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Portland Broadcroft (DBC)
The map shows you the route that this butterfly transect follows.
| County: | Dorset (England) |
| Gridref: | SY696720 |
| Year established: | 1992 |
| Number of sections: | 7 |
| Altitude (m): | Unknown |
| Length (m): | 1060 |
| Width (m): | 10 |
| Broad habitat: | Bare ground/weed communities of post industrial sites e.g. quarries/pits/road/rail/landfill sites |
Species list...
The following species have been recorded on this site:
| Species | Status | Colonised/extinct | Asynchronous | Mean count | ||
| Ringlet | Increasing | 10 | more | |||
| Dark Green Fritillary | ? | 0 | .060 | more | ||
| Brown Argus | ? | 0 | .86 | more | ||
| Green Hairstreak | ? | 1 | .0 | more | ||
| Holly Blue | ? | 0 | .65 | more | ||
| Small Heath | Stable | 43 | more | |||
| Clouded Yellow | Stable | 2 | .6 | more | ||
| Small Blue | Stable | 61 | more | |||
| Dingy Skipper | Stable | 8 | .1 | more | ||
| Grayling | Decreasing | 4 | .6 | more | ||
| Brimstone | ? | 0 | .050 | more | ||
| Small Copper | Stable | 1 | .1 | more | ||
| Adonis Blue | ? | 0 | .54 | more | ||
| Chalk-hill Blue | Stable | 2 | .5 | more | ||
| Meadow Brown | Stable | * | 400 | more | ||
| Gatekeeper / Hedge Brown | Increasing | * | 4 | .0 | more | |
| Marbled White | Stable | 180 | more | |||
| Peacock | Decreasing | 3 | .2 | more | ||
| Large Skipper | Decreasing | 13 | more | |||
| Speckled Wood | Stable | 8 | .4 | more | ||
| Wall Brown | Stable | 20 | more | |||
| Large White | Stable | 31 | more | |||
| Green-veined White | ? | 0 | .36 | more | ||
| Small White | Decreasing | 93 | more | |||
| Silver-studded Blue | Decreasing | 150 | more | |||
| Comma | ? | 0 | .15 | more | ||
| Common Blue | Stable | 160 | more | |||
| Lulworth Skipper | Increasing | * | 0 | .77 | more | |
| Small Skipper | Stable | * | 71 | more | ||
| Red Admiral | Stable | 19 | more | |||
| Painted Lady | Stable | 12 | more | |||
| Small/Essex Skipper | Stable | 53 | 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. Species are marked as 'asynchronous' when their trends on this site are markedly different from the national trend. Click on 'more' to see a plot of abundance through time for each species. See green question mark above for more details.
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