Hildersham Wood

Site of Special Scientific Interest · 52.0883, 0.2383

Condition (Natural England)

Unfavourable Recovering (1)
UnitFeatureConditionArea (ha)Assessed
TL534456 Unfavourable Recovering 7.67 2008-09-03

Geology & landscape

Rock Type: Glacial Till

Landscape processes: Glacial

Description

Area, 7.3 hectares 18.0 ac Description Hildersham Wood is an ancient woodland of ash maple type lying on the chalky Boulder Clay. Its ancient origin is reflected in the rich variety of woodland plants and associated communities which it supports. Such woodland habitat is now very localised in extent, both locally and in lowland England as a whole. In a Cambridgeshire context the wood is notable for a number of locally rare species. Although the wood is of the ash maple classification type these species do not dominate the tree canopy. Pendunculate oak Quercus robur forms the major canopy species, occurring as mature standards. The shrub layer is mainly of sparse hazel Corylus avellana coppice and hawthorn Crataegus monogyna. Ash Fraxinus excelsior occurs as occasional coppice throughout the wood and field maple Acer campestre is frequent as coppice and maiden trees. Typical shrubs include hawthorn Crataegus monogyna, blackthorn Prunus spinosa, guelder rose Viburnum opulus and a number of wild rose species Rosa sp. The ground flora is rich and variable. Dog’s mercury Mercurialis perennis and bluebell Hyacinthoides non-scripta are locally dominant but comparatively absent in other areas. Other species include early purple orchid Orchis mascula, remote sedge Carex remota, primrose Primula vulgaris and wood anemone Anemone nemorosa. Of additional note is the presence of a number of locally rare species such as broad leaved helleborine Epipactis helleborine, sweet woodruff Asperula odorata and oval and pale sedges Carex leporina and C. pallescens. A good number of ferns and mosses also occur reflecting the particular wetness of this woodland. The rides, which give additional diversity to the habitat, are generally wet and dominated by sedge species Carex spp. and other damp loving species such as meadowsweet Filipendula ulmaria.

Species mentioned

English name
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Latin name
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IUCN / Red List Type Family
wood anemone Anemone nemorosa LC herb ranunculaceae
sweet woodruff Asperula odorata Not listed in GB list herb rubiaceae
broad-leaved helleborine Epipactis helleborine DD herb orchidaceae
meadow sweet Filipendula ulmaria LC herb rosaceae
bluebell Hyacinthoides non-scripta LC herb liliaceae
dog's mercury Mercurialis perennis LC herb euphorbiaceae
early purple orchid Orchis mascula LC herb orchidaceae
primrose Primula vulgaris LC herb primulaceae
oval sedge Carex leporina LC sedge cyperaceae
remote sedge Carex remota LC sedge cyperaceae
hawthorn Crataegus monogyna LC shrub rosaceae
blackthorn Prunus spinosa LC shrub rosaceae
gelder rose Viburnum opulus LC shrub caprifoliaceae
field maple Acer campestre LC tree aceraceae
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
Figure of eight
Diloba caeruleocephala
Endangered Crataegus spp., Prunus spinosa, Prunus spp.
Maple pug
Eupithecia inturbata
Endangered Acer campestre
The lappet
Gastropacha quercifolia
Endangered Crataegus monogyna, Prunus spinosa, Prunus spp.
Duke of Burgundy
Hamearis lucina
Endangered Primula vulgaris
Scarce vapourer
Orgyia recens
Endangered Corylus avellana, Crataegus spp., Filipendula ulmaria, Prunus spinosa, Quercus spp.
Black hairstreak
Satyrium pruni
Endangered Prunus spinosa
Mouse moth
Amphipyra tragopoginis
Vulnerable Crataegus spp.
The sprawler
Asteroscopus sphinx
Vulnerable Corylus avellana, Crataegus spp., Fraxinus excelsior, Prunus spinosa, Prunus spp., Quercus spp.
Mottled umber
Erannis defoliaria
Vulnerable Acer campestre, Corylus avellana, Crataegus spp., Prunus spinosa, Quercus spp.
Satyr pug
Eupithecia satyrata
Vulnerable Filipendula ulmaria
The lackey
Malacosoma neustria
Vulnerable Corylus avellana, Crataegus monogyna, Prunus spinosa, Prunus spp., Quercus spp.
Pale brindled
Phigalia pilosaria
Vulnerable Corylus avellana, Crataegus monogyna, Fraxinus excelsior, Prunus spinosa, Quercus spp.
Brown hairstreak
Thecla betulae
Vulnerable Prunus spinosa
Early moth
Theria primaria
Vulnerable Crataegus monogyna, Prunus spinosa, Quercus spp.
Pale eggar
Trichiura crataegi
Vulnerable Corylus avellana, Crataegus monogyna, Prunus spinosa, Quercus spp.
Oak hook-tip
Watsonalla binaria
Vulnerable Quercus robur
Flounced chestnut
Agrochola helvola
Near Threatened Crataegus monogyna, Quercus spp.
Beaded chestnut
Agrochola lychnidis
Near Threatened Crataegus monogyna
Grey chi
Antitype chi
Near Threatened Crataegus monogyna
Garden tiger
Arctia caja
Near Threatened Prunus spinosa
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, Crataegus spp., Prunus spinosa, Prunus spp., Quercus spp.
September thorn
Ennomos erosaria
Near Threatened Quercus spp.
Dusky thorn
Ennomos fuscantaria
Near Threatened Fraxinus excelsior
Autumnal rustic
Eugnorisma glareosa
Near Threatened Hyacinthoides non-scripta
Grey pug
Eupithecia subfuscata
Near Threatened Crataegus monogyna, Prunus spinosa
Double dart
Graphiphora augur
Near Threatened Crataegus spp., Prunus spinosa, 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

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.