Monday 22 July 2019

Ashridge Bioblitz

On Saturday evening Peter Hall and I ran four MV lights on Steps Hill, Bucks to get some moth records for a Bioblitz being held by the National Trust on the Ivinghoe hills the following day.  Even though the temperature dropped more quickly than expected it was quite a reasonable three-hour session with 177 species identified so far (104 of them macro-moths) and a few more micros in pots still to be determined.  As expected, amongst the many common species there was a fair selection of moths typical of chalk grassland habitat including Barred Rivulet, Pretty Chalk Carpet, Fern, Haworth's Pug, Rosy Minor and Small Purple-barred, although we failed to see Chalk Carpet which ought to be around there at the moment.  New species for the year included Small Emerald and Straw Underwing, while there were unusually high numbers of some odd species including Dark Umber (40) and Brown-line Bright-eye (65).  What I hoped might be a small Cochylidia species (shown below) in fact turned out after dissection to be Falseuncaria ruficiliana.

Falseuncaria ruficiliana, Steps Hill 20th July

Small Emerald, Steps Hill 20th July (photo:  Peter Hall) 
 
Rosy Minor, Steps Hill 20th July

Dave Wilton
Westcott, Bucks      

4 comments:

  1. Which trap of yours was it in, the Cochylidia looks interesting. Heydeniana perhaps?

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  2. I had two of them in the Skinner. Heydeniana is what I was thinking of (and we have a few records from College Lake which is quite close by) but Adam's suggestion is a possibility too.

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  3. Following dissection it actually turned out to be Falseuncaria ruficiliana which is reasonably widespread on chalk grassland in the Chilterns.

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