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current posts

 
Mon 1st December 2008 20:59 by Ian Mathieson
Moth Numbers in 2008
I was very interested in James' entries last month about the numbers of moths that he had recorded this year. My impression was that this year, although not a classic year, was a huge improvement on 2007.
I sometimes think that I am more interested in the maths than the moths and I thought I would compare my totals, over a 5 year period, in a garden 20 miles away from Taunton with those that he has given. There is a suprising disparity between the two sets of figures. I have listed them in numerical order with the most numerous at the top of the list.

  • Setacious Hebrew Character -221 individuals on 5 yr average -11%
  • Heart and Dart -1151 / - 77%
  • Large Yellow Underwing +30 / +2%
  • Common Wainscot -95/ -13%
  • Common Footman -233/ -48%
  • Dark Arches -243/ -57%
  • Lunar Underwing -316/ -90%
  • Square Spot Rustic +223/+69%
  • Straw Dot -42/ -18%
  • Brimstone +14/ +7%
  • Dingy Footman +51/ +34%
  • Uncertain -103/ -77%
  • Vines Rustic +46 /+35%
  • Shuttle Shaped Dart +105/ +105%
  • Green Carpet +6/ +8%
  • Jersey Tiger - only one ever seen in my garden

Assuming I get a December Moth before the end of the year I will end up with about 248 different Macro species. This compares to a high of 272 different species in 2004 and a low of 231 in 2007.

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