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 2016 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 2016 the counts were undertaken on the following Sundays; 17 Jan, 21 Feb, 13 Mar, 10 Apr, 8 May, 5 Jun, 24 Jul, 21 Aug, 18 Sep, 16 Oct, 13 Nov and 18 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 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:
Hampermill Lake nc nc nc nc nc nc nc nc nc nc 0 0
Batchworth Lake 0 2 2 2 2 2 2 0 5 0 0 0
Stocker's and Bury Lakes 27 20 0 30 18 15 15 19 10 15 17 35
Maple Lodge NR 0 2 2 2 2 2 2 2 2 0 0 0
Lynsters Lake 14 9 nc 5 3 0 4 4 13 21 nc 24
Pynesfield North/South Lakes 2 2 2 2 2 2 2 2 4 4 3 3
Helicon Lake 2 0 1 1 0 1 2 0 3 0 2 2
Troy Mill Lake 4 7 0 2 0 2 2 3 7 11 4 13
Lea Valley:
East Hyde 2 2 3 2 2 2 2 2 2 12 2 nc
Brocket Park 7 2 1 1 1 3 2 2 3 0 3 6
Stanborough Lakes North nc nc nc nc nc nc nc nc nc nc nc nc
Stanborough Lakes South nc nc nc nc nc nc nc nc nc nc nc nc
King's Meads nc nc nc nc nc nc nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP 7 0 0 nc nc nc nc nc nc 0 0 5
Amwell NR - others 8 8 4 7 2 5 4 nc nc 8 5 9
Stanstead Abbotts Lakes - N lake 4 4 0 5 3 2 6 11 19 2 4 5
Rye Meads 6 2 5 nc nc nc nc nc 24 36 19 7
Broxbourne GP nc nc nc nc nc nc nc nc nc 0 3 4
Cheshunt GPs:
Radwell Mill 4 7 5 9 7 7 2 9 7 11 11 11
Panshanger Park 13 2 2 1 2 nc nc nc 4 nc 6 10
Fairlands Valley Park nc nc 2 2 nc 2 4 4 4 2 2 2
Verulamium Park 13 11 9 nc 1 5 2 4 2 3 3 4
Tyttenhanger GPs - all 3 3 5 nc nc 6 2 3 4 6 2 4
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 2 0 0 3 1 4 2 5 5 5 7 11
Tring Reservoirs 8 2 6 8 19 15 47 52 nc 45 51 37

Canada GooseTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc nc nc nc nc nc nc nc nc nc 0 1
Batchworth Lake 13 27 23 27 22 4 9 17 0 15 0 5
Stocker's and Bury Lakes 207 61 91 33 35 93 109 28 8 2 11 13
Maple Lodge NR 0 0 2 2 2 0 0 0 0 0 0 0
Lynsters Lake 7 73 nc 3 7 0 30 9 15 21 nc 42
Pynesfield North/South Lakes 0 0 0 0 0 0 7 1 2 0 0 0
Helicon Lake 0 0 3 2 0 0 7 11 1 9 6 11
Troy Mill Lake 0 0 0 0 0 1 75 0 0 1 1 1
Lea Valley:
East Hyde 56 112 99 48 52 22 33 33 155 199 164 nc
Brocket Park 106 41 18 8 5 11 63 24 26 88 108 0
Stanborough Lakes North nc nc nc nc nc nc nc nc nc nc nc nc
Stanborough Lakes South nc nc nc nc nc nc nc nc nc nc nc nc
King's Meads nc nc nc nc nc nc nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP 4 16 8 nc nc nc nc nc nc 0 0 0
Amwell NR - others 4 29 48 135 70 46 44 nc nc 2 0 32
Stanstead Abbotts Lakes - N lake 31 32 28 26 22 20 16 52 2 13 2 0
Rye Meads 0 2 6 nc nc nc nc nc 0 7 18 6
Broxbourne GP nc nc nc nc nc nc nc nc nc 16 0 0
Cheshunt GPs:
Radwell Mill 0 14 18 13 9 14 3 25 51 13 0 1
Panshanger Park 17 47 51 47 50 nc nc nc 0 nc 6 2
Fairlands Valley Park nc nc 90 74 nc 208 181 35 142 82 9 11
Verulamium Park 48 55 23 nc 49 60 105 84 144 81 68 68
Tyttenhanger GPs - all 42 36 29 nc nc 11 26 187 137 32 66 102
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 0 0 11 7 0 59 99 169 3 0 0 0
Tring Reservoirs 20 25 18 34 36 65 59 145 nc 99 146 10

WigeonTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc nc nc nc nc nc nc nc nc nc 0 0
Batchworth Lake 0 0 0 0 0 0 0 0 0 0 0 0
Stocker's and Bury Lakes 71 8 53 0 0 0 0 4 11 99 89 127
Maple Lodge NR 0 0 0 0 0 0 0 0 0 0 0 0
Lynsters Lake 9 3 nc 0 0 0 0 0 0 11 nc 95
Pynesfield North/South Lakes 0 0 0 0 0 0 0 0 0 0 2 0
Helicon Lake 2 0 0 0 0 0 0 0 0 0 0 0
Troy Mill Lake 5 0 0 0 0 0 0 0 16 40 0 0
Lea Valley:
East Hyde 0 0 0 0 0 0 0 0 0 0 0 nc
Brocket Park 0 0 0 0 0 0 0 0 0 0 0 0
Stanborough Lakes North nc nc nc nc nc nc nc nc nc nc nc nc
Stanborough Lakes South nc nc nc nc nc nc nc nc nc nc nc nc
King's Meads nc nc nc nc nc nc nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP 0 0 0 nc nc nc nc nc nc 0 0 0
Amwell NR - others 0 0 39 0 0 0 0 nc nc 36 5 117
Stanstead Abbotts Lakes - N lake 0 0 0 0 0 0 0 1 0 22 2 0
Rye Meads 0 0 0 nc nc nc nc nc 7 9 0 0
Broxbourne GP nc nc nc nc nc nc nc nc nc 0 0 0
Cheshunt GPs:
Radwell Mill 0 0 0 0 0 0 0 0 0 0 1 0
Panshanger Park 0 1 1 0 0 nc nc nc 15 nc 1 0
Fairlands Valley Park nc nc 0 0 nc 0 0 0 2 0 0 0
Verulamium Park 0 0 0 nc 0 0 0 0 0 0 0 0
Tyttenhanger GPs - all 4 0 0 nc nc 0 0 0 0 4 4 0
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 8 0 0 0 0 0 0 0 8 28 2 10
Tring Reservoirs 239 120 110 1 0 0 0 0 nc 401 448 115

GadwallTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc nc nc nc nc nc nc nc nc nc 0 0
Batchworth Lake 0 0 0 0 0 0 0 0 0 0 0 0
Stocker's and Bury Lakes 34 6 2 1 1 0 22 26 19 63 78 86
Maple Lodge NR 0 0 5 12 7 11 27 3 1 0 0 0
Lynsters Lake 8 8 nc 0 0 0 8 0 9 4 nc 47
Pynesfield North/South Lakes 7 0 0 0 0 0 0 0 0 0 26 21
Helicon Lake 18 1 0 0 0 0 0 0 0 0 2 10
Troy Mill Lake 15 0 0 0 0 0 17 9 30 22 9 23
Lea Valley:
East Hyde 14 15 6 0 2 0 0 0 0 12 12 nc
Brocket Park 0 0 0 0 0 0 0 0 0 0 0 0
Stanborough Lakes North nc nc nc nc nc nc nc nc nc nc nc nc
Stanborough Lakes South nc nc nc nc nc nc nc nc nc nc nc nc
King's Meads nc nc nc nc nc nc nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP 0 0 0 nc nc nc nc nc nc 0 0 3
Amwell NR - others 48 41 22 8 12 33 52 nc nc 169 83 90
Stanstead Abbotts Lakes - N lake 81 27 21 12 17 0 41 82 52 74 78 40
Rye Meads 75 86 126 nc nc nc nc nc 429 270 103 53
Broxbourne GP nc nc nc nc nc nc nc nc nc 13 29 73
Cheshunt GPs:
Radwell Mill 3 0 12 4 1 0 0 0 13 6 20 6
Panshanger Park 172 66 35 16 10 nc nc nc 72 nc 99 145
Fairlands Valley Park nc nc 0 0 nc 0 0 0 0 0 0 0
Verulamium Park 0 0 4 nc 3 0 0 5 0 8 2 2
Tyttenhanger GPs - all 20 18 8 nc nc 0 0 26 22 11 7 14
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 18 3 14 17 0 8 55 15 9 44 63 73
Tring Reservoirs 45 44 33 17 11 6 19 25 nc 34 28 81

TealTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc nc nc nc nc nc nc nc nc nc 0 0
Batchworth Lake 0 0 0 0 0 0 0 0 0 0 0 0
Stocker's and Bury Lakes 0 0 7 0 0 0 0 0 0 2 0 0
Maple Lodge NR 4 10 3 2 0 0 2 31 35 33 22 15
Lynsters Lake 0 1 nc 0 0 0 0 0 0 0 nc 0
Pynesfield North/South Lakes 0 0 1 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:
East Hyde 4 6 0 0 0 0 0 0 0 0 0 nc
Brocket Park 0 0 0 0 0 0 0 0 0 0 0 0
Stanborough Lakes North nc nc nc nc nc nc nc nc nc nc nc nc
Stanborough Lakes South nc nc nc nc nc nc nc nc nc nc nc nc
King's Meads nc nc nc nc nc nc nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP 0 0 0 nc nc nc nc nc nc 0 0 0
Amwell NR - others 6 12 2 4 0 2 0 nc nc 21 14 16
Stanstead Abbotts Lakes - N lake 17 7 8 3 0 0 0 0 0 23 5 0
Rye Meads 85 89 47 nc nc nc nc nc 102 80 57 124
Broxbourne GP nc nc nc nc nc nc nc nc nc 0 0 0
Cheshunt GPs:
Radwell Mill 0 0 0 0 0 0 0 0 0 0 0 0
Panshanger Park 43 2 0 0 0 nc nc nc 2 nc 4 91
Fairlands Valley Park nc nc 0 0 nc 0 0 0 0 3 0 1
Verulamium Park 0 0 0 nc 0 0 0 0 0 0 0 0
Tyttenhanger GPs - all 9 27 0 nc nc 4 0 3 9 9 14 18
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 2 2 0 2 0 0 0 0 0 0 0 0
Tring Reservoirs 628 71 162 18 0 0 7 102 nc 732 412 345

MallardTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc nc nc nc nc nc nc nc nc nc 9 7
Batchworth Lake 20 38 31 16 17 19 36 27 12 8 19 19
Stocker's and Bury Lakes 48 49 39 29 23 35 47 30 16 35 48 42
Maple Lodge NR 19 25 21 13 14 16 11 30 43 12 13 14
Lynsters Lake 6 3 nc 11 2 2 0 0 1 13 nc 9
Pynesfield North/South Lakes 6 5 3 7 4 1 0 13 10 0 9 4
Helicon Lake 2 8 14 1 2 4 14 5 28 4 18 12
Troy Mill Lake 12 6 4 9 1 1 7 5 0 1 2 5
Lea Valley:
East Hyde 33 22 16 12 10 12 12 12 12 12 22 nc
Brocket Park 10 11 5 13 10 9 5 18 6 5 8 17
Stanborough Lakes North nc nc nc nc nc nc nc nc nc nc nc nc
Stanborough Lakes South nc nc nc nc nc nc nc nc nc nc nc nc
King's Meads nc nc nc nc nc nc nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP 21 11 6 nc nc nc nc nc nc 14 9 6
Amwell NR - others 43 29 9 38 30 10 46 nc nc 25 43 37
Stanstead Abbotts Lakes - N lake 43 44 19 18 26 12 34 36 27 19 16 10
Rye Meads 53 71 79 nc nc nc nc nc 116 38 59 83
Broxbourne GP nc nc nc nc nc nc nc nc nc 12 4 15
Cheshunt GPs:
Radwell Mill 57 28 43 30 10 59 29 70 45 54 81 55
Panshanger Park 192 106 80 44 55 nc nc nc 29 nc 51 150
Fairlands Valley Park nc nc 140 90 nc 89 200 260 259 199 208 159
Verulamium Park 108 56 48 nc 42 62 43 25 20 27 20 27
Tyttenhanger GPs - all 68 13 17 nc nc 19 33 36 61 63 118 110
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 23 3 6 9 7 17 7 5 8 9 0 12
Tring Reservoirs 161 54 69 70 97 138 314 252 nc 339 144 0

ShovelerTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc nc nc nc nc nc nc nc nc nc 0 0
Batchworth Lake 0 0 0 0 0 0 0 0 0 0 0 0
Stocker's and Bury Lakes 20 29 8 2 0 0 0 0 0 13 19 64
Maple Lodge NR 0 2 10 4 2 0 4 12 14 15 5 4
Lynsters Lake 0 3 nc 0 0 0 0 0 0 0 nc 0
Pynesfield North/South Lakes 0 2 0 0 0 0 0 0 0 0 0 2
Helicon Lake 2 0 0 0 0 0 0 0 0 0 0 0
Troy Mill Lake 2 0 0 0 0 2 0 0 7 0 6 2
Lea Valley:
East Hyde 0 0 0 0 0 0 0 0 0 0 0 nc
Brocket Park 0 0 0 0 0 0 0 0 0 0 0 0
Stanborough Lakes North nc nc nc nc nc nc nc nc nc nc nc nc
Stanborough Lakes South nc nc nc nc nc nc nc nc nc nc nc nc
King's Meads nc nc nc nc nc nc nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP 0 0 0 nc nc nc nc nc nc 0 4 3
Amwell NR - others 15 11 16 4 3 0 3 nc nc 33 21 32
Stanstead Abbotts Lakes - N lake 8 12 6 0 0 0 0 0 2 16 14 18
Rye Meads 66 45 93 nc nc nc nc nc 68 41 75 48
Broxbourne GP nc nc nc nc nc nc nc nc nc 0 0 0
Cheshunt GPs:
Radwell Mill 0 0 0 0 0 0 0 0 0 3 5 0
Panshanger Park 6 16 1 0 0 nc nc nc 0 nc 13 7
Fairlands Valley Park nc nc 0 0 nc 0 0 0 2 0 0 0
Verulamium Park 5 5 3 nc 0 0 0 0 1 1 0 4
Tyttenhanger GPs - all 6 14 12 nc nc 0 0 0 6 3 14 30
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 16 14 85 24 0 1 0 2 6 20 18 53
Tring Reservoirs 93 127 46 35 0 1 2 58 nc 233 126 123

PochardTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc nc nc nc nc nc nc nc nc nc 0 0
Batchworth Lake 5 2 2 0 0 0 0 0 0 0 2 2
Stocker's and Bury Lakes 65 13 22 6 12 1 11 22 24 37 26 39
Maple Lodge NR 0 4 15 17 13 0 7 2 8 0 0 1
Lynsters Lake 0 2 nc 1 0 0 0 0 0 15 nc 37
Pynesfield North/South Lakes 13 6 3 0 0 1 0 0 0 1 12 20
Helicon Lake 5 2 5 0 0 0 0 0 0 0 1 6
Troy Mill Lake 57 0 0 1 1 13 3 0 4 0 13 20
Lea Valley:
East Hyde 0 0 0 0 0 0 0 0 0 0 0 nc
Brocket Park 0 0 0 0 0 0 0 0 0 0 0 0
Stanborough Lakes North nc nc nc nc nc nc nc nc nc nc nc nc
Stanborough Lakes South nc nc nc nc nc nc nc nc nc nc nc nc
King's Meads nc nc nc nc nc nc nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP 4 3 9 nc nc nc nc nc nc 6 19 3
Amwell NR - others 41 11 3 3 3 5 4 nc nc 63 9 10
Stanstead Abbotts Lakes - N lake 12 11 3 7 1 1 5 3 0 14 15 7
Rye Meads 3 16 24 nc nc nc nc nc 1 3 4 1
Broxbourne GP nc nc nc nc nc nc nc nc nc 1 2 3
Cheshunt GPs:
Radwell Mill 1 1 1 0 0 0 0 0 0 0 0 0
Panshanger Park 18 13 8 1 0 nc nc nc 14 nc 11 5
Fairlands Valley Park nc nc 0 0 nc 2 0 0 0 0 0 0
Verulamium Park 3 7 7 nc 0 0 0 0 0 0 0 6
Tyttenhanger GPs - all 8 1 0 nc nc 1 1 1 6 6 10 14
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 27 12 9 0 0 3 134 49 10 36 13 22
Tring Reservoirs 188 61 21 3 1 1 9 23 nc 151 116 96

Tufted DuckTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc nc nc nc nc nc nc nc nc nc 16 21
Batchworth Lake 20 34 12 7 0 8 4 1 0 12 15 7
Stocker's and Bury Lakes 91 115 120 74 0 40 69 58 90 133 103 138
Maple Lodge NR 0 14 21 16 20 21 16 14 8 0 1 7
Lynsters Lake 26 82 nc 38 3 20 0 0 4 33 nc 50
Pynesfield North/South Lakes 49 36 29 15 4 27 9 4 24 25 51 39
Helicon Lake 34 40 20 12 10 7 2 5 8 10 17 22
Troy Mill Lake 107 1 27 21 15 23 32 0 40 34 130 95
Lea Valley:
East Hyde 0 0 0 0 2 2 0 0 0 0 0 nc
Brocket Park 11 10 5 8 23 21 18 11 4 7 0 1
Stanborough Lakes North nc nc nc nc nc nc nc nc nc nc nc nc
Stanborough Lakes South nc nc nc nc nc nc nc nc nc nc nc nc
King's Meads nc nc nc nc nc nc nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP 36 34 80 nc nc nc nc nc nc 53 51 39
Amwell NR - others 153 97 64 0 27 59 42 nc nc 92 84 82
Stanstead Abbotts Lakes - N lake 123 84 75 66 43 22 34 45 76 88 116 124
Rye Meads 49 79 97 nc nc nc nc nc 223 71 46 56
Broxbourne GP nc nc nc nc nc nc nc nc nc 84 54 121
Cheshunt GPs:
Radwell Mill 0 0 0 0 4 1 0 0 0 0 0 0
Panshanger Park 53 41 70 55 65 nc nc nc 46 nc 31 39
Fairlands Valley Park nc nc 0 0 nc 0 0 0 0 0 1 3
Verulamium Park 4 7 15 nc 20 18 1 3 0 2 0 6
Tyttenhanger GPs - all 30 0 29 nc nc 16 2 8 6 6 18 10
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 92 89 160 47 13 16 222 121 46 85 77 79
Tring Reservoirs 152 174 196 183 96 42 103 195 nc 207 249 176

GoldeneyeTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc nc nc nc nc nc nc nc nc nc 0 0
Batchworth Lake 0 0 0 0 0 0 0 0 0 0 0 0
Stocker's and Bury Lakes 13 2 1 1 1 1 1 0 1 0 2 11
Maple Lodge NR 0 0 0 0 0 0 0 0 0 0 0 0
Lynsters Lake 0 0 nc 0 0 0 0 0 0 0 nc 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 1 0 0 0 0 0 0 0 0 0 0 3
Lea Valley:
East Hyde 0 0 0 0 0 0 0 0 0 0 0 nc
Brocket Park 0 0 0 0 0 0 0 0 0 0 0 0
Stanborough Lakes North nc nc nc nc nc nc nc nc nc nc nc nc
Stanborough Lakes South nc nc nc nc nc nc nc nc nc nc nc nc
King's Meads nc nc nc nc nc nc nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP 0 0 0 nc nc nc nc nc nc 0 0 0
Amwell NR - others 8 4 7 0 0 0 0 nc nc 0 4 3
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 nc nc nc nc nc nc nc nc nc 0 0 0
Cheshunt GPs:
Radwell Mill 0 0 0 0 0 0 0 0 0 0 0 0
Panshanger Park 0 0 0 0 0 nc nc nc 0 nc 0 0
Fairlands Valley Park nc nc 0 0 nc 0 0 0 0 0 0 0
Verulamium Park 0 0 0 nc 0 0 0 0 0 0 0 0
Tyttenhanger GPs - all 0 0 0 nc nc 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 1 1 0 0 0 0 0 0 0 0 0
Tring Reservoirs 2 3 2 0 0 0 0 0 nc 0 4 2

Ruddy DuckTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc nc nc nc nc nc nc nc nc nc 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 nc 0 0 0 0 0 0 0 nc 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:
East Hyde 0 0 0 0 0 0 0 0 0 0 0 nc
Brocket Park 0 0 0 0 0 0 0 0 0 0 0 0
Stanborough Lakes North nc nc nc nc nc nc nc nc nc nc nc nc
Stanborough Lakes South nc nc nc nc nc nc nc nc nc nc nc nc
King's Meads nc nc nc nc nc nc nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP 0 0 0 nc nc nc nc nc nc 0 0 0
Amwell NR - others 0 0 0 0 0 0 0 nc nc 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 nc nc nc nc nc nc nc nc nc 0 0 0
Cheshunt GPs:
Radwell Mill 0 0 0 0 0 0 0 0 0 0 0 0
Panshanger Park 0 0 0 0 0 nc nc nc 0 nc 0 0
Fairlands Valley Park nc nc 0 0 nc 0 0 0 0 0 0 0
Verulamium Park 0 0 0 nc 0 0 0 0 0 0 0 0
Tyttenhanger GPs - all 0 0 0 nc nc 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 0 0 0 0
Tring Reservoirs 0 0 0 0 0 0 0 0 nc 0 0 0

Little GrebeTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc nc nc nc nc nc nc nc nc nc 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 1 0 0 0
Maple Lodge NR 2 2 5 9 6 11 7 8 10 10 5 5
Lynsters Lake 0 0 nc 0 0 0 0 0 0 0 nc 0
Pynesfield North/South Lakes 0 2 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 1 0 0 0
Lea Valley:
East Hyde 3 1 0 2 2 2 2 2 2 2 2 nc
Brocket Park 8 3 3 1 3 3 6 11 7 6 8 4
Stanborough Lakes North nc nc nc nc nc nc nc nc nc nc nc nc
Stanborough Lakes South nc nc nc nc nc nc nc nc nc nc nc nc
King's Meads nc nc nc nc nc nc nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP 0 0 0 nc nc nc nc nc nc 0 2 0
Amwell NR - others 0 0 2 0 0 0 0 nc nc 5 4 1
Stanstead Abbotts Lakes - N lake 2 0 3 1 1 0 1 3 2 3 9 3
Rye Meads 13 11 28 nc nc nc nc nc 48 25 20 4
Broxbourne GP nc nc nc nc nc nc nc nc nc 0 0 1
Cheshunt GPs:
Radwell Mill 0 0 2 0 0 0 0 0 0 0 0 1
Panshanger Park 20 19 17 9 15 nc nc nc 47 nc 28 22
Fairlands Valley Park nc nc 0 0 nc 0 0 0 0 0 0 0
Verulamium Park 0 0 0 nc 0 0 0 4 2 0 0 0
Tyttenhanger GPs - all 0 0 0 nc nc 0 0 0 0 0 0 0
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 2 0 2 5 1 2 4 1 1 2 1 1
Tring Reservoirs 12 6 6 4 2 0 0 5 nc 14 16 16

Great Crested GrebeTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc nc nc nc nc nc nc nc nc nc 24 18
Batchworth Lake 0 0 1 1 2 4 7 3 6 3 4 4
Stocker's and Bury Lakes 22 29 19 20 20 9 16 18 27 19 20 12
Maple Lodge NR 0 0 2 2 2 4 2 2 1 0 0 0
Lynsters Lake 8 9 nc 7 1 5 8 3 2 2 nc 8
Pynesfield North/South Lakes 6 1 3 5 5 7 4 6 5 2 5 4
Helicon Lake 4 2 1 2 2 2 4 2 3 4 1 0
Troy Mill Lake 4 2 6 4 12 9 7 9 11 16 23 25
Lea Valley:
East Hyde 0 0 0 0 0 0 0 0 0 0 0 nc
Brocket Park 1 0 0 1 2 2 3 1 2 1 1 0
Stanborough Lakes North nc nc nc nc nc nc nc nc nc nc nc nc
Stanborough Lakes South nc nc nc nc nc nc nc nc nc nc nc nc
King's Meads nc nc nc nc nc nc nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP 0 1 2 nc nc nc nc nc nc 7 6 6
Amwell NR - others 1 3 1 5 7 6 8 nc nc 7 2 3
Stanstead Abbotts Lakes - N lake 6 12 6 2 2 4 5 6 9 13 11 5
Rye Meads 0 0 0 nc nc nc nc nc 2 3 1 0
Broxbourne GP nc nc nc nc nc nc nc nc nc 17 8 7
Cheshunt GPs:
Radwell Mill 0 0 0 0 0 0 0 0 0 0 0 0
Panshanger Park Present 2 3 4 8 nc nc nc 3 nc 0 0
Fairlands Valley Park nc nc 6 8 nc 3 2 1 1 2 0 0
Verulamium Park 0 1 0 nc 0 0 0 0 1 0 0 0
Tyttenhanger GPs - all 24 20 25 nc nc 10 14 15 18 14 19 22
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 12 5 7 18 15 22 39 53 60 45 32 15
Tring Reservoirs 40 31 20 33 23 25 20 21 nc 29 26 26

CormorantTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc nc nc nc nc nc nc nc nc nc 0 0
Batchworth Lake 1 0 0 0 0 1 0 1 0 0 0 0
Stocker's and Bury Lakes 21 22 10 12 3 5 1 3 23 11 31 26
Maple Lodge NR 0 1 1 0 1 3 3 1 1 2 1 0
Lynsters Lake 1 2 nc 1 0 1 0 0 0 1 nc 2
Pynesfield North/South Lakes 0 2 0 0 0 0 1 0 0 1 0 0
Helicon Lake 2 2 0 1 1 0 0 1 0 0 2 3
Troy Mill Lake 11 2 1 1 0 0 1 9 5 11 15 21
Lea Valley:
East Hyde 3 2 1 3 3 2 2 0 2 3 2 nc
Brocket Park 9 2 0 1 3 1 7 3 6 8 4 4
Stanborough Lakes North nc nc nc nc nc nc nc nc nc nc nc nc
Stanborough Lakes South nc nc nc nc nc nc nc nc nc nc nc nc
King's Meads nc nc nc nc nc nc nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP 0 0 0 nc nc nc nc nc nc 1 0 0
Amwell NR - others 35 43 45 46 41 26 15 nc nc 42 26 30
Stanstead Abbotts Lakes - N lake 6 5 4 5 4 4 3 5 7 8 9 6
Rye Meads 5 0 0 nc nc nc nc nc 25 20 5 0
Broxbourne GP nc nc nc nc nc nc nc nc nc 4 4 6
Cheshunt GPs:
Radwell Mill 0 0 0 0 0 1 0 1 0 2 1 0
Panshanger Park 3 2 4 3 6 nc nc nc 3 nc 2 4
Fairlands Valley Park nc nc 3 1 nc 0 1 2 0 2 3 6
Verulamium Park 0 0 1 nc 0 0 0 0 4 6 2 27
Tyttenhanger GPs - all 19 39 9 nc nc 1 1 3 8 8 14 12
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 13 0 0 0 1 1 0 7 68 13 24 10
Tring Reservoirs 63 40 0 30 29 33 24 29 nc 41 51 0

Grey HeronTop of page

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

MoorhenTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc nc nc nc nc nc nc nc nc nc 26 28
Batchworth Lake 6 8 7 10 2 1 10 5 5 6 5 8
Stocker's and Bury Lakes 7 8 9 4 4 3 4 12 11 28 11 20
Maple Lodge NR 4 6 8 10 7 8 7 9 11 9 6 4
Lynsters Lake 0 0 nc 1 0 0 0 0 0 0 nc 1
Pynesfield North/South Lakes 3 3 3 1 3 0 0 2 2 7 12 6
Helicon Lake 2 7 8 3 7 0 2 4 2 1 3 4
Troy Mill Lake 4 3 3 3 1 5 3 2 6 2 2 3
Lea Valley:
East Hyde 30 17 15 12 10 12 9 11 14 12 11 nc
Brocket Park 16 0 23 8 10 7 20 16 22 23 26 31
Stanborough Lakes North nc nc nc nc nc nc nc nc nc nc nc nc
Stanborough Lakes South nc nc nc nc nc nc nc nc nc nc nc nc
King's Meads nc nc nc nc nc nc nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP 2 3 9 nc nc nc nc nc nc 6 6 2
Amwell NR - others 11 13 14 7 20 12 15 nc nc 15 24 9
Stanstead Abbotts Lakes - N lake 9 5 12 6 12 6 12 10 5 10 7 3
Rye Meads 51 93 63 nc nc nc nc nc 121 60 76 51
Broxbourne GP nc nc nc nc nc nc nc nc nc 11 5 8
Cheshunt GPs:
Radwell Mill 3 4 1 3 3 2 5 3 5 3 1 2
Panshanger Park 16 6 11 6 4 nc nc nc 7 nc 13 3
Fairlands Valley Park nc nc 22 17 nc 15 32 47 51 51 45 27
Verulamium Park 17 14 10 nc 8 13 16 16 21 29 13 25
Tyttenhanger GPs - all 19 27 19 nc nc 5 16 12 23 31 21 15
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 4 5 5 5 1 3 0 4 2 8 4 1
Tring Reservoirs 48 25 27 5 4 4 32 52 nc 86 68 53

CootTop of page

JanFebMarAprMayJunJulAugSepOctNovDec 
Colne Valley:
Hampermill Lake nc nc nc nc nc nc nc nc nc nc 13 14
Batchworth Lake 13 18 22 26 26 22 19 31 39 25 18 18
Stocker's and Bury Lakes 491 304 144 95 75 85 124 275 473 518 480 581
Maple Lodge NR 3 19 10 16 18 16 10 9 15 7 7 0
Lynsters Lake 145 170 nc 62 21 50 30 37 168 77 nc 190
Pynesfield North/South Lakes 61 70 66 45 36 37 44 59 67 69 60 92
Helicon Lake 80 62 37 29 25 10 28 45 70 71 95 83
Troy Mill Lake 317 170 139 112 60 62 130 269 294 264 122 380
Lea Valley:
East Hyde 15 17 22 17 12 10 15 14 19 22 12 nc
Brocket Park 115 83 67 49 38 51 89 81 97 80 92 110
Stanborough Lakes North nc nc nc nc nc nc nc nc nc nc nc nc
Stanborough Lakes South nc nc nc nc nc nc nc nc nc nc nc nc
King's Meads nc nc nc nc nc nc nc nc nc nc nc nc
Amwell GP - Ware / Thrift GP 22 11 24 nc nc nc nc nc nc 21 19 16
Amwell NR - others 285 144 85 92 74 95 232 nc nc 489 339 351
Stanstead Abbotts Lakes - N lake 171 89 89 47 51 64 78 88 155 236 181 211
Rye Meads 169 156 155 nc nc nc nc nc 667 497 527 137
Broxbourne GP nc nc nc nc nc nc nc nc nc 236 301 362
Cheshunt GPs:
Radwell Mill 4 2 2 2 2 1 0 3 3 2 2 4
Panshanger Park 180 160 121 102 Present nc nc nc 166 nc 158 182
Fairlands Valley Park nc nc 42 28 nc 28 45 56 52 42 38 50
Verulamium Park 80 90 83 nc 78 75 72 45 59 57 56 62
Tyttenhanger GPs - all 93 101 93 nc nc 38 48 43 37 60 70 90
Aldenham Reservoir nc nc nc nc nc nc nc nc nc nc nc nc
Hilfield Park Reservoir 25 45 66 69 58 75 150 169 115 163 208 166
Tring Reservoirs 462 224 258 202 152 205 622 656 nc 939 666 126