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

In 2013 the Hertfordshire counts were organised by Cath Patrick and Dawn Richardson (Lee Valley from Ware GP south) and Jim Terry (all other sites), and undertaken by dedicated observers each month. Some sites are not counted during the summer months (April to August) but otherwise coverage is very good.

The Sunday count dates in 2013 were; 13 Jan, 10 Feb, 10 Mar, 14 Apr, 12 May, 23 Jun, 21 Jul, 25 Aug, 22 Sep, 13 Oct, 10 Nov, and 15 Dec. With agreement from the scheme organisers, the Lee Valley counts continue to be undertaken on the previous Saturday.

Thanks are due to everyone who contributes to this important monitoring scheme, and to Jim Terry, and Cath Patrick for their co-ordination.

We are always looking for new volunteers to help with this national monitoring effort, not only to fill existing gaps in coverage, but also to take on other sites, that may hold significant numbers of wetland birds. The effort involves counting all water-birds at one wetland site once a month on the designated Saturday or Sunday – ideally throughout the year, but most importantly from January to March and September to December. 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 can help.


Mute SwanTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc 0 nc nc nc nc nc nc nc nc nc nc
Batchworth Lake 4 6 2 3 2 4 3 2 2 2 2 2
Stocker's and Bury Lakes 28 28 32 35 27 22 20 25 25 38 32 53
Maple Lodge NR 4 2 2 3 2 2 nc 0 2 0 0 nc
Lynsters Lake 2 2 2 2 3 3 nc nc 2 11 8 9
Pynesfield North/South Lakes 4 4 4 2 1 4 nc nc 3 2 2 2
Helicon Lake 1 2 0 3 0 1 nc 3 0 0 0 0
Troy Mill Lake 20 1 2 3 1 2 nc 8 4 0 0 0
Lea Valley:
East Hyde 7 5 2 2 2 2 2 2 2 2 2 2
Brocket Park 2 0 1 1 0 0 5 5 nc 4 3 4
Stanborough Lakes North nc 6 nc nc nc nc nc nc nc nc nc 12
Stanborough Lakes South nc nc 1 nc nc nc nc nc nc nc nc 0
King's Meads 3 3 2 5 13 10 4 nc nc nc nc nc
Amwell GP - Ware / Thrift GP 1 0 nc 0 0 nc nc nc 6 nc 4 0
Amwell NR - others 10 9 4 4 5 2 7 7 8 10 6 10
Stanstead Abbotts Lakes - N lake 4 3 2 nc nc nc nc nc 2 1 3 4
Rye Meads 10 9 4 nc nc nc nc nc 24 32 34 11
Broxbourne GP 7 0 nc nc nc nc nc nc nc nc nc nc
Cheshunt GPs:
Radwell Mill nc 7 7 3 15 12 10 9 9 8 7 9
Panshanger Park nc nc nc nc nc nc nc nc nc nc nc nc
Fairlands Valley Park 0 nc 0 8 4 nc nc nc nc 0 nc 0
Verulamium Park 16 15 16 12 12 12 5 12 18 16 12 14
Tyttenhanger GPs - all 10 3 0 3 Present 4 5 2 6 2 1 2
Aldenham Reservoir 6 0 1 7 nc 9 12 10 nc 9 26 25
Hilfield Park Reservoir 2 0 0 4 4 4 4 2 2 8 4 8
Tring Reservoirs 14 5 4 Present 7 0 14 12 58 47 38 49

Canada GooseTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc 15 nc nc nc nc nc nc nc nc nc nc
Batchworth Lake 6 32 48 31 17 21 25 0 1 0 0 2
Stocker's and Bury Lakes 18 36 41 64 52 162 129 28 15 11 56 13
Maple Lodge NR 0 0 7 11 7 0 nc 0 0 0 0 nc
Lynsters Lake 102 65 61 8 28 10 nc nc 0 0 2 9
Pynesfield North/South Lakes 0 2 0 0 0 0 nc nc 0 0 0 0
Helicon Lake 0 2 0 1 0 0 nc 0 14 7 0 5
Troy Mill Lake 0 0 0 1 8 0 nc 0 0 0 1 0
Lea Valley:
East Hyde 24 24 52 2 24 28 77 110 155 121 67 72
Brocket Park 38 31 12 0 8 6 0 0 nc 37 31 85
Stanborough Lakes North nc 26 nc nc nc nc nc nc nc nc nc 7
Stanborough Lakes South nc nc 0 nc nc nc nc nc nc nc nc 0
King's Meads 16 10 4 3 3 2 0 nc nc nc nc nc
Amwell GP - Ware / Thrift GP 0 6 nc 6 3 nc nc nc 0 nc 0 0
Amwell NR - others 34 23 129 121 69 142 148 247 4 4 5 19
Stanstead Abbotts Lakes - N lake 4 30 29 nc nc nc nc nc 13 36 4 0
Rye Meads 0 8 13 nc nc nc nc nc 0 2 3 0
Broxbourne GP 14 17 nc nc nc nc nc nc nc nc nc nc
Cheshunt GPs:
Radwell Mill nc 6 4 5 8 0 0 0 0 0 0 0
Panshanger Park nc nc nc nc nc nc nc nc nc nc nc nc
Fairlands Valley Park 106 nc 2 46 67 nc nc nc nc 7 nc 56
Verulamium Park 61 43 22 25 29 29 100 106 129 38 11 46
Tyttenhanger GPs - all 21 8 49 14 Present 12 18 147 111 37 30 45
Aldenham Reservoir 57 116 45 23 nc 77 57 10 nc 3 37 3
Hilfield Park Reservoir 0 0 9 3 0 107 109 0 0 0 0 0
Tring Reservoirs 30 68 56 7 24 32 17 45 92 36 6 2

WigeonTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc 0 nc nc nc nc nc nc nc nc nc nc
Batchworth Lake 0 0 0 0 0 0 0 0 0 0 0 0
Stocker's and Bury Lakes 9 7 22 0 0 0 0 0 31 28 25 72
Maple Lodge NR 0 0 0 0 0 0 nc 0 0 0 0 nc
Lynsters Lake 7 0 0 0 0 0 nc nc 0 9 2 0
Pynesfield North/South Lakes 92 8 4 0 0 0 nc nc 0 0 2 16
Helicon Lake 4 0 0 0 0 0 nc 0 0 0 1 0
Troy Mill Lake 6 0 0 0 0 0 nc 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 nc 0 0 0
Stanborough Lakes North nc 0 nc nc nc nc nc nc nc nc nc 0
Stanborough Lakes South nc nc 0 nc nc nc nc nc nc nc nc 0
King's Meads 18 33 20 0 0 0 0 nc nc nc nc nc
Amwell GP - Ware / Thrift GP 0 0 nc 0 0 nc nc nc 0 nc 0 0
Amwell NR - others 5 1 3 1 0 1 1 1 9 29 6 17
Stanstead Abbotts Lakes - N lake 0 0 0 nc nc nc nc nc 0 0 0 0
Rye Meads 2 0 15 nc nc nc nc nc 9 26 0 0
Broxbourne GP 0 0 nc nc nc nc nc nc nc nc nc nc
Cheshunt GPs:
Radwell Mill nc 0 0 0 0 0 0 0 0 0 0 0
Panshanger Park nc nc nc nc nc nc nc nc nc nc nc nc
Fairlands Valley Park 0 nc 0 0 0 nc nc nc nc 0 nc 0
Verulamium Park 0 0 0 0 0 0 0 0 0 0 0 0
Tyttenhanger GPs - all 0 0 0 0 0 0 0 0 9 0 2 4
Aldenham Reservoir 0 0 0 0 nc 0 0 2 nc 66 4 104
Hilfield Park Reservoir 0 7 0 0 0 0 0 1 0 38 4 71
Tring Reservoirs 185 6 98 18 3 0 0 2 100 306 201 285

GadwallTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc 0 nc nc nc nc nc nc nc nc nc nc
Batchworth Lake 0 0 0 0 0 0 0 0 0 0 0 0
Stocker's and Bury Lakes 17 61 6 6 0 0 0 41 57 20 44 93
Maple Lodge NR 20 13 11 13 9 33 nc 4 0 0 0 nc
Lynsters Lake 32 0 12 4 0 0 nc nc 0 20 20 16
Pynesfield North/South Lakes 8 10 4 0 0 0 nc nc 1 0 12 20
Helicon Lake 32 12 0 0 0 0 nc 0 0 0 7 4
Troy Mill Lake 6 1 4 0 0 5 nc 4 0 0 0 0
Lea Valley:
East Hyde 16 36 18 8 3 0 0 0 0 0 0 0
Brocket Park 6 0 0 0 0 0 0 0 nc 0 0 0
Stanborough Lakes North nc 0 nc nc nc nc nc nc nc nc nc 0
Stanborough Lakes South nc nc 0 nc nc nc nc nc nc nc nc 0
King's Meads 31 64 60 60 20 32 2 nc nc nc nc nc
Amwell GP - Ware / Thrift GP 0 0 nc 0 5 nc nc nc 1 nc 0 0
Amwell NR - others 257 109 23 11 20 21 14 45 61 68 91 92
Stanstead Abbotts Lakes - N lake 101 39 28 nc nc nc nc nc 21 32 30 74
Rye Meads 136 203 177 nc nc nc nc nc 316 254 110 61
Broxbourne GP 48 17 nc nc nc nc nc nc nc nc nc nc
Cheshunt GPs:
Radwell Mill nc 0 0 18 0 0 0 0 14 15 14 45
Panshanger Park nc nc nc nc nc nc nc nc nc nc nc nc
Fairlands Valley Park 0 nc 0 0 0 nc nc nc nc 0 nc 0
Verulamium Park 20 27 0 0 1 1 0 0 23 9 3 8
Tyttenhanger GPs - all 0 2 4 4 Present 2 4 10 2 7 1 3
Aldenham Reservoir 3 0 6 1 nc 0 0 40 nc 27 100 113
Hilfield Park Reservoir 15 13 6 12 4 20 87 45 19 15 19 33
Tring Reservoirs 85 23 66 2 0 2 3 0 38 60 45 60

TealTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc 0 nc nc nc nc nc nc nc nc nc nc
Batchworth Lake 0 0 0 0 0 0 0 0 0 0 0 0
Stocker's and Bury Lakes 0 11 0 0 0 0 0 0 3 0 0 0
Maple Lodge NR 2 5 6 3 0 5 nc 3 2 4 2 nc
Lynsters Lake 4 0 0 0 0 0 nc nc 0 0 0 0
Pynesfield North/South Lakes 0 0 0 0 0 0 nc nc 0 0 0 0
Helicon Lake 0 0 0 0 0 0 nc 0 0 0 0 0
Troy Mill Lake 0 0 0 0 0 0 nc 0 0 0 0 0
Lea Valley:
East Hyde 14 10 4 1 0 0 0 0 0 0 0 1
Brocket Park 0 0 0 0 0 0 0 0 nc 0 0 0
Stanborough Lakes North nc 0 nc nc nc nc nc nc nc nc nc 0
Stanborough Lakes South nc nc 0 nc nc nc nc nc nc nc nc 0
King's Meads 2 26 23 4 0 1 2 nc nc nc nc nc
Amwell GP - Ware / Thrift GP 0 0 nc 0 0 nc nc nc 0 nc 0 0
Amwell NR - others 10 18 4 4 0 0 0 1 7 8 5 11
Stanstead Abbotts Lakes - N lake 2 2 6 nc nc nc nc nc 0 3 0 0
Rye Meads 136 157 167 nc nc nc nc nc 107 142 9 117
Broxbourne GP 0 0 nc nc nc nc nc nc nc nc nc nc
Cheshunt GPs:
Radwell Mill nc 0 0 0 0 0 0 0 0 0 0 0
Panshanger Park nc nc nc nc nc nc nc nc nc nc nc nc
Fairlands Valley Park 0 nc 0 0 0 nc nc nc nc 0 nc 0
Verulamium Park 0 0 0 0 0 0 0 0 0 0 0 0
Tyttenhanger GPs - all 2 10 33 4 0 0 0 18 4 21 13 4
Aldenham Reservoir 0 0 0 0 nc 0 0 0 nc 0 0 0
Hilfield Park Reservoir 0 0 0 0 0 0 2 4 0 0 0 0
Tring Reservoirs 171 28 101 4 0 0 0 6 0 752 232 331

MallardTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc 15 nc nc nc nc nc nc nc nc nc nc
Batchworth Lake 23 56 26 23 25 32 35 40 33 32 19 44
Stocker's and Bury Lakes 30 41 29 43 28 20 25 28 29 67 20 47
Maple Lodge NR 3 21 2 17 13 18 nc 13 14 22 7 nc
Lynsters Lake 21 2 5 5 4 0 nc nc 1 0 5 8
Pynesfield North/South Lakes 4 2 9 1 0 2 nc nc 4 5 11 7
Helicon Lake 4 2 3 0 3 0 nc 4 12 15 9 6
Troy Mill Lake 12 13 7 6 2 7 nc 2 3 7 0 20
Lea Valley:
East Hyde 42 30 20 12 12 6 12 12 14 20 12 22
Brocket Park 9 4 8 7 6 6 10 30 nc 12 9 33
Stanborough Lakes North nc 43 nc nc nc nc nc nc nc nc nc 67
Stanborough Lakes South nc nc 19 nc nc nc nc nc nc nc nc 26
King's Meads 10 15 16 20 20 75 51 nc nc nc nc nc
Amwell GP - Ware / Thrift GP 12 6 nc 2 0 nc nc nc 8 nc 4 20
Amwell NR - others 114 44 31 22 17 27 62 42 26 43 79 119
Stanstead Abbotts Lakes - N lake 31 38 21 nc nc nc nc nc 35 15 21 26
Rye Meads 65 57 64 nc nc nc nc nc 97 57 18 31
Broxbourne GP 4 14 nc nc nc nc nc nc nc nc nc nc
Cheshunt GPs:
Radwell Mill nc 39 41 14 17 64 91 57 39 52 67 58
Panshanger Park nc nc nc nc nc nc nc nc nc nc nc nc
Fairlands Valley Park 255 nc 8 86 109 nc nc nc nc 185 nc 117
Verulamium Park 61 164 120 124 97 123 103 180 180 181 158 164
Tyttenhanger GPs - all 72 26 19 25 Present 22 19 57 36 26 30 22
Aldenham Reservoir 58 41 28 24 nc 89 108 122 nc 106 40 77
Hilfield Park Reservoir 3 2 9 10 15 7 2 6 7 5 2 7
Tring Reservoirs 91 76 98 25 63 76 205 178 306 186 65 72

ShovelerTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc 0 nc nc nc nc nc nc nc nc nc nc
Batchworth Lake 0 2 0 0 0 0 0 0 0 0 0 0
Stocker's and Bury Lakes 19 57 22 2 0 0 0 0 7 12 12 31
Maple Lodge NR 0 0 0 0 1 4 nc 16 8 18 0 nc
Lynsters Lake 3 0 0 0 0 0 nc nc 0 0 1 0
Pynesfield North/South Lakes 8 0 0 0 0 0 nc nc 0 0 0 1
Helicon Lake 6 0 0 0 0 0 nc 0 0 0 0 2
Troy Mill Lake 0 0 0 0 0 0 nc 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 nc 0 0 0
Stanborough Lakes North nc 0 nc nc nc nc nc nc nc nc nc 0
Stanborough Lakes South nc nc 0 nc nc nc nc nc nc nc nc 0
King's Meads 15 15 29 16 2 1 0 nc nc nc nc nc
Amwell GP - Ware / Thrift GP 2 0 nc 0 0 nc nc nc 0 nc 1 0
Amwell NR - others 26 13 10 6 1 1 1 8 22 23 46 29
Stanstead Abbotts Lakes - N lake 5 4 2 nc nc nc nc nc 11 16 2 10
Rye Meads 81 44 35 nc nc nc nc nc 100 97 106 29
Broxbourne GP 0 0 nc nc nc nc nc nc nc nc nc nc
Cheshunt GPs:
Radwell Mill nc 0 0 0 0 0 0 0 0 0 0 0
Panshanger Park nc nc nc nc nc nc nc nc nc nc nc nc
Fairlands Valley Park 0 nc 0 0 0 nc nc nc nc 0 nc 0
Verulamium Park 4 4 2 0 0 0 0 0 0 0 7 0
Tyttenhanger GPs - all 10 12 23 5 0 0 0 0 0 2 13 5
Aldenham Reservoir 0 2 5 2 nc 0 0 1 nc 10 12 26
Hilfield Park Reservoir 4 0 35 0 0 0 0 3 14 7 8 32
Tring Reservoirs 64 58 68 27 0 0 18 22 151 153 69 89

PochardTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc 0 nc nc nc nc nc nc nc nc nc nc
Batchworth Lake 1 0 6 0 0 0 0 0 0 0 0 5
Stocker's and Bury Lakes 112 23 13 4 6 1 0 7 76 107 75 49
Maple Lodge NR 0 4 7 3 9 4 nc 4 0 2 0 nc
Lynsters Lake 9 0 15 1 1 0 nc nc 0 0 4 3
Pynesfield North/South Lakes 15 2 1 0 0 0 nc nc 0 0 0 4
Helicon Lake 1 0 1 0 0 0 nc 0 0 0 1 0
Troy Mill Lake 2 0 0 0 7 0 nc 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 nc 0 0 0
Stanborough Lakes North nc 0 nc nc nc nc nc nc nc nc nc 0
Stanborough Lakes South nc nc 0 nc nc nc nc nc nc nc nc 0
King's Meads 17 20 2 4 4 1 9 nc nc nc nc nc
Amwell GP - Ware / Thrift GP 12 13 nc 0 0 nc nc nc 4 nc 29 10
Amwell NR - others 45 64 14 5 10 2 12 24 36 28 33 38
Stanstead Abbotts Lakes - N lake 30 13 12 nc nc nc nc nc 3 7 5 8
Rye Meads 8 18 18 nc nc nc nc nc 2 1 6 7
Broxbourne GP 24 16 nc nc nc nc nc nc nc nc nc nc
Cheshunt GPs:
Radwell Mill nc 1 1 0 0 0 0 0 0 0 0 1
Panshanger Park nc nc nc nc nc nc nc nc nc nc nc nc
Fairlands Valley Park 0 nc 0 0 0 nc nc nc nc 0 nc 0
Verulamium Park 3 0 0 0 1 1 1 0 0 0 0 1
Tyttenhanger GPs - all 1 4 1 4 0 0 0 2 0 0 0 0
Aldenham Reservoir 86 45 13 5 nc 22 4 26 nc 6 8 8
Hilfield Park Reservoir 35 8 16 1 0 1 158 138 10 10 14 31
Tring Reservoirs 238 130 134 8 2 2 1 4 156 256 136 231

Tufted DuckTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc 33 nc nc nc nc nc nc nc nc nc nc
Batchworth Lake 14 18 15 13 0 0 0 1 16 2 7 10
Stocker's and Bury Lakes 187 137 81 53 41 36 43 56 58 95 317 199
Maple Lodge NR 7 27 36 17 11 10 nc 16 7 8 3 nc
Lynsters Lake 74 98 138 48 20 22 nc nc 53 24 31 45
Pynesfield North/South Lakes 42 52 31 18 3 18 nc nc 20 41 44 50
Helicon Lake 27 23 28 22 3 8 nc 1 4 3 13 20
Troy Mill Lake 36 8 32 22 4 9 nc 7 8 68 12 18
Lea Valley:
East Hyde 6 0 5 0 2 0 0 0 0 0 0 0
Brocket Park 24 15 17 7 14 8 9 1 nc 5 0 6
Stanborough Lakes North nc 0 nc nc nc nc nc nc nc nc nc 2
Stanborough Lakes South nc nc 0 nc nc nc nc nc nc nc nc 0
King's Meads 8 34 7 15 14 9 2 nc nc nc nc nc
Amwell GP - Ware / Thrift GP 49 43 nc 80 50 nc nc nc 33 nc 80 97
Amwell NR - others 88 67 49 55 58 25 47 93 78 44 114 107
Stanstead Abbotts Lakes - N lake 72 46 60 nc nc nc nc nc 41 76 83 50
Rye Meads 96 68 127 nc nc nc nc nc 193 124 164 77
Broxbourne GP 100 71 nc nc nc nc nc nc nc nc nc nc
Cheshunt GPs:
Radwell Mill nc 1 0 2 2 2 0 0 0 0 0 0
Panshanger Park nc nc nc nc nc nc nc nc nc nc nc nc
Fairlands Valley Park 1 nc 0 3 3 nc nc nc nc 1 nc 0
Verulamium Park 4 4 38 29 26 16 3 7 11 10 3 8
Tyttenhanger GPs - all 4 17 7 22 7 4 10 7 1 0 4 3
Aldenham Reservoir 38 21 34 60 nc 26 15 17 nc 34 8 38
Hilfield Park Reservoir 40 99 121 35 15 20 169 286 107 59 47 88
Tring Reservoirs 218 307 253 98 48 49 65 46 240 179 132 170

GoldeneyeTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc 0 nc nc nc nc nc nc nc nc nc nc
Batchworth Lake 0 0 0 0 0 0 0 0 0 0 0 0
Stocker's and Bury Lakes 13 14 0 4 0 0 0 0 0 0 1 3
Maple Lodge NR 0 0 0 0 0 0 nc 0 0 0 0 nc
Lynsters Lake 0 0 0 0 0 0 nc nc 0 0 0 0
Pynesfield North/South Lakes 0 2 0 0 0 0 nc nc 0 0 0 0
Helicon Lake 0 0 0 0 0 0 nc 0 0 0 0 0
Troy Mill Lake 0 0 0 0 2 0 nc 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 nc 0 0 0
Stanborough Lakes North nc 0 nc nc nc nc nc nc nc nc nc 0
Stanborough Lakes South nc nc 0 nc nc nc nc nc nc nc nc 0
King's Meads 0 0 0 0 0 0 0 nc nc nc nc nc
Amwell GP - Ware / Thrift GP 0 0 nc 0 0 nc nc nc 0 nc 0 0
Amwell NR - others 4 13 7 3 0 0 0 0 0 0 2 6
Stanstead Abbotts Lakes - N lake 0 0 0 nc nc nc nc nc 0 0 0 0
Rye Meads 0 0 0 nc nc nc nc nc 0 0 0 0
Broxbourne GP 0 0 nc nc nc nc nc nc nc nc nc nc
Cheshunt GPs:
Radwell Mill nc 0 0 0 0 0 0 0 0 0 0 0
Panshanger Park nc nc nc nc nc nc nc nc nc nc nc nc
Fairlands Valley Park 0 nc 0 0 0 nc nc nc nc 0 nc 0
Verulamium Park 0 0 0 0 0 0 0 0 0 0 0 0
Tyttenhanger GPs - all 0 0 0 0 0 0 0 0 0 0 0 0
Aldenham Reservoir 0 0 0 0 nc 0 0 0 nc 0 0 0
Hilfield Park Reservoir 0 2 2 0 0 0 0 0 0 0 0 0
Tring Reservoirs 4 6 2 0 0 0 0 0 0 0 1 1

Ruddy DuckTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc 0 nc nc nc nc nc nc nc nc nc nc
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 nc 0 0 0 0 nc
Lynsters Lake 0 0 0 0 0 0 nc nc 0 0 0 0
Pynesfield North/South Lakes 0 0 0 0 0 0 nc nc 0 0 0 0
Helicon Lake 0 0 0 0 0 0 nc 0 0 0 0 0
Troy Mill Lake 0 0 0 0 0 0 nc 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 nc 0 0 0
Stanborough Lakes North nc 0 nc nc nc nc nc nc nc nc nc 0
Stanborough Lakes South nc nc 0 nc nc nc nc nc nc nc nc 0
King's Meads 0 0 0 0 0 0 0 nc nc nc nc nc
Amwell GP - Ware / Thrift GP 0 0 nc 0 0 nc nc nc 0 nc 0 0
Amwell NR - others 0 0 0 0 0 0 0 0 0 0 0 0
Stanstead Abbotts Lakes - N lake 0 0 0 nc nc nc nc nc 0 0 0 0
Rye Meads 0 0 0 nc nc nc nc nc 0 0 0 0
Broxbourne GP 0 0 nc nc nc nc nc nc nc nc nc nc
Cheshunt GPs:
Radwell Mill nc 0 0 0 0 0 0 0 0 0 0 0
Panshanger Park nc nc nc nc nc nc nc nc nc nc nc nc
Fairlands Valley Park 0 nc 0 0 0 nc nc nc nc 0 nc 0
Verulamium Park 0 0 0 0 0 0 0 0 0 0 0 0
Tyttenhanger GPs - all 0 0 0 0 0 0 0 0 0 0 0 0
Aldenham Reservoir 0 0 0 0 nc 0 0 0 nc 0 0 0
Hilfield Park Reservoir 3 0 0 2 0 0 1 2 2 0 0 0
Tring Reservoirs 0 0 0 0 0 0 0 0 0 0 0 0

Little GrebeTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc 0 nc nc nc nc nc nc nc nc nc nc
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 1
Maple Lodge NR 3 6 5 6 6 5 nc 8 7 8 4 nc
Lynsters Lake 0 0 0 0 0 0 nc nc 0 0 0 0
Pynesfield North/South Lakes 0 0 0 0 0 0 nc nc 0 0 0 0
Helicon Lake 0 0 0 0 0 0 nc 0 0 0 0 0
Troy Mill Lake 0 0 0 0 0 0 nc 1 0 0 0 0
Lea Valley:
East Hyde 2 6 2 2 2 2 2 4 2 2 2 2
Brocket Park 5 5 4 0 0 1 2 2 nc 7 9 7
Stanborough Lakes North nc 0 nc nc nc nc nc nc nc nc nc 0
Stanborough Lakes South nc nc 0 nc nc nc nc nc nc nc nc 1
King's Meads 1 2 3 2 1 2 6 nc nc nc nc nc
Amwell GP - Ware / Thrift GP 0 0 nc 0 0 nc nc nc 1 nc 0 0
Amwell NR - others 2 0 0 2 0 0 0 1 3 2 0 1
Stanstead Abbotts Lakes - N lake 3 2 0 nc nc nc nc nc 0 2 0 1
Rye Meads 17 6 19 nc nc nc nc nc 63 25 23 19
Broxbourne GP 2 1 nc nc nc nc nc nc nc nc nc nc
Cheshunt GPs:
Radwell Mill nc 1 0 0 0 0 0 0 0 0 0 2
Panshanger Park nc nc nc nc nc nc nc nc nc nc nc nc
Fairlands Valley Park 0 nc 0 0 0 nc nc nc nc 0 nc 0
Verulamium Park 0 0 2 4 0 1 1 2 1 1 0 0
Tyttenhanger GPs - all 0 0 0 0 0 0 0 1 0 0 1 0
Aldenham Reservoir 0 0 0 0 nc 0 0 0 nc 0 0 0
Hilfield Park Reservoir 0 0 1 1 4 1 1 3 2 1 2 0
Tring Reservoirs 7 1 0 0 0 3 4 3 9 0 9 0

Great Crested GrebeTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc 12 nc nc nc nc nc nc nc nc nc nc
Batchworth Lake 10 8 6 4 7 6 4 4 6 4 13 11
Stocker's and Bury Lakes 8 5 6 7 9 10 15 21 25 31 7 4
Maple Lodge NR 0 0 1 1 2 1 nc 0 0 0 0 nc
Lynsters Lake 0 2 3 4 4 4 nc nc 7 4 4 4
Pynesfield North/South Lakes 3 5 4 4 4 3 nc nc 14 12 8 7
Helicon Lake 3 3 2 2 0 2 nc 1 2 1 3 2
Troy Mill Lake 2 2 3 5 4 11 nc 15 18 26 18 12
Lea Valley:
East Hyde 0 0 0 0 0 0 0 0 0 0 0 0
Brocket Park 1 1 2 2 2 4 1 2 nc 4 1 0
Stanborough Lakes North nc 0 nc nc nc nc nc nc nc nc nc 0
Stanborough Lakes South nc nc 5 nc nc nc nc nc nc nc nc 2
King's Meads 0 0 0 0 0 0 0 nc nc nc nc nc
Amwell GP - Ware / Thrift GP 2 2 nc 0 2 nc nc nc 10 nc 4 3
Amwell NR - others 2 0 0 2 3 2 8 10 8 10 5 10
Stanstead Abbotts Lakes - N lake 1 1 7 nc nc nc nc nc 7 8 6 2
Rye Meads 0 0 0 nc nc nc nc nc 2 0 0 0
Broxbourne GP 0 3 nc nc nc nc nc nc nc nc nc nc
Cheshunt GPs:
Radwell Mill nc 0 0 0 0 0 0 0 0 0 0 0
Panshanger Park nc nc nc nc nc nc nc nc nc nc nc nc
Fairlands Valley Park 1 nc 1 0 1 nc nc nc nc 0 nc 0
Verulamium Park 0 0 0 0 0 0 0 0 0 1 0 0
Tyttenhanger GPs - all 9 5 21 22 Present 13 10 11 18 20 25 18
Aldenham Reservoir 13 11 7 12 nc 19 15 10 nc 15 19 10
Hilfield Park Reservoir 6 9 13 18 23 14 44 77 85 50 29 7
Tring Reservoirs 22 26 24 8 14 16 17 15 21 28 0 26

CormorantTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc 0 nc nc nc nc nc nc nc nc nc nc
Batchworth Lake 1 0 0 0 0 0 2 1 0 2 2 0
Stocker's and Bury Lakes 15 13 12 8 5 5 7 7 3 13 21 28
Maple Lodge NR 0 0 0 0 0 0 nc 0 1 0 1 nc
Lynsters Lake 1 0 1 0 1 0 nc nc 0 0 0 0
Pynesfield North/South Lakes 1 1 0 0 0 0 nc nc 0 0 0 0
Helicon Lake 3 0 0 0 0 0 nc 1 1 0 1 0
Troy Mill Lake 3 2 5 2 2 3 nc 0 0 12 8 8
Lea Valley:
East Hyde 2 1 2 0 0 1 1 2 1 1 1 2
Brocket Park 9 8 3 2 3 3 3 8 nc 5 0 6
Stanborough Lakes North nc 2 nc nc nc nc nc nc nc nc nc 3
Stanborough Lakes South nc nc 3 nc nc nc nc nc nc nc nc 0
King's Meads 0 5 1 1 2 1 1 nc nc nc nc nc
Amwell GP - Ware / Thrift GP 0 4 nc 0 0 nc nc nc 0 nc 0 1
Amwell NR - others 22 32 15 19 41 21 16 5 9 19 6 30
Stanstead Abbotts Lakes - N lake 9 9 1 nc nc nc nc nc 4 3 7 4
Rye Meads 10 2 3 nc nc nc nc nc 15 15 6 1
Broxbourne GP 8 8 nc nc nc nc nc nc nc nc nc nc
Cheshunt GPs:
Radwell Mill nc 0 0 0 0 0 0 0 0 0 0 0
Panshanger Park nc nc nc nc nc nc nc nc nc nc nc nc
Fairlands Valley Park 3 nc 1 0 1 nc nc nc nc 5 nc 6
Verulamium Park 0 0 0 0 1 1 0 0 0 0 1 1
Tyttenhanger GPs - all 12 5 9 6 0 0 1 0 0 4 5 12
Aldenham Reservoir 10 0 0 6 nc 0 0 1 nc 7 0 5
Hilfield Park Reservoir 3 5 0 0 0 0 0 6 10 11 4 3
Tring Reservoirs 38 20 41 12 19 25 21 32 31 29 43 62

Grey HeronTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc 4 nc nc nc nc nc nc nc nc nc nc
Batchworth Lake 1 0 0 0 0 2 2 1 1 1 4 2
Stocker's and Bury Lakes 10 20 18 26 7 8 5 4 5 2 3 5
Maple Lodge NR 0 0 0 0 0 1 nc 0 2 0 0 nc
Lynsters Lake 1 0 1 0 0 0 nc nc 0 0 0 0
Pynesfield North/South Lakes 0 0 0 1 0 0 nc nc 0 0 1 2
Helicon Lake 0 0 0 0 0 0 nc 1 0 1 0 0
Troy Mill Lake 1 1 2 0 2 1 nc 1 2 3 0 4
Lea Valley:
East Hyde 3 2 2 2 2 2 0 2 2 2 2 4
Brocket Park 1 1 1 1 0 2 1 0 nc 0 1 0
Stanborough Lakes North nc 3 nc nc nc nc nc nc nc nc nc 2
Stanborough Lakes South nc nc 0 nc nc nc nc nc nc nc nc 1
King's Meads 0 1 1 1 1 1 1 nc nc nc nc nc
Amwell GP - Ware / Thrift GP 0 0 nc 1 0 nc nc nc 0 nc 2 0
Amwell NR - others 5 9 8 11 15 9 16 1 4 2 2 4
Stanstead Abbotts Lakes - N lake 1 1 0 nc nc nc nc nc 1 0 0 1
Rye Meads 2 2 2 nc nc nc nc nc 6 5 5 1
Broxbourne GP 1 4 nc nc nc nc nc nc nc nc nc nc
Cheshunt GPs:
Radwell Mill nc 0 0 1 0 0 0 0 1 1 1 1
Panshanger Park nc nc nc nc nc nc nc nc nc nc nc nc
Fairlands Valley Park 1 nc 0 0 0 nc nc nc nc 0 nc 0
Verulamium Park 7 7 18 10 7 7 5 1 0 2 5 1
Tyttenhanger GPs - all 3 2 5 4 Present 3 5 3 4 5 3 8
Aldenham Reservoir 7 1 2 0 nc 4 3 1 nc 4 2 5
Hilfield Park Reservoir 0 0 1 0 0 0 2 0 0 1 1 1
Tring Reservoirs 14 8 17 13 11 16 8 5 12 7 7 8

MoorhenTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc 14 nc nc nc nc nc nc nc nc nc nc
Batchworth Lake 8 8 7 4 4 4 3 3 12 6 8 7
Stocker's and Bury Lakes 13 12 11 4 1 4 3 8 10 11 13 11
Maple Lodge NR 7 10 6 6 7 5 nc 7 8 9 13 nc
Lynsters Lake 4 2 1 0 0 0 nc nc 0 2 1 1
Pynesfield North/South Lakes 0 7 0 2 1 0 nc nc 0 0 0 2
Helicon Lake 0 0 5 1 1 2 nc 2 2 2 4 3
Troy Mill Lake 4 2 1 0 1 1 nc 4 1 4 1 2
Lea Valley:
East Hyde 42 30 15 10 10 11 12 12 12 12 11 14
Brocket Park 11 13 15 11 4 6 4 6 nc 14 23 18
Stanborough Lakes North nc 7 nc nc nc nc nc nc nc nc nc 9
Stanborough Lakes South nc nc 5 nc nc nc nc nc nc nc nc 13
King's Meads 4 10 8 9 7 3 8 nc nc nc nc nc
Amwell GP - Ware / Thrift GP 0 0 nc 0 0 nc nc nc 0 nc 0 2
Amwell NR - others 18 5 6 11 2 8 12 30 18 27 7 17
Stanstead Abbotts Lakes - N lake 1 5 3 nc nc nc nc nc 9 12 6 5
Rye Meads 30 47 50 nc nc nc nc nc 106 91 51 49
Broxbourne GP 3 5 nc nc nc nc nc nc nc nc nc nc
Cheshunt GPs:
Radwell Mill nc 3 2 2 2 0 2 4 3 3 1 2
Panshanger Park nc nc nc nc nc nc nc nc nc nc nc nc
Fairlands Valley Park 48 nc 4 5 12 nc nc nc nc 19 nc 10
Verulamium Park 14 26 21 12 6 6 26 29 35 42 66 32
Tyttenhanger GPs - all 22 16 22 8 Present 2 13 20 24 27 15 18
Aldenham Reservoir 22 23 11 5 nc 2 6 9 nc 27 9 23
Hilfield Park Reservoir 2 4 2 4 1 2 2 4 10 4 1 3
Tring Reservoirs 16 10 6 2 2 4 12 24 63 50 23 31

CootTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc 33 nc nc nc nc nc nc nc nc nc nc
Batchworth Lake 20 24 14 22 23 31 31 37 35 29 27 31
Stocker's and Bury Lakes 229 176 88 49 22 37 34 152 322 299 339 492
Maple Lodge NR 35 22 32 20 15 19 nc 42 20 15 14 nc
Lynsters Lake 273 88 134 52 28 22 nc nc 203 153 293 268
Pynesfield North/South Lakes 66 93 84 38 41 25 nc nc 74 58 79 110
Helicon Lake 44 48 30 17 6 15 nc 77 85 80 91 104
Troy Mill Lake 395 47 107 55 57 111 nc 95 22 0 78 42
Lea Valley:
East Hyde 18 12 6 10 10 6 10 12 12 12 12 10
Brocket Park 49 28 27 20 28 40 41 76 nc 62 70 105
Stanborough Lakes North nc 16 nc nc nc nc nc nc nc nc nc 31
Stanborough Lakes South nc nc 0 nc nc nc nc nc nc nc nc 0
King's Meads 51 67 41 43 35 23 37 nc nc nc nc nc
Amwell GP - Ware / Thrift GP 50 52 nc 38 7 nc nc nc 38 nc 59 52
Amwell NR - others 391 321 201 115 68 109 256 387 488 489 269 390
Stanstead Abbotts Lakes - N lake 149 105 50 nc nc nc nc nc 100 100 96 123
Rye Meads 185 197 151 nc nc nc nc nc 624 453 425 138
Broxbourne GP 285 266 nc nc nc nc nc nc nc nc nc nc
Cheshunt GPs:
Radwell Mill nc 3 3 2 7 11 7 5 4 8 6 5
Panshanger Park nc nc nc nc nc nc nc nc nc nc nc nc
Fairlands Valley Park 24 nc 9 20 13 nc nc nc nc 19 nc 28
Verulamium Park 94 70 186 73 62 71 108 121 123 105 116 110
Tyttenhanger GPs - all 91 88 65 46 Present 27 43 55 63 53 87 63
Aldenham Reservoir 71 81 64 62 nc 97 128 150 nc 318 242 296
Hilfield Park Reservoir 50 32 30 75 47 130 241 143 115 165 194 234
Tring Reservoirs 556 226 578 122 517 222 458 360 576 760 287 0