Mapping Challenge 2005 - 2009 ~ TQ07

Butterfly Conservation
Hertfordshire and Middlesex Decad (10km square) Mapping Progress 2005 - 2009

TQ07

Click on image for detailed map

TQ07~ Click on image for detailed map

Decad co-ordinator: VACANT

Link sections on this page . . .
Table One ~ Key Tetrads to be visited
Table Two ~ Species richness map
Table Three ~ Target species

Table One ~ Key tetrads to be visited
Table One lists tetrads that have either had no visits or where coverage is poor. Please try to visit these in 2009. If you can help please contact or

This is a very complicated area for county boundaries and several 2km squares are in or shared with the Surrey and Upper Thames Branches. Please send all Berkshire or Buckinghamshire records to
the Upper Thames Branch and Surrey records to Surrey Branch

Tetrad (2km square) Centered on Coverage 2005 - 2008
TQ0270 Staines All season visits required
TQ0470 Staines (Knowle Green) Very well covered
TQ0472 Stanwell/Reservoirs All season visits required
TQ0474 Stanwell Place/Reservoirs Relatively well covered now
TQ0476 Longford Relatively well covered now
TQ0478 West Drayton (west)/River Colne Relatively well covered now
TQ0670 Ashford All season visits required
TQ0672 Bedfont Lakes CP (ex transect route) All season visits required
TQ0674 Heathrow Airport (Terminal 4) All season visits required
TQ0676 Heathrow Airport (northside) All season visits required
TQ0678 West Drayton All season visits required
TQ0870 Ashford Common All season visits required
TQ0872 Feltham Very well covered
TQ0874 Hatton Well covered now
TQ0876 Harlington Well covered now
TQ0878 Hayes Town Well covered now

Table Two ~ Species Richness Grid
Table Two is a 5 x 5 grid of the tetrads (2km squares) in TQ08, and shows the species richness for each tetrad based on recording in 2005, 2006, 2007 and 2008. There are no transects in TQ07, although for several years a transect was walked at Bedfont Lakes. Only Vice-county of Middlesex 2km squares are shown.
This list will be updated during 2009 to avoid duplication of effort. Please check before visiting a target

1 = a species
Special richness grid for TQ07

Table Three ~ Target Species
Table Three indicates the distribution of species recorded in TQ07 and the 2km squares that need to be visited for specific species.
This list will be updated during 2009 to avoid duplication of effort. Please check before visiting a target
1 = a record
Species 0070 0072 0074 0076 0078 0270 0272 0274 0276 0278 0470 0472 0474 0476 0478 0670 0672 0674 0676 0678 0870 0872 0874 0876 0878 Total
Brimstone 1 1 1 1 1 1 1 1 1 1 10
Brown Argus 1 1
Clouded Yellow 1 1
Comma 1 1 1 1 1 1 1 1 8
Common Blue 1 1 1 1 1 1 1 7
Essex Skipper 1 1 1 1 1 1 6
Gatekeeper 1 1 1 1 1 1 1 1 1 1 1 1 1 13
Green-veined White 1 1 1 1 1 1 1 1 1 1 1 1 12
Holly Blue 1 1 1 1 1 1 1 1 1 1 1 1 1 1 14
Large Skipper 1 1 1
Large White 1 1 1 1 1 1 1 1 1 1 1 1 1 13
Marbled White 0
Meadow Brown 1 1 1 1 1 1 1 1 1 1 1 1 12
Orange Tip 1 1 1 1 1 1 1 1 1 1 1 11
Painted Lady
1 1 2
Peacock 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 15
Purple Emperor 0
Purple Hairstreak 0
Red Admiral 1 1 1 1 1 1 6
Ringlet 1 1
Silver-washed Fritillary 0
Small Copper 1 1 1 1 4
Small Heath 1 1 1 1 4
Small Skipper 1 1 1 1 1 1 6
Small Tortoiseshell 1 1 1 1 1 1 6
Small White 1 1 1 1 1 1 1 1 8
Small/Essex Skipper -
Speckled Wood 1 1 1 1 1 1 1 1 1 1 1 1 1 1 14
White Admiral 0
White-letter Hairstreak 0
Total 2 13 11 17 3 11 12 12 3 8 8 5 6 6 19 13 15 12
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