Endangered Species Of The British Isles Mammals . Bottlenose dolphin Tursiops truncatus . European Hare Lepus europaeus . Hazel Dormouse Muscardinus avellanarius . European Otter Lutra lutra . Greater Horseshoe Bat Rhinolophus ferrumequinium . Harbour Porpoise Phocoena phocoena . Red Squirrel Sciurus vulgaris . Water Vole Arvicola terrestris Birds . Aquatic Warbler Acrocephalus paludicola (passage migrant through UK) . Capercaillie Tatrao urogallus . Corn Crake Crex crex - globally threatened . Eurasian Wryneck Jynx torquilla . Great Bittern Botarus stellaris . Grey Partridge Perdix perdix . Red-backed Shrike Lanius collurio . Skylark Alauda arvensis . Song Thrush Turdus philomelos Reptiles . Slow-worm Anguis fragilis . Sand lizard Lacerta agilis . Common or Viviparous lizard Zootoca vivipara . Northern or European adder Vipera berus . Grass snake Natrix natrix . Smooth snake Coronella austriaca Amphibians . Great crested newt Triturus cristatus . Natterjack toad Bufo calamita Fish . Allis Shad Alosa alosa . Pollan Coregonus autumnalis pollan . Twaite Shad Alosa fallax . Vendace Coregonus vandesius . Gwyniad Coregonus pennantii Insects Ants . Black-backed Meadow Ant Formica pratensis (possibly extinct) . Black Bog Ant Formica candida . Narrow-headed Ant Formica exsecta Bees . Shrill Carder Bee Bombus sylvarum Beetles . Beaulieu Dung Beetle Aphodius niger . Blue Ground Beetle Carabus intricatus . Bembidion argenteolum . Crucifix Ground Beetle Panagaeus crux-major . Hazel Pot Beetle Cryptocephalus coryli . Lizard Weevil Cathormiocerus britannicus (probably endemic) . Orbera oculata . Pashford Pot Beetle Cryptocephalus exiguus (probably endemic and extinct) . Stag Beetle Lucanus cervus . Stenus palposus . Tachys edmonsi (endemic) . Violet Click Beetle Limoniscus violaceus Butterflies and moths . Bright Wave Idaea ochrata . Brown Hairstreak Thecla betulae . Chequered Skipper Carterosephalus palaemon . Dingy Skipper Erynnis tages . Duke Of urgundy Hamearis lucina . Flounced Chestnut Agonum scitulum . Glanville Fritillary Melitaea cinxia . Grayling Hipparchia semele . Greenweed Flat-body Moth Agonopterix atomella . Grey Dagger Acronicta psi . Grizzled Skipper Pyrgus malvae . Heath Fritillary Mellicta athalia . High Brown Fritillary Argynnis adippe . Knot Grass Aconicta rumicis . Large Blue Maculinea arion (endemic subspecies extinct, re-established from Swedish stock) . Large Copper Lycaena dispar (endemic subspecies extinct, as are earlier re-establishments) . Large Heath Coenonympha tullia . Lulworth Skipper Thymelicus acteon . Marsh Fritillary Eurodryas aurinia . Mountain Ringlet Erebia epiphron . Netted Carpet Moth Eustroma reticulata . Northern Brown Argus Aricia artaxerxes . Pearl-bordered Fritillary Boloria euphrosyne . Reddish Buff Acosmetia caliginosa . Silver-spotted Skipper Hesperia comma . Silver-studded Blue Plebejus argus . Small Blue Cupido minimus . Small Heath Coenonympha pamphilus . Small Pearl-bordered Fritillary Boloria selene . Speckled footman Coscinia cribraria . Wall Lasiommata megera . White Admiral Limenitis camilla . White-letter Hairstreak Satyrium w-album . Wood White Leptidea sinapis Crickets . European Mole Cricket Gryllotalpa gryllotalpa Damselflies . Southern Damselfly Coenagrion mercuriale Flies . Callicera spinolae (a hoverfly) . Golden Hoverfly Chrysotoxum octomaculatum . Hornet Robberfly Asilus crabroniformis . Manx Robber fly Machimus cowini (endemic) Grasshoppers . Large Marsh Grasshopper Stethophyma grossum Crustaceans . White clawed crayfish Austropotamobius pallipes Molluscs Gastropods Freshwater snails: . Glutinous Snail Myxas glutinosa . Little Whirlpool Ram's-horn Snail Anisus vorticulus . Shining Ram's-horn Snail Segmentina nitida Land snails: . Narrow-mouthed Whorl Snail Vertigo angustior . Round-mouthed Whorl Snail Vertigo genesii . Geyer's Whorl Snail Vertigo geyeri . Desmoulin's Whorl Snail Vertigo moulinsiana . Sandbowl Snail Catinella arenaria Bivalves . Depressed River Mussel Pseudanodonta complanata . Freshwater Pearl Mussel Margaritifera margaritifera . Fine-lined Pea Mussel Pisidium tenuilineatum Other invertebrates Freshwater: . Medicinal Leech Hirudo medicinalis Marine: . Ivell's Sea Anemone (endemic and probably extinct) . Starlet Sea Anemone Nematostella vectensis Plants Flowering plants . Creeping Marshwort Apium repens . Early Gentian Gentianella anglica (endemic) . Eyebrights Euphrasia sp. (endemic) . Fen Orchid Liparis loeselii . Floating Water-plantain Luronium natans . Holly-leaved Naiad Najas marina . Isle of Man Cabbage Coincya monensis (endemic) . Lady's Slipper Orchid Cypripedium calceolus . Lundy Cabbage Coincya wrightii (endemic) . Mountain Scurvy-grass Cochlearia micacea (probably endemic) . Norwegian Mugwort Artemisia norvegica . Ribbon-leaved Water Plantain Alisma gramineum . Shetland pondweed Potamogeton rutilus . Shore Dock Rumex rupestris . Slender Naiad Najas flexilis . Star Fruit Damasonium alisma . Three-lobed Crowfoot Ranunculus tripartitus . Western Ramping-fumitory Fumaria occidentalis (endemic) . Wild Cotoneaster Cotoneaster cambricus (probably endemic) . Yellow Marsh Saxifrage Saxifraga hirculus . Young's Helleborine Orchid Epipactis youngiana (endemic) Ferns . Killarney Fern Trichomanes speciosum . Newman's Lady Fern Athyrium flexile (probably endemic) Fungi . Devil's bolete Boletus satanus . Sandy stilt puffball Battarraea phalloides . Tulostoma niveum Lichens . Elm's Gyalecta Gyalecta ulmi . Orange-fruited Elm-lichen Caloplaca luteoalba . Pseudocyphellaria aurata . Pseudocyphellaria novegica . River Jelly Lichen Collema dishotomum . Schismatomma graphidioides . Starry Breck-lichen Buellia asterella . morchella Mosses . Cornish Path-moss Ditrichum cornubicum (endemic) . Derbyshire Feather-moss Thamnobryum angustifolium (endemic) . Glaucous Beard-moss Didymodon glaucus . Green Shield Moss Buxbaumia viridis . Slender Green Feather-moss Hamatocaulis vernicosus . Weissia multicapsularis Liverworts . A Lejeunea mandonii . Marsh Earwort Jamesoniella undulifolia . Norfolk Flapwort Lophozia rutheana . Petalwort Petalophyllum ralfsii . Western Rustwort Marsupella profunda Stoneworts . Mossy Stonewort Chara muscosa (probably extinct) .