Butterfly Conservation - saving butterflies, moths and our environment
Butterfly Conservation
Hertfordshire & Middlesex Branch
Saving butterflies, moths and our environment

Hertfordshire & Middlesex Transects

Over 60 transects were walked in Hertfordshire and Middlesex in 2017

Transects are the main method of measuring how butterfly populations change with time. The technique is simple, involving walking the same set route every week in good weather throughout the summer months, and noting down the numbers of each species seen within about 5 metres. The method is described under BUTTERFLY TRANSECT MONITORING

Link sections on this page . . .

2014 Transect Recording Report (3.6mb)
2013 Transect Recording Report
2012 Transect Recording Report
2011 Transect Recording Report
2010 Transect Recording Report
Recording Information
Transect Recording

The transects walked in Hertfordshire and Middlesex since 2005 are listed here. Please note that some transects have not been walked continuously since 2005

Name Grid Ref Last walked
Abney ParkTQ3368682016
Aldbury N1SP9491382017
Aldbury NowersSP9521592017
Balls WoodTL3441062017
Bardon ClumpsTL3181552017
Batford SpringsTL1451502015
Beane HillTQ1998732017
Bedfont LakesTQ0807242013
Bencroft FieldTL3300622017
Bencroft WoodTL3350652015
Birklands MeadowTL1680532005
Bishops Stortford Southern Country ParkTL4731932017
Brent ReservoirTQ2138732012
Bricket Wood CommonTL1310092017
BronzefieldTQ0557152010
Broxbourne West RideTL3250702017
Bunkers ParkTL0790582010
Butterfly WorldTL1270432016
Camley Street Natural ParkTQ2998342017
Clifford Road AllotmentsTQ2609672005
Colney Heath CommonTL2030572009
Cranford Park SouthTQ1017792017
Dane Farm Field, KimptonTL1531732012
Danemead Nature ReserveTL3460792017
Danesbury ParkTL2301702017
Fir and Pond WoodsTL2770062015
Fryent Country ParkTQ1958762015
Gravel HillTL2161702017
Great AshbyTL2672692014
Gunnersbury TriangleTQ2017862017
Gutteridge WoodTQ0918432017
Halsey FieldTL0420882017
Hampstead HeathTQ2708632017
Harmondsworth MoorTQ0507752016
Harpenden CommonTL1371342017
Heartwood ForestTL1631092017
Heartwood Forest 2TL1711232017
Hedgeswood Common to Hoo WoodTL0311312017
Horsenden Hill EastTQ1628432017
Horsenden Hill WestTQ1638442017
Hounslow HeathTQ1217492013
Hunsdon MeadTL4161082009
KenwoodTQ2718742014
Kings LangleyTL0680392010
KnebworthTL2212082017
Knebworth WoodsTL2272272017
Lake Farm Country ParkTQ0908042017
Lakeside NRSP9221242015
Lee Valley TurnfordTL3680432017
Lemsford SpringsTL2231212017
London Zoo Car ParkTQ2838362017
London ZooTQ2818342017
Long DeansTL0730482005
Mardley HeathTL2481842017
Marshalls HeathTL1611492017
MillhoppersSP9001492017
Minet Country ParkTQ1098022017
Miswell LaneSP9141172017
Nicky LineTL1161402005
Northaw Great WoodTL2800402013
Northaw Great Wood BridlewayTL2850432013
Oughtonhead CommonTL1693032009
Panshanger Park - Arable field westTL2981292017
Panshanger Park - Lady Hughes WoodTL3001252017
Panshanger Park - Rifle ButtsTL2991222017
Parkland Walk SouthTQ2898792017
Patmore HeathTL4422572017
Perivale WoodTQ1598372017
Pinn MeadowTQ0948802015
Pishiobury ParkTL4801352005
Pryor's WoodTL2652652017
Railway FieldsTQ3178812017
Regents CanalTQ3638242012
Rothamsted FarmTL1211372010
Roughdown Common (Lower)TL0480552017
Roxbourne RoughTQ1208752017
Sherrardspark (Red Lion to Reddings)TL2241402016
Sherrardspark (Reddings) - 2010 routeTL2301352016
Sherrardspark (Sixways Mid Section)TL2301342016
Sherrardspark (Templewood Vale - Muddy Bottom to Pentley Park Entrance)TL2351422015
Sherrardspark (Templewood Vale - new)TL2351432017
Sherrardspark Wood - SeftonTL2281382016
Shrubhill CommonTL0360722017
Smallford LakeTL1940712009
St James Park/Green ParkTQ2957982017
StevenageTL2462342017
Stockers Lake 2012TQ0459352017
The WarrenTL2040532017
Therfield Heath (Base of Church Hill)TL3333952017
Therfield Heath (Church Hill)TL3333962017
Therfield Heath (Lankester Hill)TL3534042017
Therfield Heath (Rifle Range)TL3484012017
Therfield Heath (Top of Rifle Range)TL3493982017
Thorley WashTL4891812017
Tottenham Wildmarsh WestTQ3519052015
Totteridge FieldsTQ2229402017
Tower Hamlets Cemetery ParkTQ3668232017
Trent Park Country ParkTQ2859652017
Tring Park (9 sections)SP9271002016
Walpole ParkTQ1738022016
Ware ParkTL3471432017
Waterford Heath NorthTL3151522017
Waterford Heath SouthTL3171492017
Wingrave RoadSP9261272012
Wolf FieldsTQ1287862017
Wood Lane PirtonTQ1433122017


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