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Eumerus ornatus

 
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stuart
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Joined: 11 May 2005
Posts: 737
Location: Peterborough, UK

PostPosted: Sat May 28, 2005 5:39 pm    Post subject: Eumerus ornatus Reply with quote

Eumerus ornatus Meigen, 1822

Identification ease/difficulty: 3

StatusHabitat indicator statusSources of information
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stuart
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Joined: 11 May 2005
Posts: 737
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.

Eumerus ornatus Meigen, 1822

Biology: The larvae are undescribed, but this genus usually live in plant bulbs or roots. Adults are normally found in deciduous woodland where they can be found resting on bare patches on paths and banks, flying low over, or sunning on, short vegetation. Males are distinctly territorial and defend sunlit patches. Occasionally visit flowers such as Geranium robertianum

Distribution: A local species in well-wooded areas of southern Britain, with scattered records north to the Lake District. Recent records suggest that this species is less scarce than was thought, and may often be overlooked because of its habit of staying close to the ground
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stuart
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Joined: 11 May 2005
Posts: 737
Location: Peterborough, UK

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).

EUMERUS ORNATUS Meigen NOTABLE

DISTRIBUTION Records widely scattered in England and Scotland as far north as Midlothian. Little available information for Wales, though likely to occur there. Most frequent in old woodland areas of southern England.

HABITAT Broadleaved woodland. The association with old woods is particularly strong, and small pockets of woodland are used in addition to large forest areas.

ECOLOGY Unknown; other members of the genus develop in bulbs. The adults are recorded from April to August, preferring woodland rides and edges where they fly low over paths and herbage sometimes settling on sunlit ground or foliage.

STATUS A very local species with about 20 known post 1960 sites. It can be locally frequent in some areas such as Somerset, Gloucestershire, Westmorland and the New Forest.

THREAT The clearance of old woods for agriculture or intensive forestry and shading out of rides and clearings which may support the larval food plant.

MANAGEMENT Maintain rides and clearings in an open condition rotational management of these where necessary to prevent scrub invasion.
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