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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: | |
| Altitude (m): | Unknown |
| Length (m): | 1060 |
| Width (m): | Unknown |
| 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 | ||
| Small Tortoiseshell | Stable | 8 | .9 | more | ||
| Ringlet | Increasing | 10 | more | |||
| Dark Green Fritillary | ? | 0 | .070 | more | ||
| Brown Argus | ? | 0 | .96 | more | ||
| Holly Blue | ? | 0 | .45 | more | ||
| Small Heath | Stable | 43 | more | |||
| Clouded Yellow | Stable | 2 | .7 | more | ||
| Small Blue | Stable | 61 | more | |||
| Dingy Skipper | Stable | 7 | .4 | more | ||
| Grayling | Decreasing | 5 | .4 | more | ||
| Brimstone | ? | 0 | .060 | more | ||
| Small Copper | Stable | 1 | .1 | more | ||
| Adonis Blue | ? | 0 | .59 | more | ||
| Chalk-hill Blue | Stable | 2 | .1 | more | ||
| Meadow Brown | Stable | 390 | more | |||
| Gatekeeper/Hedge Brown | Increasing | 3 | .0 | more | ||
| Marbled White | Stable | 180 | more | |||
| Peacock | Decreasing | 3 | .5 | more | ||
| Large Skipper | Decreasing | 14 | more | |||
| Speckled Wood | Stable | 7 | .7 | more | ||
| Wall Brown | Stable | 22 | more | |||
| Large White | Stable | 31 | more | |||
| Green-veined White | ? | 0 | .28 | more | ||
| Small White | Stable | 96 | more | |||
| Silver-studded Blue | Decreasing | 170 | more | |||
| Comma | ? | 0 | .16 | more | ||
| Common Blue | Increasing | * | 170 | more | ||
| Lulworth Skipper | ? | 0 | .47 | more | ||
| Small Skipper | Stable | * | 70 | more | ||
| Red Admiral | Stable | 20 | more | |||
| Painted Lady | Stable | 13 | 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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