Balsham Wood

Site of Special Scientific Interest · 52.1222, 0.3193

Also within

Cambridgeshire County

Condition (Natural England)

Unfavourable Recovering (2)
UnitFeatureConditionArea (ha)Assessed
TL588496 Unfavourable Recovering 30.99 2011-12-09
TL590495 Unfavourable Recovering 3.97 2011-12-09

Geology & landscape

Rock Type: Glacial Till

Landscape processes: Glacial

Description

Area, 34.6 hectares 85.7 ac Description Balsham Wood holds woodland community types of ancient origin and of a type geographically restricted to lowland England. The woodland represents one of the few remaining areas of ancient ash maple woodland on the chalky Boulder Clay and contains a rich assemblage of plants including a population of oxlip Primula elatior, a species which is restricted to a few sites in eastern England. The woodland is dominated by coppice of ash Fraxinus excelsior and field maple Acer campestre with hazel Corylus avellana. Mature oak Quercus robur standards are present in parts of the wood. Of particular note is the presence of coppiced hornbeam Carpinus betulus which occurs here at the edge of its geographic range in Britain. A good variety of shrubs are present, including dogwood Cornus sanguinea and wild privet Ligustrum vulgare. The ground flora is typically rich and of the dog’s mercury Mercurialis perennis bluebell Hyacinthoides non-scripta type together with such species as herb paris Paris quadrifolia, early purple orchid Orchis mascula and, of special note, sweet woodruff Galium odoratum, orpine Sedum telephium and wood sanicle Sanicula europaea. This is one of very few Cambridgeshire woods where primrose Primula vulgaris occurs on the same site as oxlip. Where open grassy rides occur additional habitat variety is provided and herbs such as bugle Ajuga reptans and wood sedge Carex sylvatica occur.

Species mentioned

English name
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Latin name
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IUCN / Red List Type Family
bugle Ajuga reptans LC herb lamiaceae
woodruff Galium odoratum LC herb rubiaceae
bluebell Hyacinthoides non-scripta LC herb liliaceae
dog's mercury Mercurialis perennis LC herb euphorbiaceae
early purple orchid Orchis mascula LC herb orchidaceae
herb paris Paris quadrifolia VU herb melanthiaceae
oxlip Primula elatior LC herb primulaceae
primrose Primula vulgaris LC herb primulaceae
sanicle Sanicula europaea LC herb apiaceae
orpine Sedum telephium Not listed in GB list herb crassulaceae
wood sedge Carex sylvatica LC sedge cyperaceae
dogwood Cornus sanguinea LC shrub cornaceae
wild privet Ligustrum vulgare LC shrub oleaceae
field maple Acer campestre LC tree aceraceae
hornbeam Carpinus betulus LC tree betulaceae
hazel Corylus avellana LC tree corylaceae
ash Fraxinus excelsior LC tree oleaceae
common oak Quercus robur LC tree fagaceae

Insects to look out for

These moths, butterflies and beetles are known to feed on plants recorded at this site, and carry a notable UK conservation status — but a host-plant being present doesn't mean the insect has actually been recorded here. Treat this as "worth watching for," not a confirmed sighting.

SpeciesStatusVia host-plant
Oak lutestring
Cymatophorina diluta
Endangered Quercus robur
Maple pug
Eupithecia inturbata
Endangered Acer campestre
Duke of Burgundy
Hamearis lucina
Endangered Primula vulgaris
Scarce vapourer
Orgyia recens
Endangered Corylus avellana, Quercus spp.
The sprawler
Asteroscopus sphinx
Vulnerable Corylus avellana, Fraxinus excelsior, Quercus spp.
Mottled umber
Erannis defoliaria
Vulnerable Acer campestre, Carpinus betulus, Corylus avellana, Quercus spp.
Satyr pug
Eupithecia satyrata
Vulnerable Galium spp.
Bedstraw hawk-moth
Hyles gallii
Vulnerable Galium spp.
The lackey
Malacosoma neustria
Vulnerable Corylus avellana, Quercus spp.
Pale brindled
Phigalia pilosaria
Vulnerable Cornus sanguinea, Corylus avellana, Fraxinus excelsior, Quercus spp.
Early moth
Theria primaria
Vulnerable Quercus spp.
Pale eggar
Trichiura crataegi
Vulnerable Corylus avellana, Quercus spp.
Oak hook-tip
Watsonalla binaria
Vulnerable Quercus robur
Flounced chestnut
Agrochola helvola
Near Threatened Quercus spp.
Light crimson underwing
Catocala promissa
Near Threatened Quercus robur
Dark crimson underwing
Catocala sponsa
Near Threatened Quercus robur
Heart moth
Dicycla oo
Near Threatened Quercus robur
Large thorn
Ennomos autumnaria
Near Threatened Corylus avellana, Quercus spp.
September thorn
Ennomos erosaria
Near Threatened Quercus spp.
Dusky thorn
Ennomos fuscantaria
Near Threatened Fraxinus excelsior
Autumnal rustic
Eugnorisma glareosa
Near Threatened Galium spp., Hyacinthoides non-scripta
Double dart
Graphiphora augur
Near Threatened Quercus spp.
Clay fan-foot
Paracolax tristalis
Near Threatened Quercus spp.
Common fan-foot
Pechipogo strigilata
Near Threatened Quercus robur
Frosted green
Polyploca ridens
Near Threatened Quercus robur
Dark-barred twin-spot carpet
Xanthorhoe ferrugata
Near Threatened Galium spp.

Host-plant data: Cook et al. (2025), Traits data for the butterflies and macro-moths of Great Britain and Ireland, 2024, UK Centre for Ecology & Hydrology / Butterfly Conservation; and Padovani et al. (2020), Database of Insects and their Food Plants (DBIF), UK Centre for Ecology & Hydrology (both Open Government Licence). Contains data supplied by UK Centre for Ecology & Hydrology.