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 (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) Ophion an Ophion sp. (unidentified) 1 2017
ant, bee, wasp, sawfly or ichneumon (and others) Ophion luteus 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 an ichneumon wasp 4 1997
ant, bee, wasp, sawfly or ichneumon (and others) Opius caesus an insect - hymenopteran 1 2008
ant, bee, wasp, sawfly or ichneumon (and others) Opius pallipes a braconid wasp 1 2008
ant, bee, wasp, sawfly or ichneumon (and others) Orthopelma mediator an ichneumon wasp 1 1998
ant, bee, wasp, sawfly or ichneumon (and others) Osmia a mason bee (unidentified) 2 2013
ant, bee, wasp, sawfly or ichneumon (and others) Osmia (Chalcosmia) caerulescens Blue Mason Bee 11 2017
ant, bee, wasp, sawfly or ichneumon (and others) Osmia (Chalcosmia) leaiana a solitary bee 4 2002
ant, bee, wasp, sawfly or ichneumon (and others) Osmia (Helicosmia) aurulenta Gold-fringed Mason Bee 2 2000
ant, bee, wasp, sawfly or ichneumon (and others) Osmia (Neosmia) bicolor Two Coloured Mason Bee 11 2016
ant, bee, wasp, sawfly or ichneumon (and others) Osmia (Osmia) bicornis Red Mason Bee 51 2017
ant, bee, wasp, sawfly or ichneumon (and others) Oxybelus uniglumis Common Spiny Digger Wasp 3 2000
beetle Ochina ptinoides Ivy Boring Beetle 9 2017
beetle Ochthebius (Asiobates) dilatatus a Beetle 13 2015
beetle Ochthebius (Asiobates) dilatatus a small water beetle 6 2002
beetle Ochthebius (Homalochthebius) minimus a Beetle 10 2012
beetle Ochthebius (Homalochthebius) minimus a small water beetle 9 2016
beetle Ochthebius (Hymenodes) nanus a Beetle 1 2000
beetle Ochthebius (Ochthebius) marinus a small water beetle 4 2002
beetle Ochthebius (Ochthebius) viridis a Beetle 1 2009
beetle Ochthephilum an Ochthephilum sp. (unidentified) 1 2016
beetle Octotemnus glabriculus a small fungus beetle 1 2015
beetle Ocypus (Ocypus) olens Devil's Coach-horse 73 2018
beetle Ocypus (Pseudocypus) aeneocephalus a Beetle 1 2015
beetle Ocypus (Pseudocypus) fortunatarum a rove beetle 1 1978
beetle Ocys harpaloides a ground beetle 11 2017
beetle Ocys quinquestriatus a ground beetle 1 2002
beetle Oedemera an Oedemera sp. (unidentified) 3 2017
beetle Oedemera (Oedemera) lurida a thick-legged flower beetle 194 2017
beetle Oedemera (Oedemera) nobilis Swollen-thighed Beetle 484 2018
beetle Oedemera (Oncomera) femoralis a thick-legged flower beetle 29 2017
beetle Olibrus aeneus a smut beetle 2 2001
beetle Olibrus affinis a smut beetle 2 2017
beetle Olibrus liquidus a smut beetle 2 1962
beetle Olisthopus rotundatus a ground beetle 2 1998
beetle Olophrum piceum a rove beetle 2 1993
beetle Omalium caesum a rove beetle 4 2017
beetle Omalium laeviusculum a rove beetle 5 2017
beetle Omalium rivulare a rove beetle 3 2016
beetle Omalium rugatum a rove beetle 2 2016
beetle Omaloplia ruricola a dung beetle or chafer 4 2017
beetle Omonadus floralis an antlike beetle 6 2017
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 1 2001
beetle Ontholestes murinus a rove beetle 4 2010
beetle Ontholestes tessellatus a rove beetle 1 2007
beetle Onthophagus (Paleonthophagus) coenobita a dung beetle or chafer 5 2017
beetle Onthophagus (Paleonthophagus) joannae a Beetle 2 2000
beetle Onthophagus (Paleonthophagus) joannae a dung beetle or chafer 5 2017
beetle Onthophagus (Paleonthophagus) similis a dung beetle or chafer 1 2000
beetle Onthophagus (Paleonthophagus) vacca a dung beetle or chafer 4 1997
beetle Oodes helopioides a ground beetle 1 1983
beetle Oomorphus concolor a Beetle 3 2015
beetle Oomorphus concolor a leaf beetle 9 2017
beetle Opatrum sabulosum a darkling beetle 1 2005
beetle Ophonus (Metophonus) puncticeps a ground beetle 5 2015
beetle Ophonus (Metophonus) rufibarbis a ground beetle 15 2015
beetle Ophonus (Ophonus) ardosiacus a ground beetle 4 2011
beetle Orchesia micans a false darkling beetle 1 2017
beetle Orchesia undulata a false darkling beetle 1 2010
beetle Orchestes an Orchestes species (unidentified) 1 2014
beetle Orchestes (Orchestes) alni a weevil 1 2017
beetle Orchestes (Orchestes) quercus a weevil 3 2015
beetle Orchestes (Orchestes) rusci a weevil 3 2016
beetle Orchestes (Orchestes) signifer a weevil 4 2000
beetle Orchestes (Salius) fagi Beech Leaf Miner 7 2017
beetle Orsodacne cerasi a leaf beetle 8 2016
beetle Orthochaetes setiger a weevil 2 1938
beetle Orthocis alni a small fungus beetle 1 1978
beetle Orthoperus atomus a minute fungus beetle 1 2003
beetle Osphya bipunctata a false darkling beetle 3 2017
beetle Othius punctulatus a rove beetle 9 2016
beetle Othius subuliformis a rove beetle 4 2015
beetle Otiorhynchus (Dorymerus) singularis Raspberry Weevil 9 2017
beetle Otiorhynchus (Dorymerus) sulcatus Vine Weevil 51 2017
beetle Otiorhynchus (Otiorhynchus) clavipes Plum Weevil 21 2017
beetle Otiorhynchus (Otiorhynchus) rugosostriatus a Strawberry Root Weevil 3 2005
beetle Otiorhynchus (Tournieria) crataegi a weevil 1 2008
beetle Oulema an Oulema sp. (unidentified) 2 2016
beetle Oulema erichsoni a leaf beetle 2 2009
beetle Oulema melanopus (s.l.) a Beetle 21 2015
beetle Oulema melanopus (s.l.) Cereal Leaf Beetle 37 2017
beetle Oulema melanopus (s.str.) a Beetle 7 2015
beetle Oulema obscura a Beetle 10 2016
beetle Oulema rufocyanea a Cereal Leaf Beetle 3 2015
beetle Oulema rufocyanea/melanopus agg. Cereal Leaf Beetles agg. 1 1999
beetle Oulimnius a Oulimnius riffle beetle (unidentified) 8 2012
beetle Oulimnius tuberculatus a riffle beetle 3 1997
beetle Oxyporus rufus a rove beetle 1 1986
beetle Oxypselaphus obscurus a Beetle 10 2015
beetle Oxystoma cerdo a seed weevil 5 2016
beetle Oxystoma pomonae a seed weevil 8 2015
beetle Oxystoma subulatum a seed weevil 3 1999
beetle Oxytelus laqueatus a rove beetle 3 1998
bird Oceanodroma leucorhoa Leach's Petrel 12 2009
bird Oenanthe deserti Desert Wheatear 5 2013
bird Oenanthe oenanthe Wheatear 3468 2018
bird Oenanthe oenanthe subsp. leucorhoa Greenland Wheatear 4 2012
bird Oriolus oriolus Golden Oriole 5 2003
bird Otis tarda Great Bustard 4 2010
bird Oxyura jamaicensis Ruddy Duck 601 2012
bird Oxyura leucocephala White-headed Duck 5 2003
bug Oncopsis alni a leafhopper 1 2001
bug Oncopsis carpini a leafhopper 1 2004
bug Oncopsis flavicollis a leafhopper 4 2016
bug Oncotylus (Oncotylus) viridiflavus a plantbug or grassbug 3 1999
bug Orius an Orius sp. (unidentified) 2 2013
bug Orius (Heterorius) vicinus a flower bug or bloodsucking bug 2 2008
bug Orius (Orius) laevigatus a flower bug or bloodsucking bug 17 2015
bug Orius (Orius) niger a flower bug or bloodsucking bug 11 2013
bug Orsillus depressus a ground bug 1 2017
bug Orthocephalus coriaceus a plantbug or grassbug 1 2000
bug Orthocephalus saltator a plantbug or grassbug 3 1999
bug Orthonotus rufifrons a plantbug or grassbug 2 2015
bug Orthops an Orthops sp. (unidentified) 1 2008
bug Orthops (Orthops) basalis a plantbug or grassbug 2 2017
bug Orthops (Orthops) campestris a plantbug or grassbug 34 2017
bug Orthops (Orthops) kalmii a plantbug or grassbug 2 2015
bug Orthotylus an Orthotylus sp. (unidentified) 1 2008
bug Orthotylus (Litocoris) ericetorum a plantbug or grassbug 7 2016
bug Orthotylus (Melanotrichus) flavosparsus a plantbug or grassbug 3 2009
bug Orthotylus (Orthotylus) marginalis Dark Green Apple Capsid 4 2015
bug Orthotylus (Orthotylus) ochrotrichus a plantbug or grassbug 1 1978
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 3 2014
caddis fly Oecetis lacustris a caddisfly 1 2012
caddis fly Oecetis ochracea a caddisfly 5 2014
crustacean Orchestia an Orchestia sp. (unidentified) 1 2012
crustacean Orchestia gammarellus a sand hopper 15 2017
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) 112 2018
dragonfly, hawker or damselfly Orthetrum an Orthetrum sp. (unidentified) 1 1997
dragonfly, hawker or damselfly Orthetrum cancellatum Black-tailed Skimmer 684 2016
dragonfly, hawker or damselfly Orthetrum coerulescens Keeled Skimmer 9 2012
fish Oncorhynchus mykiss Rainbow Trout 13 2011
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 1 2010
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 7 2006
fungus Ossicaulis lignatilis a basidiomycete fungus 1 1995
fungus Otidea a Otidea lichen or fungus (unidentified) 1 1970
fungus Otidea alutacea a fungus 2 2005
fungus Otidea cochleata a fungus 1 1998
fungus Oudemansiella mucida Porcelain Fungus 30 2009
fungus Oxyporus populinus a basidiomycete fungus 8 2011
grasshopper, cricket or true cricket Omocestus rufipes Woodland Grasshopper 9 2016
grasshopper, cricket or true cricket Omocestus viridulus Common Green Grasshopper 95 2018
grasshopper, cricket or true cricket Orthoptera an Orthoptera sp. (unidentified) 5 2017
harvestman Odiellus spinosus a harvestman 3 2016
harvestman Oligolophus tridens a harvestman 9 2017
harvestman Opilio an Opilio sp. (unidentified) 2 2016
harvestman Opiliones a harvestman (unidentified) 20 2017
harvestman Opilio parietinus a harvestman 6 2015
harvestman Opilio saxatilis a harvestman 10 2008
lichen Ochrolechia androgyna a lichen 2 1996
lichen Ochrolechia parella a lichen 6 2013
lichen Opegrapha an Opegrapha sp. (unidentified) 2 2014
lichen Opegrapha atra a lichen 20 2017
lichen Opegrapha calcarea a lichen 7 2012
lichen Opegrapha herbarum a lichen 3 1998
lichen Opegrapha mougeotii a lichen 1 2002
lichen Opegrapha vermicellifera a lichen 1 1988
lichen Opegrapha vulgata a lichen 5 2016
mammal Oryctolagus cuniculus Rabbit 1715 2018
mammal - marine Odobenus rosmarus Walrus 1 1839
mammal - marine Orcinus orca Killer Whale 3 1902
millipede Ommatoiulus sabulosus Striped Millipede 1 2010
millipede Ophyiulus pilosus a julid snake millipede 6 2012
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 Oxychilus a glass snail (unidentified) 11 2018
mollusc Oxychilus (Oxychilus) alliarius Garlic Snail 49 2016
mollusc Oxychilus (Oxychilus) cellarius Cellar Snail 57 2013
mollusc Oxychilus (Oxychilus) draparnaudi Draparnaud's Snail 23 2015
mollusc Oxychilus (Oxychilus) navarricus subsp. helveticus Glossy Glass Snail 33 2016
mollusc Oxyloma (Oxyloma) elegans Pfeiffer's Amber Snail 109 2011
moss Orthodontium lineare Cape Thread-moss 8 2006
moss Orthotrichum an Orthotrichum sp. (unidentified) 2 2013
moss Orthotrichum affine Wood Bristle-moss 65 2017
moss Orthotrichum anomalum Anomalous Bristle-moss 18 2017
moss Orthotrichum diaphanum White-tipped Bristle-moss 20 2017
moss Orthotrichum lyellii Lyell's Bristle-moss 6 2018
moss Orthotrichum pulchellum Elegant Bristle-moss 9 2007
moss Orthotrichum stramineum Straw Bristle-moss 3 2017
moss Orthotrichum tenellum Slender Bristle-moss 3 2016
moss Oxyrrhynchium hians Swartz's Feather-moss 33 2013
moss Oxystegus sinuosus Wavy Beard-moss 18 2017
moth or butterfly - butterfly Ochlodes sylvanus Large Skipper 4329 2018
moth or butterfly - macro moth Ochropacha duplaris Common Lutestring 100 2018
moth or butterfly - macro moth Ochropleura plecta Flame Shoulder 3705 2018
moth or butterfly - macro moth Odezia atrata Chimney Sweeper 75 2018
moth or butterfly - macro moth Odontopera bidentata Scalloped Hazel 410 2018
moth or butterfly - macro moth Oligia a Oligia minor moth (unidentified) 164 2018
moth or butterfly - macro moth Oligia fasciuncula Middle-barred Minor 430 2018
moth or butterfly - macro moth Oligia latruncula Tawny Marbled Minor 891 2018
moth or butterfly - macro moth Oligia strigilis Marbled Minor 802 2016
moth or butterfly - macro moth Oligia versicolor Rufous Minor 303 2017
moth or butterfly - macro moth Omphaloscelis lunosa Lunar Underwing 1386 2017
moth or butterfly - macro moth Operophtera brumata Winter Moth 406 2018
moth or butterfly - macro moth Operophtera fagata Northern Winter Moth 6 2005
moth or butterfly - macro moth Opisthograptis luteolata Brimstone Moth 4420 2018
moth or butterfly - macro moth Orgyia antiqua Vapourer 299 2017
moth or butterfly - macro moth Oria musculosa Brighton Wainscot 1 1976
moth or butterfly - macro moth Orthonama vittata Oblique Carpet 17 2007
moth or butterfly - macro moth Orthosia cerasi Common Quaker 1992 2019
moth or butterfly - macro moth Orthosia cruda Small Quaker 607 2018
moth or butterfly - macro moth Orthosia gothica Hebrew Character 2912 2019
moth or butterfly - macro moth Orthosia gracilis Powdered Quaker 287 2017
moth or butterfly - macro moth Orthosia incerta Clouded Drab 1433 2018
moth or butterfly - macro moth Orthosia miniosa Blossom Underwing 6 2009
moth or butterfly - macro moth Orthosia opima Northern Drab 8 2007
moth or butterfly - macro moth Orthosia populeti Lead-coloured Drab 4 2012
moth or butterfly - macro moth Ourapteryx sambucaria Swallow-tailed Moth 955 2018
moth or butterfly - micro moth Ochsenheimeria taurella a micro-moth 7 2017
moth or butterfly - micro moth Ochsenheimeria vacculella a micro-moth 3 2000
moth or butterfly - micro moth Ocnerostoma friesei a micro-moth 2 2010
moth or butterfly - micro moth Oegoconia deauratella a micro-moth 3 2017
moth or butterfly - micro moth Oegoconia quadripuncta Four-spotted Obscure 177 2017
moth or butterfly - micro moth Oidaematophorus lithodactyla Dusky Plume 7 2014
moth or butterfly - micro moth Olindia schumacherana a tortrix moth 11 2014
moth or butterfly - micro moth Oncocera semirubella a pyralid moth 3 2014
moth or butterfly - micro moth Ortholepis betulae Birch Knot-horn 2 2001
moth or butterfly - micro moth Orthotaenia undulana a tortrix moth 7 2011
moth or butterfly - micro moth Orthotelia sparganella a micro-moth 6 2013
moth or butterfly - micro moth Ostrinia nubilalis European Corn Borer 61 2015
moth or butterfly - micro moth Oxyptilus parvidactyla a plume moth 4 2003
moth or butterfly - moth (macro or micro not listed) moth Oecophoridae an Oecophoridae sp. (unidentified) 1 2013
moth or butterfly - moth (macro or micro not listed) moth Oegoconia an Oegoconia sp. (unidentified) 47 2018
moth or butterfly - moth (macro or micro not listed) moth Olethreutinae an Olethreutinae sp. (unidentified) 1 2011
moth or butterfly - moth (macro or micro not listed) moth Oligia strigilis agg. Marbled Minor agg. 528 2018
plant Odontites vernus Red Bartsia 886 2018
plant Odontites vernus subsp. serotinus a red bartsia 1 1989
plant Oenanthe a water-dropwort (unidentified) 9 2013
plant Oenanthe aquatica Fine-leaved Water-dropwort 23 2006
plant Oenanthe crocata Hemlock Water-dropwort 1802 2018
plant Oenanthe fistulosa Tubular Water-dropwort 144 2016
plant Oenanthe fluviatilis River Water-dropwort 1 2002
plant Oenanthe lachenalii Parsley Water-dropwort 38 2011
plant Oenanthe pimpinelloides Corky-fruited Water-dropwort 275 2018
plant Oenothera an evening primrose (unidentified) 76 2017
plant Oenothera biennis Common Evening-primrose 39 2014
plant Oenothera cambrica Small-flowered Evening-primrose 21 2015
plant Oenothera glazioviana Large-flowered Evening-primrose 170 2017
plant Oenothera indecora a Plant 1 1923
plant Oenothera laciniata a Plant 1 1922
plant Oenothera stricta Fragrant Evening-primrose 4 2010
plant Oleaceae an Oleaceae sp. (unidentified) 1 2017
plant Olearia an Olearia sp. (unidentified) 1 2013
plant Omphalodes verna Blue-eyed Mary 3 2003
plant Onobrychis crista-galli a Plant 1 1937
plant Onobrychis viciifolia Sainfoin 66 2017
plant Ononis an Ononis sp. (unidentified) 63 2013
plant Ononis repens Common Restharrow 696 2017
plant Ononis spinosa Spiny Restharrow 306 2017
plant Onopordum acanthium Cotton Thistle 7 2007
plant Ophioglossum vulgatum Adder's-tongue 155 2016
plant Ophioglossum vulgatum (sens.lat.) Adder's-tongue (sens. lat.) 7 2005
plant Ophrys apifera a bee orchid 1 2002
plant Ophrys apifera Bee Orchid 462 2019
plant Ophrys apifera var. friburgensis a bee orchid 5 2006
plant Ophrys insectifera Fly Orchid 50 2015
plant Ophrys insectifera x apifera a spider-orchid 2 1988
plant Orchidaceae an orchid (unidentified) 73 2015
plant Orchis mascula Early-purple Orchid 390 2017
plant Orchis purpurea Lady Orchid 1 1990
plant Origanum an Origanum sp. (unidentified) 2 2013
plant Origanum vulgare Wild Marjoram 790 2017
plant Ornithogalum angustifolium Star-of-Bethlehem 39 2015
plant Ornithogalum nutans Drooping Star-of-Bethlehem 4 2014
plant Ornithogalum pyrenaicum Bath Asparagus 647 2018
plant Ornithopus perpusillus Bird's-foot 36 2014
plant Orobanchaceae a broomrape or toothwort (unidentified) 3 2014
plant Orobanchaceae an Orobanchaceae sp. (unidentified) 2 2002
plant Orobanche an Orobanche sp. (unidentified) 6 2009
plant Orobanche elatior Knapweed Broomrape 3 1989
plant Orobanche hederae Ivy Broomrape 396 2017
plant Orobanche minor Common Broomrape 178 2017
plant Orobanche minor subsp. minor a common broomrape 14 2008
plant Orobanche rapum-genistae Greater Broomrape 3 1992
plant Osmanthus heterophyllus an ash 7 2000
plant Osmunda regalis Royal Fern 2 2007
plant Ostrya carpinifolia Hop Hornbeam 2 2015
plant Oxalis a Oxalis sorrel (unidentified) 30 2015
plant Oxalis acetosella Wood-sorrel 454 2017
plant Oxalis articulata Pink-sorrel 49 2016
plant Oxalis corniculata Procumbent Yellow-sorrel 83 2017
plant Oxalis debilis Large-flowered Pink-sorrel 1 2017
plant Oxalis exilis Least Yellow-sorrel 2 1997
plant Oxalis incarnata Pale Pink-sorrel 2 2013
plant Oxalis purpurea Purple-flowered Wood-sorrel 1 1985
plant Oxalis stricta Upright Yellow-sorrel 2 2010
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 1 1989
spider Oedothorax agrestis a money spider 1 1986
spider Oedothorax apicatus a money spider 13 2003
spider Oedothorax fuscus a money spider 25 2003
spider Oedothorax retusus a money spider 19 2009
spider Oonops domesticus a six-eyed spider 1 1969
spider Oonops pulcher a six-eyed spider 3 1997
spider Ostearius melanopygius a money spider 1 1996
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 1 2003
spider Ozyptila trux a crab spider 2 1985
springtail Oligaphorura schoetti a springtail (Collembola) 1 1963
springtail Orchesella an Orchesella sp. (unidentified) 1 2015
springtail Orchesella cincta a springtail (Collembola) 16 2016
springtail Orchesella villosa a springtail (Collembola) 6 2015
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 2 2001
true fly - Odontomyia an Odontomyia sp. (unidentified) 1 2011
true fly - Opacifrons coxata a lesser dung fly 1 1999
true fly - Opacifrons septentrionalis a lesser dung fly 2 1996
true fly - Opetia nigra a big-footed fly 2 2003
true fly - Ophiomyia pulicaria a leaf-mining fly 4 2008
true fly - Opomyza florum a fly 10 2009
true fly - Opomyza germinationis a fly 50 2015
true fly - Opomyza petrei a fly 19 2013
true fly - Ornithomya avicularia a flat fly 2 2018
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 1 2006
true fly - Oscinella nigerrima a fly 6 2008
true fly - Oscinella nitidissima a fly 6 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 bifurcata a cranefly 1 2000
true fly - cranefly Ormosia hederae a cranefly 1 2000
true fly - cranefly Ormosia nodulosa a cranefly 2 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 6 2013
true fly - midge, gnat or mosquito Oligotrophus betulae a gall midge 1 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 4 2006
true fly - midge, gnat or mosquito Orfelia ochracea a fungus gnat 1 2000
true fly - picture-winged, conopid or stilt-legged fly Orellia falcata a gall fly 1 1999
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 9 2006
true fly - robber, empid or dolichopid fly Oedalea stigmatella a dance fly 2 2001
true fly - robber, empid or dolichopid fly Ogcodes gibbosus a hump-backed fly 1 2010
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 8 2006
true fly - robber, empid or dolichopid fly Orthoceratium lacustre a dolichopodid fly 1 1986
true fly - soldier or snipe fly Odontomyia ornata Ornate Brigadier 40 2013
true fly - soldier or snipe fly Odontomyia tigrina Black Colonel 35 2013
true fly - soldier or snipe fly Oplodontha viridula Common Green Colonel 59 2013
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 12 2001
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 Oniscus asellus Common Shiny Woodlouse 124 2018
worm Octolasion cyaneum Blue-grey Worm 22 2017
worm Octolasion lacteum an annelid 11 2017
worm Oligochaeta an oligochaete worm (unidentified) 89 2016