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 2015.

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 Reference) Last Walked

  • Abney Park (TQ336868) 2005
  • Aldbury Nowers (SP952159) 2014
  • Balls Wood (TL344106) 2015
  • Batford Springs (TL145150) 2015
  • Beane Hill (TQ199873) 2015
  • Bedfont Lakes (TQ080724) 2013
  • Bencroft Wood (TL335065) 2015
  • Birklands Meadow (TL168053) 2005
  • Bishops Stortford Southern Country Park (TL473193) 2015
  • Brent Reservoir (TQ213873) 2012
  • Bricket Wood Common (TL131009) 2015
  • Bronzefield (TQ055715) 2010
  • Broxbourne Wood (TL324072) 2015
  • Bunkers Park (TL079058) 2010
  • Butterfly World (TL1204) 2015
  • Camley Street Natural Park (TQ299834) 2010
  • Clifford Road Allotments (TQ260967) 2005
  • Colney Heath Common (TL203057) 2009
  • Cranford Park South (TQ101779) 2015
  • Dane Farm Field, Kimpton (TL153173) 2012
  • Danemead (TL346079) 2015
  • Danesbury Park (TL230170) 2015
  • Fir and Pond Woods (TL277006) 2015
  • Fryent Country Park (TQ195876) 2015
  • Great Ashby (TL267269) 2014
  • Gravel Hill (TL216170) 2015
  • Gunnersbury Triangle (TQ201786) 2015
  • Gutteridge Wood (TQ091843) 2010
  • Halsey Hill (TL042088) 2015
  • Hampstead Heath (TQ270863) 2015
  • Harpenden Common (TL137134) 2015
  • Heartwood Forest (TL163109) 2015
  • Heartwood Forest - Transect 2 (TL171123) 2015
  • Horsenden Hill East (TQ162843) 2015
  • Horsenden Hill West (TQ163844) 2015
  • Hounslow Heath (TQ121749) 2013
  • Hunsdon Mead (TL416108) 2009
  • Kenwood (TQ271874) 2014
  • Kings Langley (TL068039) 2010
  • Knebworth Park (TL221208) 2010
  • Lake Farm Country Park (TQ090804) 2015
  • Lakeside NR (SP922124) 2015
  • Lee Valley Turnford (TL368043) 2015
  • Lemsford Springs (TL223121) 2015
  • Long Deans (TL073048) 2005
  • London Zoo (TQ281834) 2015
  • Mardley Heath (TL248184) 2015
  • Marshalls Heath (TL161149) 2015
  • Millhoppers (SP900149) 2014
  • Miswell Lane (SP914117) 2015
  • Nicky Line (TL116140) 2005
  • Northaw Great Wood (TL280040) 2013
  • Northaw Great Wood Bridleway (TL285043) 2013
  • Oughtonhead Common (TL169303) 2009
  • Panshanger Park - Arable field west (TL298129) 2015
  • Panshanger Park - Chisel Shelf (TL294121) 2015
  • Panshanger Park - Lady Hughes Wood (300125) 2015
  • Panshanger Park - Rifle Butts (TL299122) 2015
  • Parkland Walk South (TQ289879) 2015
  • Patmore Heath (TL442257) 2015
  • Perivale Wood (TQ159837) 2015
  • Pinn Meadow (TQ094880) 2015
  • Pishiobury Park (TL480135) 2005
  • Pryor's Wood (TL265265) 2015
  • Railway Fields (TQ317881) 2015
  • Regents Canal (TQ363824) 2012
  • Rothamsted Farm (TL121137) 2010
  • Roughdown Common (Lower) (TL048055) 2015
  • Roxbourne Rough (TQ120875) 2005
  • Sherrardspark (Red Lion to Reddings)(TL224140) 2015
  • Sherrardspark (Reddings) - 2010 route (TL230135) 2015
  • Sherrardspark (Sixways Mid Section) (TL230134) 2015
  • Sherrardspark (Templewood Vale - Muddy Bottom to Pentley Park Entrance) (TL235142) 2015
  • Sherrardspark (Templewood Vale - new) (TL235143) 2015
  • Shrubhill Common (TL036072) 2015
  • Smallford Lake (TL194071) 2009
  • St James Park/Green Park (TQ295798) 2015
  • Stevenage (TL246234) 2015
  • Stockers Lake 2012 (TQ045935) 2015
  • The Warren (TL204053) 2015
  • Therfield Heath (Base of Church Hill) (TL333395) 2015
  • Therfield Heath (Church Hill) (TL333396) 2015
  • Therfield Heath (Lankester Hill) (TL353404) 2015
  • Therfield Heath (Rifle Range) (TL348401) 2015
  • Therfield Heath (Top of Rifle Range) (TL349398) 2015
  • Thorley Wash (TL489181) 2015
  • Tottenham Wildmarsh West (TQ351905) 2015
  • Totteridge Fields (TQ222940) 2015
  • Tower Hamlets Cemetery Park (TQ366823) 2015
  • Trent Park (TQ285965) (2005) 2015
  • Tring Park (9 sections) (SP927100) 2015
  • Walpole Park (TQ173802) 2015
  • Ware Park (TL347143) 2015
  • Waterford Heath North (TL315152154) 2015
  • Waterford Heath South (TL317149) 2015
  • Wingrave Road (SP926127) 2012
  • Wood Lane Pirton (TQ143312) 2015


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