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Ferdinandea ruficornis

 
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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: Ferdinandea ruficornis Reply with quote

Ferdinandea ruficornis (Fabricius, 1775)

Identification ease/difficulty: 4

StatusHabitat indicator statusSources of information
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stuart
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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.

Ferdinandea ruficornis (Fabricius, 1775)

Biology: The larvae remain undescribed but are thought to be associated with sap runs. The species has been reared from a burrow of the goat moth Cossus cossus, on Populus and puparia have been found at the base of Populus attacked by Cossus larvae. Believed to be associated with deciduous woodland with overmature trees. Adults are seldom found and may be largely arboreal, but have been found sunning on tree trunks and visiting Heracleum umbels

Distribution: A scarce species, with recent records being dominated by specimens from Malaise traps, some of these operating well away from substantial areas of woodland. It is possible that adults are overlooked, perhaps by staying high in the canopy. Stubbs & Falk (1983), however, suggest genuine scarcity due to a close association with burrows of the goat moth, which is itself a scarce insect (see map in British Wildlife 4(5), p323)
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stuart
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PostPosted: Sun May 29, 2005 9:08 am    Post subject: Data sheet from Insect Red Data Book, Shirt, 1987 Reply with quote

Datasheet from the Insect Red Data Book, Shirt (1989).

Ferdinandea ruficornis (F., 1775) VULNERABLE

Identification: Stubbs & Falk (1983), pp. 87 and 177, pl. 5:2

Distribution: Only currently known from a few places in the New Forest. Otherwise there are only a few old records for southern England, and one specimen from Derbyshire.

Habitat and ecology: Woodland with sufficient goat moth trees. Adults occur in mid-summer sitting on tree trunks with sap runs caused by caterpillars of the goat mothCossus cossus. The larvae have also been found in such situations, seemingly the essential breeding conditions.

Status: This species has always been rare, but it is in danger of extinction if the goat moth declines for any reason at the only known sites. The population is estimated to be very small.Conservation: The priority is to ensure that the habitat is not destroyed. It is very difficult to devise positive measures: a survey of any new major sites for goat moth will be required.Threats: The major decline in the status of the goat moth in the last thirty years has severely reduced the potential habitat. The hoverfly clearly requires continuity of habitat in viable quantity. The reason for the decline of the moth is not entirely clear, though reduction in the abundance of old trees and the removal of unsound infested trees must have contributed to the problem.

Author: A. E. Stubbs, using additional information from Coe (1953) and I. Perry (pers. comm.).
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stuart
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PostPosted: Sun May 29, 2005 9:09 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).

FERDINANDEA RUFICORNIS (Fabricius) NOTABLE

DISTRIBUTION Scattered records in southern England and the Midlands and also for East Lothian in Scotland (1918).

HABITAT Broadleaved woodland, especially old woodlands with trees infested with goat moth.

ECOLOGY Larvae probably develop in the sap runs of old, diseased trees, especially those infested with the goat moth (the association of these two species is probably indirect). Adults recorded from April to August, probably as two broods, and may be found sunbathing on the trunks of large trees.

STATUS Widespread but very local. Possibly declining at sites such as the New Forest where fairly frequent early this century though in recent years it has been regularly turning up in new counties. About 20 known post 1960 sites, scattered widely. Status revised from RDB2 (Shirt 1987).

THREAT Clearance of old woodland for agriculture or intensive forestry and removal of the old and diseased trees within.

MANAGEMENT Retain any old or diseased trees with sap runs and ensure continuity of these in the future.
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