Diptera, Sy Ae)
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Ce nt re fo r Eco logy & Hydrology N AT U RA L ENVIRO N M EN T RESEA RC H CO U N C IL Provisional atlas of British hover les (Diptera, Sy ae) _ Stuart G Ball & Roger K A Morris _ J O I N T NATURE CONSERVATION COMMITTEE NERC Co pyright 2000 Printed in 2000 by CRL Digital Limited ISBN I 870393 54 6 The Centre for Eco logy an d Hydrolo gy (CEI-0 is one of the Centres an d Surveys of the Natu ral Environme nt Research Council (NERC). Established in 1994, CEH is a multi-disciplinary , environmental research organisation w ith som e 600 staff an d w ell-equipp ed labo ratories and field facilities at n ine sites throughout the United Kingdom . Up u ntil Ap ril 2000, CEM co m prise d of fou r comp o nent NERC Institutes - the Institute of Hydrology (IH), the Institute of Freshw ater Eco logy (WE), the Institute of Terrestrial Eco logy (ITE), and the Institute of Virology an d Environmental Micro b iology (IVEM). From the beginning of Ap dl 2000, CEH has operated as a single institute, and the ind ividual Institute nam es have ceased to be used . CEH's mission is to "advance th e science of ecology, env ironme ntal microbiology and hyd rology th rough h igh q uality and inte rnat ionall) recognised research lead ing to better understanding and quantifia ttion of the p hysical, chem ical and b iolo gical p rocesses relating to land an d freshwater an d living organisms within the se environments". CEH prov ides independent research to info rm governm ent policy on natural resource man agemen t and en vironm ental protection, and to raise public awareness of en vironm en tal issues. Major develop ments in com missio ned research ft m ded by Govern ment have taken place in severa l areas of pu blic co ncern , su ch as flood risk estim ation and flood forecasting, risk assessment of genetically mo dified cro ps, the ecological effects of endocrin e disrup to rs, and th e eco logical impacts and d rive rs of land use change . CEFEs rese arc h is finance d by the UK Government thro ugh th e scie nce budget, an d by private and p ublic se cto r cu sto mers who comm ission o r sponso r specific research programm es. CEFEs expertise is also w idely used by international organisations in overseas co llaborative projects. Th e resu lts of CEH re search are available to those respo nsible for the protection, manageme nt and w ise use o f our nat ural resou rces, bein g published in a wide range of scientific joumals an d other publicatio ns. The CEH Ann ual Report contains more general information , Th e Biological Reco rds Centre is operated by CEH , as p art of the Environmental Information Cen tre based at CEH Mon ks Wood (form erly ITE Monks Wood). BRC is jo intly fund ed by CEH and th e Jo int Natu re Con se rvation Com m ittee (JNCC), the latter acting on behalf of the statutory nat ure conser vation agencies in England , Sco tland . Wales and Northern Ireland . CEH and JNCC su p port BRC as an important co mp onent of the developing National Biodiversity Network. BRC seeks to help natu ra lists and research biologists to co-ordinate their efforts in study ing the occurre nce of plants an d an imals in Britain and Ireland , and to ma ke the results of these studies available to o thers. Pu blish ed by B iolog ica l Records Cen tre CE TI M on ks Wood A b bots Rip on H u n ting d on Ca m bs PE28 2 LS Tel: 0 14 8 7 772 400; Fax : 0 14 8 7 773 4 6 7; WWW bitp :// w w w .ceb .a c u le Cover illustration:Rh ing ia ca mp estris by Stuart G Ball REF Cols-9-3- c4 )0) es-f Cid - 2 _0 0 Centre for Ecology & Hydrology NAT U RAL ENVIRO N MEN T RESEA RC H C OUN CIL CE.,1 I 1RGH LIBRARY Provisional atlas of British h overfl ies (Diptera, Sy rphidae) Stu a rt G Ball & Roger K A Morris Centre for Ecology end Hydrology Bush Estate Penicaik Mithothien / EI-126 OQB JOINT NATURE CONSERVATION COMMITTEE Citatio n in fo rm atio n Ball S.G. & Morris A.K.A. 2000. Provisional atlas of B ritish hoverfl ies (D ip tera, Sy p hidae) . Hu ntingdon : Biological Records Centre . CON TENTS I N TR OD UCTI ON 1 Histo ry of the Hoverfly Recording Scheme 1 Coverage 2 STA TUS OF H OVER FLIES IN BR I TAI N 5 Species recorded from Ireland but not Britain 5 Species believed to have become established , or to have increased 5 Species believed to be migrants, partial migrants or vagrants 5 Species believed to be extinct in Britain 6 Species which have declined sign ificantly 6 Rarity and threat 8 Biodiversity Action Plans 8 Habitat-indicator statuses 9 N OTE S ON TH E DISTR IB UTI ON MA P S A N D SPE CIES A CCO UN TS 13 The maps 13 Nomenclature 13 Species accounts 13 Ph enology histograms 13 MA P S AN D SPE CIES A CCO UN TS 15 A CK N OWLED GEM EN TS 151 R EFE R EN CES 155 SPE CIES INDEX 159 á IN TR OD UCTI ON The hoverflies are a family of attractive, and often Philip Entw istle retired as Recording Scheme organiser brightly coloured flies which are Familiar to most and Hoverf- ly Newsletter editor. The latter job was people be cause they are frequently seen visiting taken over by Graham Rotheray, and the workload of flowers in parks and gardens. They have rece ived a dealing with records was spread by establishing a generally 'goo d press' as beneficial insects because network of local advisors to check and forward the larvae of many of the common garden species records to BRC. feed on aphids . However, because many possess wasp-like black and yellow striped patterns, or In 1988 a new journal, D ipterists D igest, was launched mimic be es, they are often mistaken for which has prove d an important vehicle for papers on Hymenoptera, and during mass movements of some the natural history of hoverflies in Britain, Ireland and of the common migratory species have occasionally the near continent. The first issue featured a hoverfly figured in the press as 'a plague of wasps'. They are on the front cover and papers concerning hoverflies often the first group to be tackled by budding have always provided a substantial portion of the dipterists and the availability of a well illustrated contents. identification guide (Stubbs & Falk 1983) has greatly boosted interest in the group over the last decade . Between 1987 and 1991 the Recording Scheme With 266 British species, many (but by no means all) underwent a period of inactivity with no national of which are easily identified, they are an ideal organiser and with no prospect of BRC having group to study. They are also extremely diverse in resources to progress the provisional atlas. Then, in form, life-style and habitat preference, which means late 1990, Stuart Ball and Roger Morris took over as that an interesting range of species can be found in national organisers, with Roger Morris in charge of most localities and habitats. These factors have day-to-day liaison with contributors and record en couraged an active recording scheme which has checking, and Stuart Ball in charge of data processing. collated information about the distribution and In Autumn 1991 the records that had been natural history of these fascinating insects. computerised by BRC were loaded into a copy of the Recorder database and the process of checking them History of t he Hoverfly Recording began . The considerable backlog of information on Scheme cards and other paper forms which had be en submitted to BRC, but not input to computer, was The Hoverfly Recording Scheme was launched in another rather daunting task. By 1992 the records 1976 (Stubbs 1990), under the umbre lla of the input by BRC had been checked against the original Central Panel of Diptera Recording Schemes, with cards and progress was being made on trawling new John lsmay as the first national organ iser. In 1980 records, both on cards and on disk from various Philip Entwistle took over as scheme organiser and databases. he subsequently initiated the Houerfly Newsletter which first appeared in October 1982 including six In 1992 David Iliff took over as editor of Hoverfl y distribution maps. In 1983 a preliminary atlas, Newsletter and in March 1993 the Central Panel containing 30 hand-plotted maps, was produced by started a series of ann ual training events with a the Biological Records Centre (BRC) (Entwistle & weekend wo rkshop on hoverfly identification at Stubbs 1983). Also in 1983 British Hoverflies, a well Preston Montford Field Studies Centre . In 1994 the illustrated and 'user friendly' identification guide, was Central Panel reformed itself as an indepe ndent published (Stubbs & Falk 1983), which opened up society, 'Dipterists Forum', affiliated to the British hoverfly recording to many more people. Anoth er Entomological and Natural History Society. Its significant publication was Hoverflies in the objectives include publication of newsletters, such as Na turalists ' Ha nd books series (Gilbert 1986).