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Northamptonshire hoverfly

 
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Birderfirst



Joined: 22 Sep 2006
Posts: 50

PostPosted: Mon Jul 23, 2007 7:55 pm    Post subject: Northamptonshire hoverfly Reply with quote

Attach a presumed hoverfly taked 19-07-2007 at light at the kitchen window. Can anyone help with i.d. please. Photo attached.
Jim D.
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John O'Sullivan



Joined: 05 Oct 2005
Posts: 128
Location: Sandy, Bedfordshire, UK

PostPosted: Thu Jul 26, 2007 9:59 pm    Post subject: Reply with quote

Hi Birderfirst,

A good, clear picture, and I reckon that it is Eristalis tenax. Eristalis species look like Honey Bees, and tenax even has a false pollen-basket on the hind legs (visible on the right in your shot). The front and middle feet are partly dark, which rules out the similar Eristalis pertinax.

Interesting to get it coming to light.

Happy hunting!

John
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Tony White



Joined: 12 Mar 2006
Posts: 61
Location: Byfield, Northants

PostPosted: Tue Jul 31, 2007 7:05 pm    Post subject: Reply with quote

Hi Birderfirst,

I agree with John; Eristalis tenax. It is just possible to see that the hairs on the eyes form vertical stripes. Also, there is a faint, but quite noticeble, pattern on the thorax. Other Eristalis spp may show a pattern, but not, in my experience, quite as clearly.

Tony White
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