Coombe Mill

Site of Special Scientific Interest · 50.8768, -4.5454

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Also within

Cornwall County Cornwall Scenic Area

Condition (Natural England)

Favourable (1)
UnitFeatureConditionArea (ha)Assessed
SS210116 — Favourable 0.47 2014-03-11

Climate exposure

This is about exposure to a nationwide pressure this habitat type carries — not a verdict on this site's own management.

Coastal

Coastal habitats are exposed to sea-level rise and storm erosion. Where hard sea defences sit behind them, there's nowhere landward to retreat to — a squeeze that keeps compressing the habitat no matter how well it's managed.

Habitats

Fast flowing river and stream, Mixed scrub, Montane scrub, Traditional orchard

Geology & landscape

Landscape processes: Coastal

Description

Coombe Mill SSSI Description This site is notified as a lesser horseshoe bat Rhinolophus hipposideros breeding roost and as a hibernaculum for the following bat species, lesser horseshoe Rhinolophus hipposideros, greater horseshoe Rhinolophus ferrumequinum, brown long-eared Plecotus auritus, pipistrelle Pipistrellus pipistrellus and Daubenton's Myotis daubentonii. General Description The site is located in Coombe Valley, a sheltered wooded river valley about 5 kilometres north of Bode on the north Cornwall coast. Coombe mill with associated outbuildings is of particular importance as a summer breeding site for lesser horseshoe bats. It is one of the nineteen largest lesser horseshoe bat breeding sites in England (two of which are in Cornwall). Brown long-eared Plecotus auritus, and pipistrelle Pipistrellus pipistrellus bats also use the mill as a breeding site. The mill also provides an important hibernation site for a number of bat species including lesser horseshoe Rhinolophus hipposideros, greater horseshoe Rhinolophus ferrumequinum, brown long-eared Plecotus auritus, pipistrelle Pipistrellus pipistrellus and Daubenton's Myotis daubentonii. In addition the mill is used by greater horseshoe bats Rhinolophus ferrumequinum as a pre-breeding roost, by Natterer's Myotis nattereri, Daubenton's Myotis daubentonii, and pipistrelle Pipistrellus pipistrellus as a post-breeding site and by greater horseshoe bats as a night roost during the breeding period. The nearby barn is used all through the year by several species of bat and provides a hibernation site for pipistrelle and brown long-eared bats. Lesser and greater horseshoe bats are two of Britain's rarest bat species. Both species of horseshoe bat are classified as Vulnerable in the draft European Red Data Book for Vertebrates. Although once widespread in Europe both species of horseshoe bat have undergone a severe decline in the northern part of their range. In England the population estimate for lesser horseshoe bat is 7,000 individuals and for greater horseshoe bat about 4,000. In recognition of their rarity and vulnerability both the lesser and greater horseshoe bat are protected under UK and European Union legislation, including Annex II of the European Community Habitats and Species Directive. Both of these species are listed as Priority Species in the UK Government endorsed national Biodiversity Action Plan. Bats have traditional summer and winter roosts to which they return year after year. It is therefore important to maintain both summer breeding and winter hibernation sites. The disused mill at Coombe is built on four levels. The connecting staircase and numerous other openings provides bats with easy flight paths between levels. The range of internal temperatures provided by the various levels ensures the availability of optimal bat roost sites all through the year. The mill interior also provides a safe and sheltered space where bats can exercise before emerging to feed and where young bats can practise flying. In addition to secure breeding and hibernation sites bats also require certain habitat features to facilitate their movements between roosting and foraging areas. The mature trees, woodland/scrub edges, hedges/banks, mill leats and old orchard, which surround the mill and barn, provide safe, sheltered access routes to the main foraging areas in the woodland and pastures of the valleys to the east and north of Coombe. Other Information: This is a new site. It lies within an Area of Outstanding Natural Beauty (AONB) and Heritage Coast. All British bat species are listed in Annex W of the EC Habitats Directive and protected under Schedule 5 of the Wildlife and Countryside Act 198 1 (as amended) and Schedule 2 of The Conservation (Natural Habitats and c.) Regulations, 1994 (Regulation 38). In addition, both lesser and greater horseshoe bats are listed I protected under the following legislation; Annex II and Annex W of the EC Habitats and Species Directive 1992, Appendix II of the Bonn Convention (and is included in the Convention's Agreement on the Conservation of Bats in Europe) and Appendix II of the Bern Convention (also Recommendation 36 on the Conservation of Underground Habitats and Recommendation 43 (1995) on threatened mammals in Europe). The draft European Red Data Book for Vertebrates classifies the lesser horseshoe and greater horseshoe bat as Vulnerable, they are also listed in the Red Data Book for Cornwall and the Isles of Scilly (1997) and the UK Biodiversity Steering Group Report (1995) Priority Species.

Species mentioned

English name
search for this in other sites		 Latin name
search with Google		 IUCN / Red List Type Family
Daubenton's bat Myotis daubentonii LC bat vespertillonidae
Natterer's bat Myotis nattereri LC bat vespertillonidae
common pipstrelle bat Pipistrellus pipistrellus LC bat vespertillonidae
brown long-eared bat Plecotus auritus LC bat vespertillonidae
greater horseshoe bat Rhinolophus ferrumequinum LC bat vespertillonidae
lesser horseshoe bat Rhinolophus hipposideros LC bat vespertillonidae

Plant communities

A9 — Fast flowing river and stream, Marginal and inundation, Pond ditch and canal, Sluggish river and stream

Potamogeton natans community

Schoenoplectus lacustris, Juncus bulbosus, Sparganium angustifolium, Sparganium erectum, Sparganium minimum, Alisma plantago-aquatica, Lobelia dortmanna, Equisetum fluviatile, Myriophyllum alterniflorum, Elodea canadensis, Lemna minor, Lemna trisulca, Nymphaea alba, Callitriche platycarpa, Callitriche stagnalis, Littorella uniflora, Potamogeton natans, Ranunculus trichophyllus, Glyceria fluitans, Chara subspinosa

A14 — Fast flowing river and stream

Myriophyllum alterniflorum community

Isolepis fluitans, Juncus bulbosus, Fontinalis antipyretica, Lobelia dortmanna, Equisetum fluviatile, Myriophyllum alterniflorum, Lemna minor, Callitriche stagnalis, Littorella uniflora, Potamogeton filiformis, Potamogeton gramineus, Potamogeton natans, Ranunculus peltatus, Chara spp., Nitella hyalina

A17 — Chalk river and stream, Fast flowing river and stream

Ranunculus penicillatus ssp. pseudofluitans community

Berula erecta, Nasturtium officinale, Elodea canadensis, Lemna minor, Callitriche stagnalis, Veronica beccabunga, Polygonum amphibium, Polygonum hydropiper, Potamogeton crispus, Potamogeton pectinatus, Ranunculus penicillatus ssp. pseudofluitans

A18 — Fast flowing river and stream

Ranunculus fluitans community

Fontinalis antipyretica, Fontinalis squamosa var. curnowii, Myriophyllum alterniflorum, Myriophyllum spicatum, Elodea canadensis, Mentha aquatica, Lemna gibba, Lemna minor, Potamogeton perfoliatus, Ranunculus fluitans, Glyceria fluitans, Phalaris arundinacea

MG5 — Lowland meadow and pasture, Traditional orchard

Cynosurus cristatus-Centaurea nigra grassland

Carex caryophyllea, Carex flacca, Carex panicea, Juncus articulatus, Juncus effusus, Juncus inflexus, Luzula campestris, Brachythecium rutabulum, Calliergonell cuspidatum, Kindbergia praelonga, Pseudoscleropodium purum, Rhytidiadelphus squarrosus, Conopodium majus, Heracleum sphondylium, Pimpinella saxifraga, Achillea millefolium, Bellis perennis, Centaurea nigra, Cirsium arvense, Crepis capillaris, Hypochaeris radicata, Jacobaea vulgaris, Leontodon hispidus, Leucanthemum vulgare, Scorzoneroides autumnalis, Taraxacum officianalis, Cardamine pratensis, Knautia arvensis, Succisa pratensis, Cerastium fontanum, Colchicum autumnale, Lathyrus pratensis, Lotus corniculatus, Trifolium dubium, Trifolium pratense, Trifolium repens, Vicia cracca, Rhinanthus minor, Plantago lanceolata, Plantago media, Veronica chamaedrys, Rumex acetosa, Primula veris, Primula vulgaris, Ranunculus acris, Ranunculus bulbosus, Ranunculus repens, Agrimonia eupatoria, Alchemilla glabra, Alchemilla vestita, Alchemilla xanthochlora, Filipendula ulmaria, Potentilla erecta, Potentilla reptans, Poterium sanguisorba, Galium verum, Silaum silaus, Agrostis capillaris, Agrostis stolonifera, Alopecurus pratensis, Anthoxanthum odoratum, Arrhenatherum elatius, Avenula pubescens, Briza media, Bromus hordeaceous, Cynosurus cristatus, Dactylis glomerata, Danthonia decumbens, Festuca ovina, Festuca rubra, Holcus lanatus, Koeleria macrantha, Lolium perenne, Phleum pratense, Poa pratensis, Poa trivialis, Schedonorus arundinaceus, Schedonorus pratensis, Trisetum flavescens, Ophioglossum vulgatum, Chara curta

MG6 — Coastal floodplain grazing marsh, Traditional orchard

Lolium perenne-Cynosurus cristatus grassland

Juncus effusus, Luzula campestris, Brachythecium rutabulum, Kindbergia praelonga, Rhytidiadelphus squarrosus, Pimpinella saxifraga, Achillea millefolium, Bellis perennis, Centaurea nigra, Cirsium arvense, Cirsium vulgare, Hypochaeris radicata, Scorzoneroides autumnalis, Taraxacum officianalis, Cardamine pratensis, Cerastium fontanum, Lathyrus pratensis, Medicago lupulina, Trifolium dubium, Trifolium pratense, Trifolium repens, Iris pseudacorus, Rhinanthus minor, Plantago lanceolata, Plantago major, Veronica chamaedrys, Rumex acetosa, Rumex obtusifolius, Primula vulgaris, Ranunculus acris, Ranunculus repens, Potentilla anserina, Potentilla reptans, Agrostis capillaris, Agrostis stolonifera, Alopecurus geniculatus, Alopecurus pratensis, Anthoxanthum odoratum, Arrhenatherum elatius, Bromus hordeaceous, Cynosurus cristatus, Dactylis glomerata, Deschampsia cespitosa, Festuca ovina, Festuca rubra, Holcus lanatus, Lolium perenne, Phleum pratense, Poa annua, Poa pratensis, Poa trivialis, Schedonorus pratensis, Trisetum flavescens

W20 — Montane scrub

Salix lapponum-Luzula sylvatica scrub

Salix arbuscula, Salix cinerea, Salix lapponum, Salix myrsinites, Salix phylicifolia, Salix reticulata, Empetrum nigrum, Calluna vulgaris, Salix lanata, Vaccinium myrtillus, Vaccinium uliginosum, Carex atrata, Carex bigelowii, Carex binervis, Carex flacca, Luzula multiflora, Luzula sylvatica, Huperzia selago, Selaginella selaginoides, Aulacomnium palustre, Mnium hornum, Philonotis fontana, Plagiomnium undulatum, Rhizomnium punctatum, Dicranum bonjeanii, Dicranum majus, Dicranum scoparium, Fissidens adianthoides, Racomitrium lanuginosum, Calliergonell cuspidatum, Ctenidium molluscum, Hylocomium splendens, Hypnum callichroum, Hypnum cupressiforme, Palustriella commutatum, Plagiothecium denticulatum, Plagiothecium undulatum, Pleurozium schreberi, Ptilium crista-castrensis, Rhytidiadelphus loreus, Rhytidiadelphus squarrosus, Rhytidiadelphus triquetrus, Sanionia uncinata, Scorpidium revolvens, Thuidium tamariscinum, Atrichum undulatum, Polytrichastrum alpinum, Sphagnum capillifolium, Sphagnum fallax, Sphagnum girgensohnii, Sphagnum palustre, Sphagnum russowii, Sphagnum squarrosum, Sphagnum subnitens, Sphagnum teres, Barbilophozia barbata, Chiloscyphus polyanthos, Diplophyllum albicans, Lophocolea bidentata, Plagiochila porelloides, Ptilidium ciliare, Scapania undulata, Cladonia squamosa, Peltigera canina, Angelica sylvestris, Caltha palustris, Hieraclium spp., Saussurea alpina, Solidago virgaurea, Campanula rotundifolia, Succisa pratensis, Valeriana officinalis, Rhodiola rosea, Vaccinium vitis-idaea, Thymus praecox, Epilobium anagallidifolium, Dactylorhiza viridis, Euphrasia officinalis, Rhinanthus minor, Oxalis acetosella, Oxyria digyna, Polygonum viviparum, Rumex acetosa, Anemone nemorosa, Ranunculus acris, Thalictrum alpinum, Alchemilla alpina, Alchemilla glabra, Filipendula ulmaria, Geum rivale, Galium boreale, Galium saxatile, Saxifraga aizoides, Saxifraga hypnoides, Saxifraga oppositifolia, Saxifraga stellaris, Viola riviniana, Agrostis canina, Agrostis capillaris, Anthoxanthum odoratum, Deschampsia cespitosa, Deschampsia flexuosa, Festuca ovina, Festuca rubra, Nardus stricta, Dryopteris dilatata, Phegopteris connectilis

W21 — Hedgerow scrub, Mixed scrub

Crataegus monogyna-Hedera helix scrub

Hedera helix, Salix cinerea, Acer pseudoplatanus, Ilex aquifolium, Betula pendula, Corylus avellana, Fagus sylvatica, Quercus robur, Fraxinus excelsior, Malus sylvestris, Sorbus aria, Taxus baccata, Ulmus glabra, Ulmus procera, Sambucus nigra, Viburnum lantana, Euonymus europaeus, Cornus sanguinea, Juniperus communis, Ligustrum vulgare, Clematis vitalba, Rhamnus cathartica, Crataegus laevigata, Crataegus monogyna, Prunus spinosa, Juncus effusus, Plagiomnium undulatum, Brachythecium rutabulum, Kindbergia praelonga, Rhynchostegium confertum, Tamus communis, Heracleum sphondylium, Torilis japonica, Arum maculatum, Arctium minus, Cirsium arvense, Lonicera periclymenum, Moehringia trinervia, Silene dioica, Stellaria graminea, Stellaria holostea, Stellaria media agg., Calystegia sepium, Mercurialis perennis, Geranium robertianum, Iris foetidissima, Glechoma hederacea, Lamium purpureum, Origanum vulgare, Stachys sylvatica, Teucrium scorodonia, Allium ursinum, Hyacinthoides non-scripta, Circaea lutetiana, Rumex sanguineus, Anemone nemorosa, Ranunculus repens, Fragaria vesca, Geum urbanum, Potentilla sterilis, Poterium sanguisorba, Rosa arvensis, Rosa canina, Rubia peregrina, Rubus fruticosus agg., Galium aparine, Urtica dioica, Viola riviniana, Anisantha sterilis, Arrhenatherum elatius, Brachypodium pinnatum, Brachypodium sylvaticum, Bromopsis erecta, Dactylis glomerata, Elytrigia repens, Holcus lanatus, Holcus mollis, Poa trivialis, Asplenium scolopendrium, Pteridium aquilinum, Dryopteris filix-mas

W22 — Hedgerow scrub, Mixed scrub

Prunus spinosa-Rubus fruticosus scrub

Hedera helix, Acer campestre, Corylus avellana, Ulex europaeus, Prunus spinosa, Plagiomnium undulatum, Brachythecium rutabulum, Eurhynchium striatum, Kindbergia praelonga, Thuidium tamariscinum, Atrichum undulatum, Lophocolea bidentata, Achillea millefolium, Cardamine flexuosa, Lonicera periclymenum, Moehringia trinervia, Silene dioica, Silene uniflora, Stellaria media agg., Mercurialis perennis, Geranium robertianum, Stachys sylvatica, Teucrium scorodonia, Hyacinthoides non-scripta, Oxalis acetosella, Digitalis purpurea, Plantago lanceolata, Veronica chamaedrys, Armeria maritima, Rumex acetosa, Filipendula ulmaria, Geum urbanum, Rosa canina, Rubus fruticosus agg., Rubus idaeus, Galium aparine, Urtica dioica, Viola riviniana, Agrostis capillaris, Brachypodium sylvaticum, Dactylis glomerata, Festuca rubra, Holcus lanatus, Holcus mollis, Poa trivialis, Asplenium scolopendrium, Pteridium aquilinum, Dryopteris borreri, Dryopteris filix-mas

W24 — Traditional orchard

Rubus fruticosus-Holcus lanatus underscrub

Hedera helix, Acer pseudoplatanus, Betula pubescens, Corylus avellana, Fagus sylvatica, Quercus robur, Fraxinus excelsior, Sambucus nigra, Ulex europaeus, Crataegus monogyna, Prunus spinosa, Solanum dulcamara, Brachythecium rutabulum, Hypnum cupressiforme, Kindbergia praelonga, Pseudoscleropodium purum, Anthriscus sylvestris, Chaerophyllum temulentum, Heracleum sphondylium, Arum maculatum, Achillea millefolium, Centaurea nigra, Cirsium arvense, Cirsium palustre, Cirsium vulgare, Hypochaeris radicata, Jacobaea vulgaris, Lapsana communis, Solidago virgaurea, Taraxacum officianalis, Alliaria petiolata, Cerastium fontanum, Silene dioica, Stellaria holostea, Equisetum arvense, Mercurialis perennis, Lathyrus pratensis, Lotus corniculatus, Trifolium repens, Vicia sativa, Vicia sepium, Geranium robertianum, Glechoma hederacea, Stachys sylvatica, Chamerion angustifolium, Epilobium hirsutum, Epilobium montanum, Digitalis purpurea, Veronica chamaedrys, Rumex sanguineus, Primula vulgaris, Ficaria verna, Ranunculus acris, Ranunculus repens, Filipendula ulmaria, Fragaria vesca, Geum urbanum, Potentilla sterilis, Rosa canina, Rubus fruticosus agg., Cruciata laevipes, Galium aparine, Urtica dioica, Viola riviniana, Agrostis capillaris, Agrostis stolonifera, Anisantha sterilis, Anthoxanthum odoratum, Arrhenatherum elatius, Brachypodium sylvaticum, Dactylis glomerata, Deschampsia cespitosa, Elytrigia repens, Festuca rubra, Holcus lanatus, Lolium perenne, Phalaris arundinacea, Phragmites australis, Poa pratensis, Poa trivialis, Trisetum flavescens, Dryopteris filix-mas