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West Yatton Down

Here we provide all the information we have for each transect site.

For example, clicking on one of the section titles below will display the site description (shown automatically), as well as a list of the species recorded here, and their yearly counts. However, you can also chose to Show All the sections, or even Hide All, if you so wish.

Map of West Yatton Down

The map shows you the route that this butterfly transect follows.


County : England(Wiltshire)
Gridref : ST85307590
Year established : 1996
Number of sections : 15
Altitude (m) : 109
Length (m) : 3500
Width (m) : -1
Broad habitat : Dry semi/unimproved (flower rich) chalk/limestone grassland
The following species have been recorded on this site:
SpeciesStatusColonised / ExtinctMean Count 
Essex/Small SkipperStable 94.75 more
Small SkipperStable 41.32 more
Essex Skipper? 1.56 more
Large SkipperStable 64.58 more
Dingy SkipperStable 88.61 more
Grizzled Skipper? 0.50 more
Clouded YellowStable 4.35 more
BrimstoneStable 185.35 more
Large WhiteStable 141.61 more
Small WhiteStable 66.43 more
Green-veined WhiteStable 165.72 more
Orange-tipStable 46.32 more
Green HairstreakStable 31.85 more
Purple HairstreakDeclining 0.88 more
White-letter Hairstreak? 0.36 more
Small CopperStable 23.69 more
Small BlueStable 3.03 more
Brown ArgusStable 158.95 more
Common BlueStable 379.86 more
Chalk Hill BlueStable 230.34 more
Adonis BlueStable 9.04 more
Holly BlueStable 10.33 more
Red AdmiralDeclining 20.05 more
Painted LadyStable 4.56 more
Small TortoiseshellDeclining 53.91 more
PeacockStable 163.10 more
CommaIncreasing 46.05 more
Dark Green FritillaryStable 2.69 more
Silver-washed FritillaryStable 6.48 more
Marsh Fritillary? 0.68 more
Speckled WoodIncreasing 202.40 more
Wall? 0.41 more
Marbled WhiteStable 404.99 more
GatekeeperStable 190.11 more
Meadow BrownDeclining 1017.06 more
Small HeathStable 184.27 more
RingletIncreasing 339.17 more

This table shows the species that have been recorded on this site. Where sufficient data is available, trends in abundance are assessed and colonisation/extinction events are identified. Click on 'more' to see a plot of abundance through time for each species. See green question mark above for more details.


The UKBMS is run by  Butterfly Conservation (BC), the Centre for Ecology and Hydrology (CEH) and the British Trust for Ornithology (BTO), in partnership with the Joint Nature Conservation Committee (JNCC), and supported and steered by Forestry Commission (FC),  Natural England (NE), Natural Resources Wales (NRW), Northern Ireland Environment Agency (NIEA), and Scottish Natural Heritage (SNH). The UKBMS is indebted to all volunteers who contribute data to the scheme.