Leyburn Glebe

Site of Special Scientific Interest · 54.3025, -1.8468

Condition (Natural England)

Favourable (1)
UnitFeatureConditionArea (ha)Assessed
SE100896 Favourable 2.63 2024-10-28

Description

Description Leyburn Glebe is a traditionally managed sheep pasture set on a gentle south facing slope above the valley of the River Ure. The calcareous loam supports unimproved grassland characterised by the occurrence of common bent Agrostis capillaris, heath grass Danthonia decumbens and quaking grass Briza media. Eight other species of grass occur and there is a rich herb flora which includes abundant salad burnet Poterium sanguisorba and thyme Thymus praecox as well as a range of other species such as cowslip Primula veris and fairy flax Linum catharticum. Seven species of orchid are present, notably the green winged orchid Anacamptis morio and burnt tip orchid Neotinea ustulata. These latter are scarce in northern England and increasingly so nationally as a result of modern agricultural practice. The site is the only known example of its type in the Yorkshire Dales. Other Information 1. This is a new site. 2. The site is managed as a nature reserve by the Yorkshire Naturalists' Trust.

Species mentioned

English name
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Latin name
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IUCN / Red List Type Family
common bent Agrostis capillaris LC grass poaceae
quaking grass Briza media VU grass poaceae
heath grass Danthonia decumbens NT grass poaceae
green-winged orchid Anacamptis morio NT herb orchidaceae
fairy flax Linum catharticum LC herb linaceae
burnt orchid Neotinea ustulata EN herb orchidaceae
salad burnet Poterium sanguisorba VU herb rosaceae
cowslip Primula veris LC herb primulaceae
creeping thyme Thymus praecox Not listed in GB list herb lamiaceae

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
Straw belle
Aspitates gilvaria
Endangered Linum catharticum
Duke of Burgundy
Hamearis lucina
Endangered Primula veris
Mouse moth
Amphipyra tragopoginis
Vulnerable Poterium sanguisorba
Grizzled skipper
Pyrgus malvae
Vulnerable Poterium sanguisorba
Small heath
Coenonympha pamphilus
Near Threatened Agrostis spp.
Wall
Lasiommata megera
Near Threatened Agrostis 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.

Plant communities

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

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