A view of broadcroft quarry showing limestone rocks and grass sward

Broadcroft quarry scrape. Photo: J. Davis

Broadcroft supports a stunning array of plants and insects and is an excellent example of how ‘brownfield’ land can be managed for nature conservation and is part of the Isle of Portland Site of Special Scientific Interest (SSSI).

Site management aims to provide more open grassland and short sward conditions. Innovative surface-scraping has been successfully employed to re-recreate the special conditions needed by the Silver-studded Blue and the black ants with which it is associated.

The stony, calcareous soil supports a herb-rich flora with local plants such as bee and pyramidal orchids, yellow vetchling, autumn gentian and ivy broomrape. Sparse vegetation conditions are ideal for such plants as well as the key butterflies and other insects. The scrub provides shelter and habitat for birds but readily invades the open areas.

The site can be rough underfoot, please take care. Please do not cross the fenceline and approach the edge of the working quarry.

There may be guided walks or conservation work you can join on this reserve, details will be on our Events page.

Habitat and features

7.3 hectares (18 acres) of infilled limestone quarry. The stony, calcareous soil supports a herb-rich flora.

What to see


Find the best Dorset sites for individual butterflies on our Species profile pages.


Portland Ribbon Wave, Four-spotted, Chalk Carpet, Beautiful Gothic, Valerian Pug

Other species

Whitethroat, Lesser Whitethroat, Meadow Pipit, Kestrel, Green Woodpecker, Roe deer

Photo gallery

TIP: Click thumbnails to view full-size images.


Leased by Butterfly Conservation from the quarry company that owns it since 1994.

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