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Episyrphus balteatus

 
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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: Episyrphus balteatus Reply with quote

Episyrphus balteatus (De Geer, 1776)

Identification ease/difficulty: 1

Sources of information
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Last edited by stuart on Sun Jan 22, 2006 11:33 am; edited 2 times in total
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stuart
Site Admin


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.

Episyrphus balteatus (De Geer, 1776) Syrphus balteatus De Geer in Coe (1953)

Biology: The larvae have been recorded preying on a wide range of aphid species on trees, shrubs and herbs, including cereal crops and cabbages (especially in gardens), but appears to prefer aphid colonies low down. Adults are usually seen visiting flowers or basking on sunlit foliage. They are very frequent in gardens, parks and waste ground including those in urban areas, sometimes in considerable numbers

Distribution: This species migrates north from southern Europe in the spring, breeding along the way. Migrants typically arrive in Britain in late June and July when aphid numbers are building up, and larvae can reach high densities in cereal crops, resulting in vast numbers of emerging adults in late summer. In the autumn it migrates southwards again and the adults overwinter. It normally has a single generation in Britain, but some adults overwinter here and unseasonal records can occur if the weather is mild. This is one of the most abundant and widespread hoverflies, and the species for which the recording scheme has received most records, although numbers vary considerably from year to year depending on conditions for migration and on aphid numbers
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