 0 nc 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 nc 0 0 0 nc
Stanborough Lakes North 0 0 0 0 0 nc nc nc nc nc nc nc
Stanborough Lakes South 0 0 0 0 0 nc nc nc nc nc nc nc
King's Meads 0 0 0 0 0 0 nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP nc 0 0 0 0 nc nc nc 0 nc 0 0
Amwell NR - others 0 0 0 0 0 0 0 0 nc 0 0 0
Stanstead Abbotts Lakes - N lake 0 0 0 nc nc nc nc 0 0 0 0 0
Rye Meads 0 0 0 nc nc nc nc nc 0 0 0 0
Cheshunt GPs:
Radwell Mill 0 nc 0 nc 0 0 0 nc 0 0 0 0
Panshanger Park 0 0 nc 0 0 0 nc 0 0 0 nc 0
Fairlands Valley Park 0 nc nc nc nc nc nc nc nc nc nc nc
Verulamium Park 0 0 0 0 0 0 0 0 0 0 0 0
Tyttenhanger GPs - all 0 nc 0 0 0 0 0 0 0 0 0 0
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 0 0 0 0 0 0 0 0 nc 0 0 0
Tring Reservoirs 0 0 0 0 0 0 0 0 0 0 nc 0

Little GrebeTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley: 2 8 7 5 7 6 9 9 7 5 6 5
Batchworth Lake 0 0 0 0 0 0 0 1 1 0 0 0
Stocker's and Bury Lakes 0 0 1 0 0 0 1 0 0 0 0 0
Maple Lodge NR 1 5 6 5 7 6 7 8 6 5 6 5
Lynsters Lake 0 0 0 0 0 nc 0 0 0 0 0 0
Pynesfield North/South Lakes 1 3 0 0 0 nc 1 0 0 0 0 0
Helicon Lake 0 0 0 0 0 nc 0 0 0 0 0 0
Troy Mill Lake 0 0 0 0 0 nc 0 0 0 0 0 0
Lea Valley:
East Hyde 3 3 2 2 2 2 2 2 1 0 2 1
Brocket Park 10 9 5 1 3 4 10 nc 4 9 12 nc
Stanborough Lakes North 2 1 0 0 0 nc nc nc nc nc nc nc
Stanborough Lakes South 0 0 0 0 0 nc nc nc nc nc nc nc
King's Meads 1 4 6 6 3 4 nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP nc 0 0 0 0 nc nc nc 0 nc 0 0
Amwell NR - others 0 1 1 0 0 0 0 0 nc 1 0 0
Stanstead Abbotts Lakes - N lake 0 1 2 nc nc nc nc 1 2 1 4 4
Rye Meads 16 15 15 nc nc nc nc nc 58 36 40 18
Cheshunt GPs:
Radwell Mill 0 nc 0 nc 0 0 0 nc 0 0 0 0
Panshanger Park 27 23 nc 14 12 12 nc 29 30 32 nc 23
Fairlands Valley Park 0 nc nc nc nc nc nc nc nc nc nc nc
Verulamium Park 0 0 0 0 0 1 0 0 0 0 0 0
Tyttenhanger GPs - all 0 nc 0 0 1 0 0 0 0 0 0 0
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 0 0 3 6 2 0 6 2 nc 0 0 0
Tring Reservoirs 15 0 10 9 2 2 2 5 15 18 nc 14

Great Crested GrebeTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley: 42 35 47 41 39 23 57 49 63 53 36 40
Batchworth Lake 3 2 4 5 2 6 6 3 7 5 3 3
Stocker's and Bury Lakes 7 5 9 11 12 14 17 18 16 18 13 20
Maple Lodge NR 0 0 2 3 3 3 2 2 1 0 3 1
Lynsters Lake 0 4 4 5 8 nc 10 9 8 6 3 6
Pynesfield North/South Lakes 7 8 9 6 6 nc 10 10 24 22 8 9
Helicon Lake 4 2 4 3 0 nc 1 0 6 0 3 0
Troy Mill Lake 21 14 15 8 8 nc 11 7 1 2 3 1
Lea Valley:
East Hyde 0 0 0 0 0 1 0 0 0 0 0 0
Brocket Park 1 0 2 1 2 2 2 nc 3 3 0 nc
Stanborough Lakes North 0 0 5 2 0 nc nc nc nc nc nc nc
Stanborough Lakes South 6 3 6 6 4 nc nc nc nc nc nc nc
King's Meads 0 0 0 0 0 0 nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP nc 3 3 3 1 nc nc nc 9 nc 3 3
Amwell NR - others 8 5 17 5 6 7 4 7 nc 8 4 1
Stanstead Abbotts Lakes - N lake 4 1 4 nc nc nc nc 10 7 7 5 5
Rye Meads 0 0 0 nc nc nc nc nc 4 3 1 0
Cheshunt GPs:
Radwell Mill 0 nc 0 nc 0 0 0 nc 0 0 0 0
Panshanger Park 0 2 nc 7 5 5 nc 17 8 0 nc 2
Fairlands Valley Park 0 nc nc nc nc nc nc nc nc nc nc nc
Verulamium Park 0 0 0 1 0 2 0 0 0 0 0 0
Tyttenhanger GPs - all 0 nc 21 7 15 13 13 10 16 13 18 23
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 19 12 19 18 17 43 52 74 nc 25 7 8
Tring Reservoirs 71 74 27 45 47 31 31 50 57 62 nc 50

CormorantTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley: 52 52 24 31 16 14 9 21 19 28 36 49
Batchworth Lake 1 0 0 0 1 2 0 2 0 0 2 1
Stocker's and Bury Lakes 33 29 7 14 6 4 3 2 9 16 18 18
Maple Lodge NR 0 2 0 9 7 8 Present 2 2 3 0 0
Lynsters Lake 0 6 5 3 1 nc 2 0 2 0 0 6
Pynesfield North/South Lakes 2 7 6 1 0 nc 0 2 0 3 2 0
Helicon Lake 0 5 0 2 0 nc 0 0 0 0 2 4
Troy Mill Lake 16 3 6 2 1 nc 4 13 6 6 12 20
Lea Valley:
East Hyde 1 2 1 2 2 0 3 2 1 2 2 2
Brocket Park 6 1 1 2 5 3 0 nc 4 6 10 nc
Stanborough Lakes North 7 1 3 0 0 nc nc nc nc nc nc nc
Stanborough Lakes South 0 1 0 0 0 nc nc nc nc nc nc nc
King's Meads 2 2 1 2 2 4 nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP nc 1 0 0 1 nc nc nc 1 nc 1 0
Amwell NR - others 38 29 26 59 58 43 16 21 nc 95 35 14
Stanstead Abbotts Lakes - N lake 10 6 2 nc nc nc nc 8 3 6 14 12
Rye Meads 6 1 1 nc nc nc nc nc 43 28 18 8
Cheshunt GPs:
Radwell Mill 0 nc 0 nc 0 0 0 nc 0 0 0 0
Panshanger Park 1 3 nc 2 2 2 nc 3 3 1 nc 3
Fairlands Valley Park 6 nc nc nc nc nc nc nc nc nc nc nc
Verulamium Park 2 1 1 0 0 1 1 1 4 9 2 4
Tyttenhanger GPs - all 15 nc 16 4 1 2 2 13 6 7 17 64
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 43 6 1 9 0 0 6 12 nc 3 2 1
Tring Reservoirs 62 40 36 34 27 44 46 45 62 56 nc 54

Grey HeronTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley: 14 15 30 11 11 6 13 12 9 8 12 17
Batchworth Lake 0 0 0 0 0 2 4 1 4 1 0 0
Stocker's and Bury Lakes 10 9 27 10 7 4 7 2 1 2 6 5
Maple Lodge NR 0 0 2 1 1 0 0 2 2 2 2 0
Lynsters Lake 1 2 0 0 1 nc 0 0 0 0 0 1
Pynesfield North/South Lakes 0 2 1 0 1 nc 0 3 1 2 2 4
Helicon Lake 0 1 0 0 0 nc 0 1 1 0 1 2
Troy Mill Lake 3 1 0 0 1 nc 2 3 0 1 1 5
Lea Valley:
East Hyde 4 2 3 1 2 3 3 3 1 4 2 3
Brocket Park 0 0 0 0 3 1 1 nc 0 1 1 nc
Stanborough Lakes North 2 3 2 5 1 nc nc nc nc nc nc nc
Stanborough Lakes South 0 0 0 0 2 nc nc nc nc nc nc nc
King's Meads 1 2 2 1 1 1 nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP nc 1 0 1 0 nc nc nc 1 nc 0 1
Amwell NR - others 12 10 17 18 24 2 6 4 nc 5 5 2
Stanstead Abbotts Lakes - N lake 1 0 1 nc nc nc nc 1 0 0 2 2
Rye Meads 1 1 2 nc nc nc nc nc 5 3 7 7
Cheshunt GPs:
Radwell Mill 1 nc 0 nc 0 1 2 nc 0 0 1 1
Panshanger Park 7 0 nc 1 1 2 nc 1 0 1 nc 3
Fairlands Valley Park 0 nc nc nc nc nc nc nc nc nc nc nc
Verulamium Park 0 5 7 11 7 7 3 1 0 0 1 2
Tyttenhanger GPs - all 4 nc 11 5 7 2 3 3 2 1 3 2
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 1 1 1 1 0 0 1 1 nc 1 0 1
Tring Reservoirs 8 9 29 15 13 9 21 11 8 13 nc 11

MoorhenTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley: 39 54 58 32 24 13 27 37 40 43 40 48
Batchworth Lake 9 11 10 14 5 2 6 9 6 7 5 8
Stocker's and Bury Lakes 23 17 18 3 7 2 2 5 8 16 13 17
Maple Lodge NR 1 4 10 9 9 9 11 15 11 7 9 10
Lynsters Lake 0 2 2 0 0 nc 0 0 1 0 0 0
Pynesfield North/South Lakes 1 5 4 4 0 nc 2 3 2 3 7 10
Helicon Lake 2 9 10 1 1 nc 4 2 2 2 0 2
Troy Mill Lake 3 6 4 1 2 nc 2 3 10 8 6 1
Lea Valley:
East Hyde 32 20 27 16 16 16 8 8 10 10 12 25
Brocket Park 41 35 27 12 8 9 15 nc 19 21 15 nc
Stanborough Lakes North 18 16 14 5 5 nc nc nc nc nc nc nc
Stanborough Lakes South 8 7 5 8 1 nc nc nc nc nc nc nc
King's Meads 17 13 7 12 3 3 nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP nc 5 1 3 2 nc nc nc 6 nc 2 0
Amwell NR - others 11 10 25 15 4 2 10 18 nc 24 9 14
Stanstead Abbotts Lakes - N lake 6 2 6 nc nc nc nc 8 15 16 9 7
Rye Meads 62 92 53 nc nc nc nc nc 92 107 89 67
Cheshunt GPs:
Radwell Mill 0 nc 0 nc 2 2 4 nc 0 1 4 1
Panshanger Park 18 21 nc 21 Present 5 nc 22 20 27 nc 15
Fairlands Valley Park 15 nc nc nc nc nc nc nc nc nc nc nc
Verulamium Park 40 31 14 14 7 17 28 16 22 34 34 30
Tyttenhanger GPs - all 23 nc 13 2 4 8 9 Present 15 11 19 14
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 5 0 3 5 1 2 5 6 nc 10 2 1
Tring Reservoirs 48 31 33 29 8 9 26 64 75 70 nc 79

CootTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley: 1362 1041 694 451 360 175 797 943 1012 1063 1336 1191
Batchworth Lake 15 26 23 24 28 31 43 52 37 22 12 12
Stocker's and Bury Lakes 410 405 212 133 124 127 243 282 325 447 544 489
Maple Lodge NR 17 8 22 21 16 17 31 14 10 4 2 14
Lynsters Lake 137 203 127 89 44 nc 49 27 104 54 80 145
Pynesfield North/South Lakes 159 155 116 52 42 nc 69 58 52 72 48 53
Helicon Lake 95 64 47 29 10 nc 15 38 97 44 63 58
Troy Mill Lake 529 180 147 103 96 nc 347 472 387 420 587 420
Lea Valley:
East Hyde 20 15 15 12 12 8 8 8 11 10 5 14
Brocket Park 160 132 75 31 31 55 109 nc 87 106 122 nc
Stanborough Lakes North 38 50 33 12 26 nc nc nc nc nc nc nc
Stanborough Lakes South 3 3 5 7 3 nc nc nc nc nc nc nc
King's Meads 36 53 26 35 22 33 nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP nc 18 28 29 6 nc nc nc 36 nc 20 25
Amwell NR - others 310 133 98 98 46 40 160 288 nc 302 402 415
Stanstead Abbotts Lakes - N lake 175 144 85 nc nc nc nc 72 115 176 200 170
Rye Meads 266 192 160 nc nc nc nc nc 472 405 385 253
Cheshunt GPs:
Radwell Mill 3 nc 5 nc 3 6 4 nc 1 1 2 3
Panshanger Park 239 215 nc 72 67 97 nc 173 202 158 nc 152
Fairlands Valley Park 25 nc nc nc nc nc nc nc nc nc nc nc
Verulamium Park 80 87 81 74 73 86 74 60 81 69 77 84
Tyttenhanger GPs - all 105 nc 60 63 33 30 36 0 60 39 60 72
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 79 72 102 110 71 95 131 98 nc 11 13 18
Tring Reservoirs 767 500 305 232 250 394 616 757 900 867 nc 871