Brecks

The days building up to this Breckland jaunt brought rain, and lots of it however for our outing only a light shower or two were forecast.  David got to mine shortly after 10AM and we were soon travelling down the A11 towards Thetford and our first site of the day.  Our first location was a fairly large SSSI that brought a mixture of calcareous and acidic Breckland grassland heath with scattered parcels of Oaks and Pine plantation.  A quick walk round and we soon found an appropriate area to try for our first target – the Yellow-legged Clearwing.  A VES lure was placed on top of an Oak stump and a thankfully brief wait begun - it only took a few minutes for the first of four males to investigate.  Visits were brief and only one hung around for pictures.  We failed to find the next target, the Orange-tailed Clearwing when we were unable to find any Wayfaring-tree or Guelder Rose.  As we walked around the site we couldn’t help but notice large numbers of the tiny migrant micro moth Plutella xylostella in the long grass with the odd Painted Lady disturbed too.  Before lunch we played a quick visit to a small chalkpit in a secluded part of the Suffolk Brecks – here Military Orchids grew at their only East Anglian site alongside Common Twayblade and Pyramidal Orchid.  After lunch we visited Cranwich Camp – several Proliferous Pink plants in the car park and the Nationally Scarce B Crambid Thisanotia chrysonuchella was a common sight as soon as we entered the grassland.  Without doubt the highlight from this site was the vast amount of Spanish Catchfly with 100s of plants in one scraped area.  In the southwest corner by some Kidney vetch a Small Blue Butterfly basked in the sun – the first to be recorded in Norfolk for nearly 100 years (albeit of suspect origin)! Following another short drive we relocated nearer to Brandon and took a stroll along the River Little Ouse and keeping a careful eye on the Comfrey.  Despite this plant being the main food source for our next species we actually found three specimens of the black and white micro moth Ethmia quadrillella resting on Nettles.  Whilst I was on the phone David found another National Scarce B micro moth in the riverside vegetation - Nemapogon koenigi.  Our final stop of the night was another piece of Breckland grassland and we decided to stick a mercury vapour moth trap out for a few hours.  For our efforts we were rewarded with two stunning Cream-spot Tigers as well as several Barred Reds, Satin Waves and Clouded Buffs.  On top of all the moths roding Woodcock, churring Nightjar and a brief Long-eared Owl made a fine finish to a top day.

Yellow-legged Clearwing (Synanthedon vespiformis) - a fairly common species across Norfolk and one that requires young Oak stumps for breeding.  Image (c) David Bratt

Military Orchid (Orchis militaris) - East Anglia's only population grows in a secluded chalkpit in the Suffolk Brecks.

Small Blue Butterfly (Cupido minimus) and it's footplant Kidney Vetch (Anthyllis vulneraria).  Back in Norfolk after a long period of absence but with a questionable origin.

Spanish Catchfly (Silene otites) - a Breckland specialty and a species that thrives from bare ground. 

Powered Grass-veneer (Thisanotia chrysonuchella) - a notable: Nb day flying micro moth that is restricted mainly to the Brecks.

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