Local Wildlife Site

Accessible Sites of Importance for Nature Conservation

The Warren in Bromley
Borough: Bromley
Grade: Borough Grade I
Access: Free public access (all/most of site)
Area: 14.98 ha

Description

This site is a small area of ancient woodland and an associated area of acid grassland. Its name is believed to originate from a period in the 16th century when rabbits were kept for sale in the area. The Shuttle Riverway walk passes though the site.

Wildlife

The site contains an extensive mosaic of habitats and occurs on acid soils derived from Blackheath pebble beds and Thanet sands. The woodland canopy is mostly secondary oak with local dominance of birch and some beech, ash, sycamore and coppiced hornbeam and sweet chestnut. Rhododendron grows through much of the central part of the woodland and the remaining shrub layer is fairly dense, with hawthorn, elder, young sycamore and snowberry. Bracken, bramble and ivy form the main ground flora with nettle abundant in places. Dog's mercury, false-brome, field rose, and lords-and-ladies also grow here. In larger clearings, foxglove, bluebell, violets, barren strawberry, soft-shield fern, southern woodrush and prickly sedge can be found. The once large pond in the middle of the site is now comprised of a much smaller pond with little vegetation and an area of wet ground dominated by yellow iris and soft rush with smaller amounts of the London notable species cyperus sedge. The pond has supported a large population of great crested newts, with palmate newts, smooth newts, frogs and grass snakes also recorded here. Large red and azure damselflies breed in the pond. An unusual patch of grassland can be found in the north-east of the site and contains a good diversity of both acid and calcareous plants, including heath woodrush, yellow-wort, knotted and hare's-foot clovers , bird's-foot, blue fleabane (Erigeron acer), heath bedstraw, crosswort, harebell and tormentil. The site attracts a variety of birds that feed on the abundant insects here.

Facilities

Walking route
Purple hairstreak butterfly © Stephen Frank

Purple hairstreak butterfly © Stephen Frank

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More information on GiGL’s SINC dataset can be found here.

Additional information, including other site designations and species recorded onsite and nearby, can be provided in community and client data search reports. Request information here.