BRERC Record Summary
Species Recorded
Taxon Scientific Name Common Name Records Latest
alder fly, lacewing or snake fly Osmylus fulvicephalus a stream lacewing 5 2014
ant, bee, wasp, sawfly or ichneumon (and others) Odynerus melanocephalus Black Headed Mason Wasp 3 2000
ant, bee, wasp, sawfly or ichneumon (and others) Oedemopsis scabricula an ichneumon wasp 2 2003
ant, bee, wasp, sawfly or ichneumon (and others) Oiorhinus pallipalpis an ichneumon wasp 3 2002
ant, bee, wasp, sawfly or ichneumon (and others) Opheltes glaucopterus an insect - hymenopteran 1 2018
ant, bee, wasp, sawfly or ichneumon (and others) Ophion an Ophion sp. (unidentified) 1 2017
ant, bee, wasp, sawfly or ichneumon (and others) Ophion luteus agg. (pre Johansson (2019)) an ichneumon wasp 10 2016
ant, bee, wasp, sawfly or ichneumon (and others) Ophion minutus an ichneumon wasp 1 2008
ant, bee, wasp, sawfly or ichneumon (and others) Ophion obscuratus agg. (pre Johansson (2019)) an ichneumon wasp 5 2020
ant, bee, wasp, sawfly or ichneumon (and others) Ophion slaviceki an ichneumon wasp 1 2022
ant, bee, wasp, sawfly or ichneumon (and others) Opius pallipes a braconid wasp 1 2008
ant, bee, wasp, sawfly or ichneumon (and others) Ormyrus nitidulus a chalcid wasp 1 2021
ant, bee, wasp, sawfly or ichneumon (and others) Orthopelma mediator an ichneumon wasp 15 2003
ant, bee, wasp, sawfly or ichneumon (and others) Osmia a mason bee (unidentified) 3 2021
ant, bee, wasp, sawfly or ichneumon (and others) Osmia aurulenta Gold-fringed Mason Bee 4 2019
ant, bee, wasp, sawfly or ichneumon (and others) Osmia bicolor Two Coloured Mason Bee 16 2019
ant, bee, wasp, sawfly or ichneumon (and others) Osmia bicornis Red Mason Bee 88 2021
ant, bee, wasp, sawfly or ichneumon (and others) Osmia caerulescens Blue Mason Bee 21 2021
ant, bee, wasp, sawfly or ichneumon (and others) Osmia leaiana a solitary bee 9 2021
ant, bee, wasp, sawfly or ichneumon (and others) Osmia spinulosa Spined Mason Bee 10 2020
ant, bee, wasp, sawfly or ichneumon (and others) Oxybelus uniglumis Common Spiny Digger Wasp 3 2000
beetle Ocalea picata a rove beetle 1 2021
beetle Ochina ptinoides Ivy Boring Beetle 23 2021
beetle Ochthebius dilatatus a small water beetle 20 2019
beetle Ochthebius marinus a small water beetle 4 2002
beetle Ochthebius minimus a small water beetle 19 2016
beetle Ochthebius nanus a Beetle 1 2000
beetle Ochthebius viridis a Beetle 1 2009
beetle Ochthephilum an Ochthephilum sp. (unidentified) 1 2016
beetle Ochthephilum collare a rove beetle 1 2019
beetle Ochthephilum fracticorne a rove beetle 1 2019
beetle Octotemnus glabriculus a small fungus beetle 9 2021
beetle Ocypus aeneocephalus a Beetle 2 2019
beetle Ocypus fortunatarum a rove beetle 1 1978
beetle Ocypus olens Devil's Coach-horse 106 2022
beetle Ocys harpaloides / tachysoides (agg.) a ground beetle 29 2021
beetle Ocys quinquestriatus a ground beetle 1 2002
beetle Odeles marginata a marsh beetle 2 1978
beetle Oedemera an Oedemera sp. (unidentified) 4 2021
beetle Oedemera femoralis a thick-legged flower beetle 50 2022
beetle Oedemera lurida a thick-legged flower beetle 226 2021
beetle Oedemera nobilis Swollen-thighed Beetle 644 2022
beetle Olibrus aeneus a smut beetle 2 2001
beetle Olibrus affinis a smut beetle 7 2021
beetle Olibrus liquidus a smut beetle 4 2019
beetle Olisthopus rotundatus a ground beetle 2 1998
beetle Olophrum piceum a rove beetle 12 2021
beetle Omalium caesum a rove beetle 10 2021
beetle Omalium excavatum a rove beetle 1 2021
beetle Omalium italicum a rove beetle 27 2021
beetle Omalium laeviusculum a rove beetle 11 2021
beetle Omalium riparium a rove beetle 1 2019
beetle Omalium rivulare a rove beetle 21 2021
beetle Omalium rugatum a rove beetle 2 2016
beetle Omalium rugulipenne a rove beetle 1 2021
beetle Omaloplia ruricola a dung beetle or chafer 4 2017
beetle Omonadus floralis an antlike beetle 9 2021
beetle Omosita colon a pollen or sap beetle 11 2003
beetle Omosita discoidea a pollen or sap beetle 2 1981
beetle Omphalapion hookerorum a seed weevil 5 2001
beetle Ontholestes murinus a rove beetle 7 2019
beetle Ontholestes tessellatus a rove beetle 4 2021
beetle Onthophagus coenobita a dung beetle or chafer 8 2020
beetle Onthophagus joannae a dung beetle or chafer 9 2020
beetle Onthophagus medius a dung beetle or chafer 4 1997
beetle Onthophagus similis a dung beetle or chafer 2 2000
beetle Onthophagus verticicornis a dung beetle or chafer 2 1886
beetle Onthophilus striatus a carrion beetle 1 2021
beetle Oodes helopioides a ground beetle 1 1983
beetle Oomorphus concolor a leaf beetle 17 2021
beetle Opatrum sabulosum a darkling beetle 1 2005
beetle Ophonus ardosiacus a ground beetle 6 2020
beetle Ophonus puncticeps a ground beetle 9 2020
beetle Ophonus rufibarbis a ground beetle 18 2020
beetle Ophonus schaubergerianus a ground beetle 4 2020
beetle Orchesia micans a false darkling beetle 1 2017
beetle Orchesia minor a false darkling beetle 2 2020
beetle Orchesia undulata a false darkling beetle 2 2020
beetle Orchestes an Orchestes species (unidentified) 1 2014
beetle Orchestes alni a weevil 6 2018
beetle Orchestes fagi Beech Leaf Miner 17 2020
beetle Orchestes pilosus a weevil 2 2018
beetle Orchestes quercus a weevil 3 2015
beetle Orchestes rusci a weevil 7 2016
beetle Orchestes signifer a weevil 9 2018
beetle Orobitis cyaneus Violet Weevil 1 2019
beetle Orsodacne cerasi a leaf beetle 9 2018
beetle Orthochaetes setiger a weevil 4 1938
beetle Orthocis alni a small fungus beetle 3 2020
beetle Orthoperus atomus a minute fungus beetle 1 2003
beetle Osphya bipunctata a false darkling beetle 3 2017
beetle Othius laeviusculus a rove beetle 1 2021
beetle Othius punctulatus a rove beetle 53 2021
beetle Othius subuliformis a rove beetle 38 2021
beetle Otiorhynchus clavipes Plum Weevil 40 2017
beetle Otiorhynchus crataegi a weevil 1 2008
beetle Otiorhynchus ligneus a weevil 1 2008
beetle Otiorhynchus ovatus a Strawberry Root Weevil 1 2019
beetle Otiorhynchus rugifrons a Strawberry Root Weevil 2 1968
beetle Otiorhynchus rugosostriatus a Strawberry Root Weevil 3 2005
beetle Otiorhynchus singularis Raspberry Weevil 21 2021
beetle Otiorhynchus sulcatus Vine Weevil 79 2020
beetle Oulema an Oulema sp. (unidentified) 2 2016
beetle Oulema erichsoni a leaf beetle 2 2009
beetle Oulema melanopus (s.l.) Cereal Leaf Beetle 73 2021
beetle Oulema melanopus (s.str.) a Beetle 7 2015
beetle Oulema obscura a Beetle 16 2021
beetle Oulema rufocyanea a Cereal Leaf Beetle 3 2015
beetle Oulema rufocyanea/melanopus agg. Cereal Leaf Beetles agg. 2 2017
beetle Oulimnius a Oulimnius riffle beetle (unidentified) 8 2012
beetle Oulimnius tuberculatus a riffle beetle 3 1997
beetle Oxypoda alternans a rove beetle 1 2020
beetle Oxypoda spectabilis a rove beetle 3 2021
beetle Oxyporus rufus a rove beetle 1 1986
beetle Oxypselaphus obscurus a Beetle 12 2021
beetle Oxystoma cerdo a seed weevil 10 2018
beetle Oxystoma pomonae a seed weevil 19 2021
beetle Oxystoma subulatum a seed weevil 24 2010
beetle Oxytelus an Oxytelus sp. (unidentified) 1 2018
beetle Oxytelus laqueatus a rove beetle 7 2021
beetle Oxythyrea funesta a dung beetle or chafer 1 2020
bird Oceanodroma leucorhoa Leach's Petrel 86 2022
bird Oenanthe deserti Desert Wheatear 26 2013
bird Oenanthe oenanthe Wheatear 10925 2022
bird Oenanthe oenanthe leucorhoa Greenland Wheatear 16 2019
bird Oriolus oriolus Golden Oriole 17 2022
bird Otis tarda Great Bustard 4 2010
bird Oxyura jamaicensis Ruddy Duck 920 2017
bird Oxyura leucocephala White-headed Duck 6 2019
bug Oncopsis alni a leafhopper 4 2021
bug Oncopsis carpini a leafhopper 1 2004
bug Oncopsis flavicollis a leafhopper 10 2021
bug Oncopsis subangulata a leafhopper 4 2020
bug Oncopsis tristis a leafhopper 3 2021
bug Oncotylus (Oncotylus) viridiflavus a plantbug or grassbug 10 2021
bug Opsius stactogalus a leafhopper 5 2020
bug Orius an Orius sp. (unidentified) 3 2018
bug Orius (Heterorius) laticollis a flower bug or bloodsucking bug 1 2018
bug Orius (Heterorius) vicinus a flower bug or bloodsucking bug 2 2008
bug Orius (Orius) laevigatus a flower bug or bloodsucking bug 19 2019
bug Orius (Orius) niger a flower bug or bloodsucking bug 12 2021
bug Orsillus depressus a ground bug 1 2017
bug Orthocephalus coriaceus a plantbug or grassbug 2 2021
bug Orthocephalus saltator a plantbug or grassbug 5 2020
bug Orthonotus rufifrons a plantbug or grassbug 3 2021
bug Orthops an Orthops sp. (unidentified) 2 2018
bug Orthops (Orthops) basalis a plantbug or grassbug 2 2017
bug Orthops (Orthops) campestris a plantbug or grassbug 45 2021
bug Orthops (Orthops) kalmii a plantbug or grassbug 5 2021
bug Orthotylus an Orthotylus sp. (unidentified) 1 2008
bug Orthotylus (Litocoris) ericetorum a plantbug or grassbug 9 2021
bug Orthotylus (Melanotrichus) flavosparsus a plantbug or grassbug 3 2009
bug Orthotylus (Orthotylus) marginalis Dark Green Apple Capsid 5 2020
bug Orthotylus (Orthotylus) ochrotrichus a plantbug or grassbug 2 2020
bug Orthotylus (Orthotylus) tenellus a plantbug or grassbug 5 2020
bug Orthotylus (Pachylops) adenocarpi a plantbug or grassbug 2 1999
bug Orthotylus (Pachylops) virescens a plantbug or grassbug 2 1995
caddis fly Odontocerum albicorne a caddisfly 4 2018
caddis fly Oecetis lacustris a caddisfly 1 2012
caddis fly Oecetis ochracea a caddisfly 7 2021
crustacean Orchestia an Orchestia sp. (unidentified) 2 2018
crustacean Orchestia gammarellus a sand hopper 21 2020
crustacean Orchestia mediterranea a crustacean 1 1940
crustacean Ostracoda a mussel shrimp (unidentified) 18 2013
dragonfly, hawker or damselfly Odonata a dragonfly, darter, chaser, hawker or damselfly (unidentified) 220 2022
dragonfly, hawker or damselfly Orthetrum an Orthetrum sp. (unidentified) 1 1997
dragonfly, hawker or damselfly Orthetrum cancellatum Black-tailed Skimmer 751 2022
dragonfly, hawker or damselfly Orthetrum coerulescens Keeled Skimmer 10 2021
fish Oncorhynchus mykiss Rainbow Trout 14 2011
fungus Oidium ericinum a conidial powdery mildew 1 2013
fungus Ombrophila violacea a fungus 2 2008
fungus Omphalina pyxidata a basidiomycete fungus 3 1997
fungus Opegrapha parasitica a lichen 5 2008
fungus Opegrapha rupestris a lichen 3 2018
fungus Ophiobolus vulgaris a fungus 1 2002
fungus Ophiocordyceps gracilis an ascomycete fungus 1 2005
fungus Ophiostoma ulmi Dutch Elm Disease 1 1997
fungus Orbilia an Orbilia sp. (unidentified) 1 1999
fungus Orbilia alnea an ascomycete fungus 2 1999
fungus Orbilia curvatispora an ascomycete fungus 1 1999
fungus Orbilia cyathea an ascomycete fungus 1 2015
fungus Orbilia luteorubella an ascomycete fungus 1 1999
fungus Orbilia sarraziniana an ascomycete fungus 1 2005
fungus Orbilia xanthostigma an ascomycete fungus 9 2014
fungus Ossicaulis lignatilis a basidiomycete fungus 4 2013
fungus Otidea a Otidea lichen or fungus (unidentified) 1 1970
fungus Otidea alutacea a fungus 5 2013
fungus Otidea cochleata a fungus 2 2006
fungus Otidea onotica a fungus 2 2013
fungus Oudemansiella mucida Porcelain Fungus 51 2018
fungus Oxyporus populinus a basidiomycete fungus 8 2011
grasshopper, cricket or true cricket Omocestus rufipes Woodland Grasshopper 11 2019
grasshopper, cricket or true cricket Omocestus viridulus Common Green Grasshopper 110 2021
grasshopper, cricket or true cricket Orthoptera an Orthoptera sp. (unidentified) 11 2022
harvestman Odiellus spinosus a harvestman 5 2018
harvestman Oligolophus tridens a harvestman 10 2020
harvestman Opilio an Opilio sp. (unidentified) 2 2016
harvestman Opilio canestrinii a harvestman (Opiliones) 15 2020
harvestman Opiliones a harvestman (unidentified) 24 2021
harvestman Opilio parietinus a harvestman 6 2015
harvestman Opilio saxatilis a harvestman 12 2018
lichen Ochrolechia androgyna a lichen 2 1996
lichen Ochrolechia parella a lichen 7 2016
lichen Opegrapha an Opegrapha sp. (unidentified) 4 2019
lichen Opegrapha atra a lichen 23 2020
lichen Opegrapha calcarea a lichen 8 2018
lichen Opegrapha dolomitica a lichen 1 2018
lichen Opegrapha herbarum a lichen 3 1998
lichen Opegrapha mougeotii a lichen 1 2002
lichen Opegrapha varia a lichen 1 1996
lichen Opegrapha vermicellifera a lichen 1 1988
lichen Opegrapha vulgata a lichen 6 2020
mammal Oryctolagus cuniculus Rabbit 1870 2024
mammal - marine Odobenus rosmarus Walrus 1 1839
mammal - marine Orcinus orca Killer Whale 3 1902
millipede Ommatoiulus sabulosus Striped Millipede 3 2019
millipede Ophiodesmus albonanus a millipede 1 1987
millipede Ophyiulus pilosus a julid snake millipede 7 2012
mollusc Odhneripisidium tenuilineatum Fine-lined Pea Mussel 1 2015
mollusc Omphiscola a Omphiscola pond snail (unidentified) 6 2007
mollusc Onchidoris muricata a mollusc 3 1939
mollusc Opisthobranchia an Opisthobranchia sp. (unidentified) 1 2015
mollusc Ostrea edulis Common Oyster 3 2019
mollusc Oxychilus a glass snail (unidentified) 11 2018
mollusc Oxychilus (Oxychilus) alliarius Garlic Snail 55 2020
mollusc Oxychilus (Oxychilus) cellarius Cellar Snail 66 2020
mollusc Oxychilus (Oxychilus) draparnaudi Draparnaud's Snail 24 2015
mollusc Oxychilus (Oxychilus) navarricus subsp. helveticus Glossy Glass Snail 40 2020
mollusc Oxyloma (Oxyloma) elegans Pfeiffer's Amber Snail 111 2016
moss Orthodontium lineare Cape Thread-moss 11 2018
moss Orthotrichum an Orthotrichum sp. (unidentified) 2 2013
moss Orthotrichum affine Wood Bristle-moss 129 2021
moss Orthotrichum anomalum Anomalous Bristle-moss 48 2021
moss Orthotrichum cupulatum Hooded Bristle-moss 1 2020
moss Orthotrichum diaphanum White-tipped Bristle-moss 50 2021
moss Orthotrichum lyellii Lyell's Bristle-moss 16 2021
moss Orthotrichum pulchellum Elegant Bristle-moss 26 2021
moss Orthotrichum stramineum Straw Bristle-moss 5 2018
moss Orthotrichum striatum Shaw's Bristle-moss 2 2018
moss Orthotrichum tenellum Slender Bristle-moss 6 2021
moss Oxyrrhynchium hians Swartz's Feather-moss 67 2021
moss Oxyrrhynchium pumilum Dwarf Feather-moss 12 2021
moth or butterfly - butterfly Ochlodes sylvanus Large Skipper 5472 2022
moth or butterfly - macro moth Ochropacha duplaris Common Lutestring 145 2022
moth or butterfly - macro moth Ochropleura leucogaster Radford's Flame Shoulder 3 2021
moth or butterfly - macro moth Ochropleura plecta Flame Shoulder 4857 2022
moth or butterfly - macro moth Odezia atrata Chimney Sweeper 86 2022
moth or butterfly - macro moth Odontopera bidentata Scalloped Hazel 473 2022
moth or butterfly - macro moth Odontosia carmelita Scarce Prominent 1 1905
moth or butterfly - macro moth Oligia a Oligia minor moth (unidentified) 661 2022
moth or butterfly - macro moth Oligia fasciuncula Middle-barred Minor 579 2022
moth or butterfly - macro moth Oligia latruncula Tawny Marbled Minor 948 2022
moth or butterfly - macro moth Oligia strigilis Marbled Minor 888 2022
moth or butterfly - macro moth Oligia strigilis agg. Marbled Minor agg. 816 2022
moth or butterfly - macro moth Oligia versicolor Rufous Minor 316 2022
moth or butterfly - macro moth Omphaloscelis lunosa Lunar Underwing 1890 2022
moth or butterfly - macro moth Operophtera brumata Winter Moth 459 2022
moth or butterfly - macro moth Operophtera fagata Northern Winter Moth 6 2005
moth or butterfly - macro moth Opisthograptis luteolata Brimstone Moth 5963 2022
moth or butterfly - macro moth Orgyia antiqua Vapourer 353 2022
moth or butterfly - macro moth Oria musculosa Brighton Wainscot 2 1976
moth or butterfly - macro moth Orthonama vittata Oblique Carpet 17 2007
moth or butterfly - macro moth Orthosia cerasi Common Quaker 2752 2022
moth or butterfly - macro moth Orthosia cruda Small Quaker 811 2022
moth or butterfly - macro moth Orthosia gothica Hebrew Character 3935 2022
moth or butterfly - macro moth Orthosia gracilis Powdered Quaker 364 2022
moth or butterfly - macro moth Orthosia incerta Clouded Drab 1915 2022
moth or butterfly - macro moth Orthosia miniosa Blossom Underwing 7 2009
moth or butterfly - macro moth Orthosia opima Northern Drab 10 2020
moth or butterfly - macro moth Orthosia populeti Lead-coloured Drab 9 2012
moth or butterfly - macro moth Ourapteryx sambucaria Swallow-tailed Moth 1199 2022
moth or butterfly - micro moth Ochsenheimeria taurella a micro-moth 7 2017
moth or butterfly - micro moth Ochsenheimeria vacculella a micro-moth 4 2016
moth or butterfly - micro moth Ocnerostoma friesei a micro-moth 2 2010
moth or butterfly - micro moth Oecophoridae an Oecophoridae sp. (unidentified) 1 2013
moth or butterfly - micro moth Oegoconia an Oegoconia sp. (unidentified) 118 2022
moth or butterfly - micro moth Oegoconia deauratella a micro-moth 13 2020
moth or butterfly - micro moth Oegoconia quadripuncta Four-spotted Obscure 238 2022
moth or butterfly - micro moth Oidaematophorus lithodactyla Dusky Plume 8 2020
moth or butterfly - micro moth Olethreutinae an Olethreutinae sp. (unidentified) 1 2011
moth or butterfly - micro moth Olindia schumacherana a tortrix moth 20 2021
moth or butterfly - micro moth Oncocera semirubella a pyralid moth 5 2021
moth or butterfly - micro moth Opostega salaciella a micro-moth 4 2022
moth or butterfly - micro moth Ortholepis betulae Birch Knot-horn 3 2001
moth or butterfly - micro moth Orthotaenia undulana a tortrix moth 9 2020
moth or butterfly - micro moth Orthotelia sparganella a micro-moth 9 2021
moth or butterfly - micro moth Ostrinia nubilalis European Corn Borer 118 2022
moth or butterfly - micro moth Oxypteryx atrella a micro-moth 5 2012
moth or butterfly - micro moth Oxyptilus parvidactyla a plume moth 7 2003
plant Odontites vernus Red Bartsia 1002 2021
plant Odontites vernus subsp. serotinus a red bartsia 1 1989
plant Oenanthe a water-dropwort (unidentified) 11 2018
plant Oenanthe aquatica Fine-leaved Water-dropwort 27 2010
plant Oenanthe crocata Hemlock Water-dropwort 2112 2021
plant Oenanthe fistulosa Tubular Water-dropwort 160 2016
plant Oenanthe fluviatilis River Water-dropwort 2 2002
plant Oenanthe lachenalii Parsley Water-dropwort 51 2016
plant Oenanthe pimpinelloides Corky-fruited Water-dropwort 325 2021
plant Oenothera an evening primrose (unidentified) 109 2021
plant Oenothera biennis Common Evening-primrose 54 2022
plant Oenothera cambrica Small-flowered Evening-primrose 38 2016
plant Oenothera glazioviana Large-flowered Evening-primrose 199 2022
plant Oenothera glazioviana x biennis = O. x fallax an evening-primrose 1 2016
plant Oenothera indecora a Plant 1 1923
plant Oenothera laciniata a Plant 1 1922
plant Oenothera stricta Fragrant Evening-primrose 8 2013
plant Oleaceae an Oleaceae sp. (unidentified) 1 2017
plant Olearia an Olearia sp. (unidentified) 1 2013
plant Omphalodes verna Blue-eyed Mary 5 2016
plant Onobrychis crista-galli a Plant 1 1937
plant Onobrychis viciifolia Sainfoin 72 2017
plant Ononis an Ononis sp. (unidentified) 65 2021
plant Ononis repens Common Restharrow 805 2020
plant Ononis spinosa Spiny Restharrow 340 2021
plant Onopordum acanthium Cotton Thistle 10 2007
plant Ophioglossum vulgatum Adder's-tongue 179 2019
plant Ophioglossum vulgatum (sens.lat.) Adder's-tongue (sens. lat.) 7 2005
plant Ophrys apifera Bee Orchid 600 2022
plant Ophrys apifera var. chlorantha a bee orchid 4 2021
plant Ophrys apifera var. friburgensis a bee orchid 10 2007
plant Ophrys insectifera Fly Orchid 73 2015
plant Ophrys insectifera x apifera a spider-orchid 2 1988
plant Orchidaceae an orchid (unidentified) 76 2020
plant Orchis mascula Early-purple Orchid 467 2020
plant Orchis purpurea Lady Orchid 2 1999
plant Origanum an Origanum sp. (unidentified) 3 2020
plant Origanum vulgare Wild Marjoram 1025 2021
plant Ornithogalum angustifolium Star-of-Bethlehem 49 2022
plant Ornithogalum nutans Drooping Star-of-Bethlehem 5 2014
plant Ornithogalum pyrenaicum Bath Asparagus 851 2022
plant Ornithogalum umbellatum a Plant 4 2019
plant Ornithopus perpusillus Bird's-foot 42 2016
plant Orobanchaceae an Orobanchaceae sp. (unidentified) 6 2017
plant Orobanche an Orobanche sp. (unidentified) 6 2009
plant Orobanche caryophyllacea Bedstraw Broomrape 1 1924
plant Orobanche elatior Knapweed Broomrape 6 2010
plant Orobanche hederae Ivy Broomrape 482 2021
plant Orobanche minor Common Broomrape 227 2021
plant Orobanche minor subsp. minor a common broomrape 14 2008
plant Orobanche rapum-genistae Greater Broomrape 4 2008
plant Osmanthus heterophyllus an ash 7 2000
plant Ostrya carpinifolia Hop Hornbeam 2 2015
plant Oxalis a Oxalis sorrel (unidentified) 31 2015
plant Oxalis acetosella Wood-sorrel 524 2020
plant Oxalis articulata Pink-sorrel 72 2020
plant Oxalis corniculata Procumbent Yellow-sorrel 110 2020
plant Oxalis corniculata var. atropurpurea a procumbent yellow-sorrel 2 2004
plant Oxalis debilis Large-flowered Pink-sorrel 7 2020
plant Oxalis dillenii Sussex Yellow-sorrel 1 2016
plant Oxalis exilis Least Yellow-sorrel 4 2013
plant Oxalis incarnata Pale Pink-sorrel 4 2017
plant Oxalis purpurea Purple-flowered Wood-sorrel 1 1985
plant Oxalis stricta Upright Yellow-sorrel 6 2019
plant Oxalis tetraphylla Four-leaved Pink-sorrel 1 2019
sea-fan, sea anemone or jellyfish Obelia dichotoma a Sea-fan/Sea Anemone/Jellyfish 1 1936
sea-fan, sea anemone or jellyfish Obelia geniculata a Sea-fan/Sea Anemone/Jellyfish 1 1924
sea-fan, sea anemone or jellyfish Obelia longissima a Sea-fan/Sea Anemone/Jellyfish 1 1937
spider Obscuriphantes obscurus a money spider 2 1989
spider Oedothorax agrestis a money spider 1 1986
spider Oedothorax apicatus a money spider 13 2003
spider Oedothorax fuscus a money spider 33 2019
spider Oedothorax retusus a money spider 20 2019
spider Oonops domesticus a six-eyed spider 4 2018
spider Oonops pulcher a six-eyed spider 3 1997
spider Ostearius melanopygius a money spider 1 1996
spider Oxyopidae an Oxyopidae sp. (unidentified) 2 2018
spider Ozyptila atomaria a crab spider 3 1989
spider Ozyptila brevipes a crab spider 1 1998
spider Ozyptila praticola a crab spider 1 2015
spider Ozyptila simplex a crab spider 2 2019
spider Ozyptila trux a crab spider 2 1985
springtail Oligaphorura schoetti a springtail (Collembola) 1 1963
springtail Onychiuridae an Onychiuridae sp. (unidentified) 1 1925
springtail Orchesella an Orchesella sp. (unidentified) 1 2015
springtail Orchesella cincta a springtail (Collembola) 25 2021
springtail Orchesella villosa a springtail (Collembola) 7 2020
tick or mite (acarine) Oribatida an oribatid mite (unidentified) 1 2017
true fly - Ochlerotatus an Ochlerotatus sp. (unidentified) 1 2011
true fly - Ochthera an Ochthera sp. (unidentified) 1 1997
true fly - Ocytata pallipes a parasitic fly 3 2020
true fly - Odinia boletina a fly 1 2000
true fly - Odontomyia an Odontomyia sp. (unidentified) 1 2011
true fly - Opacifrons coxata a lesser dung fly 1 1999
true fly - Opetia nigra a big-footed fly 11 2021
true fly - Ophiomyia pulicaria a leaf-mining fly 4 2008
true fly - Opomyza an Opomyza sp. (unidentified) 1 2019
true fly - Opomyza florum a fly 11 2009
true fly - Opomyza germinationis a fly 53 2020
true fly - Opomyza petrei a fly 19 2013
true fly - Ormosia an Ormosia sp. (unidentified) 1 2020
true fly - Ornithomya avicularia a flat fly 5 2020
true fly - Ornithomya chloropus a flat fly 1 1979
true fly - Ornithomya fringillina a flat fly 1 1979
true fly - Orthocladiinae an Orthocladiinae sp. (unidentified) 2 1991
true fly - Oscinella frit a fly 32 2015
true fly - Oscinella maura a fly 2 2006
true fly - Oscinella nigerrima a fly 7 2008
true fly - Oscinella nitidissima a fly 7 2008
true fly - Oscinella pusilla a fly 7 2008
true fly - Oscinella vastator a fly 1 1983
true fly - Oscinella vindicata a fly 5 2006
true fly - Oscinimorpha minutissima a fly 2 2008
true fly - Oswaldia muscaria a parasitic fly 1 2000
true fly - Otites guttatus a fly 1 2000
true fly - cranefly Ormosia bicornis a cranefly 3 2001
true fly - cranefly Ormosia hederae a cranefly 1 2000
true fly - cranefly Ormosia nodulosa a cranefly 3 2001
true fly - (diptera) Ophiomyia collini an insect - true fly (Diptera) 1 2004
true fly - hoverfly Orthonevra brevicornis a hoverfly 3 2000
true fly - hoverfly Orthonevra nobilis a hoverfly 7 2013
true fly - midge, gnat or mosquito Ochlerotatus annulipes a mosquito 3 1987
true fly - midge, gnat or mosquito Ochlerotatus cantans a mosquito 1 1985
true fly - midge, gnat or mosquito Ochlerotatus caspius a mosquito 1 2009
true fly - midge, gnat or mosquito Ochlerotatus detritus a mosquito 1 2002
true fly - midge, gnat or mosquito Ochlerotatus punctor a mosquito 1 1986
true fly - midge, gnat or mosquito Ochlerotatus rusticus a mosquito 9 1999
true fly - midge, gnat or mosquito Orfelia fasciata a fungus gnat 1 2006
true fly - midge, gnat or mosquito Orfelia nemoralis a fungus gnat 5 2006
true fly - midge, gnat or mosquito Orfelia ochracea a fungus gnat 2 2000
true fly - picture-winged, conopid or stilt-legged fly Orellia falcata a gall fly 2 2019
true fly - picture-winged, conopid or stilt-legged fly Oxyna nebulosa a gall fly 4 2006
true fly - picture-winged, conopid or stilt-legged fly Oxyna parietina a gall fly 3 2013
true fly - robber, empid or dolichopid fly Ocydromia glabricula a dance fly 15 2021
true fly - robber, empid or dolichopid fly Oedalea holmgreni a dance fly 1 2020
true fly - robber, empid or dolichopid fly Oedalea stigmatella a dance fly 4 2020
true fly - robber, empid or dolichopid fly Ogcodes gibbosus a hump-backed fly 2 2021
true fly - robber, empid or dolichopid fly Ogcodes pallipes a hump-backed fly 1 1907
true fly - robber, empid or dolichopid fly Oropezella sphenoptera a dance fly 11 2006
true fly - robber, empid or dolichopid fly Orthoceratium sabulosum a dolichopodid fly 1 1986
true fly - soldier or snipe fly Odontomyia ornata Ornate Brigadier 42 2017
true fly - soldier or snipe fly Odontomyia tigrina Black Colonel 38 2019
true fly - soldier or snipe fly Oplodontha viridula Common Green Colonel 62 2021
true fly - soldier or snipe fly Oxycera analis Dark-winged Soldier 1 1948
true fly - soldier or snipe fly Oxycera morrisii White-barred Soldier 4 1999
true fly - soldier or snipe fly Oxycera nigricornis Delicate Soldier 13 2020
true fly - soldier or snipe fly Oxycera pardalina Hill Soldier 6 2001
true fly - soldier or snipe fly Oxycera pygmaea Pygmy Soldier 4 2001
true fly - soldier or snipe fly Oxycera rara Four-barred Major 22 2015
true fly - soldier or snipe fly Oxycera terminata Yellow-tipped Soldier 1 1948
true fly - soldier or snipe fly Oxycera trilineata Three-lined Soldier 8 2002
woodlouse Oniscidae a Oniscidae woodlouse (unidentified) 2 2018
woodlouse Oniscus asellus Common Shiny Woodlouse 189 2020
worm Octolasion cyaneum Blue-grey Worm 24 2020
worm Octolasion lacteum an annelid 10 2017
worm Oligochaeta an oligochaete worm (unidentified) 142 2021