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Heringia verrucula

 
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stuart
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Joined: 11 May 2005
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Location: Peterborough, UK

PostPosted: Sat May 28, 2005 5:39 pm    Post subject: Heringia verrucula Reply with quote

Heringia verrucula (Collin, 1931)

NomenclatureIdentification ease/difficulty: 4

StatusSources of information
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stuart
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Joined: 11 May 2005
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Location: Peterborough, UK

PostPosted: Sun May 29, 2005 8:41 am    Post subject: Species account from the Provisional atlas Reply with quote

Species account from Provisional atlas of British hoverflies, Ball & Morris, 2000.

Heringia verrucula (Collin, 1931) Cnemodon verrucula Collin in Coe (1953), Neocnemodon verrucula (Collin) in Stubbs & Falk (1983)

Biology: The larvae are undescribed. Associated with a range of deciduous and mixed woodland. Adults fly low and rapidly amongst low vegetation along woodland rides and clearings. An early flying species which can be found visiting spring flowering shrubs such as Salix

Distribution: Very few, widely scattered records north to the Scottish Highlands
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stuart
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PostPosted: Sun May 29, 2005 9:08 am    Post subject: Data sheet from National Review of Diptera, Falk, 1991 Reply with quote

Datasheet from the Review of Scarce and Threatened Diptera, Falk (1991).

NEOCNEMODON VERRUCULA (Collin) NOTABLE

DISTRIBUTION Scattered records mainly the the south of England (Dorset, Hampshire, Sussex, Suffolk, Cambridgeshire, Herefordshire), but also from Lancashire and from Fife, Perthshire and Midlothian in Scotland.

HABITAT Probably woodland.

ECOLOGY Known larvae of Neocnemodon species are arborial predators of adelgid bugs on conifers, though it is unclear if this species is associated with coniferous or broadleaved woods. Adults recorded in May and June.

STATUS Five known post 1960 sites: Studland, Dorset (1986); Botley Wood, Hampshire (1986); Haugh Wood, Herefordshire (1981); Tentsmuir Forest, Fifeshire (1983) and Blackwood of Rannoch, Perthshire (early 1960s). The secretive and perhaps canopy dwelling nature of the adults combined with some taxonomic difficulty in the genus (females cannot yet be identified) may have led to some under recording. N. verrucula does not appear to be indigenous to the Scottish Highlands and may be a relatively recent addition to the British fauna, especially if a non-native conifer proves to be the normal larval situation.

THREAT Clearance of woodland for agriculture or intensive forestry.

MANAGEMENT Maintain open rides and clearings in woods with flowers for adult feeding.
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