http://www.birdguides.com/webzine/article.asp?a=2304 a few tips from birdguides
When I left home the temp was 12 degrees as we set the trap up the temp was a very cold 6........only one Ypsolopha ustella braved the cold night.Many thanks to Bri and Elena for there help.
Northowram was a bit better with 5 large Yellow Underwing,1 Blairs Shoulder Knot,3 Autumn Green Carpet and 2 Black rustic............The temp at Northowram was 7.???
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A useful article that Andy - it's rejuvinated my quest to photograph one of those flightless females crawling up trunks after dark - my local dusking site at Bankhouse wood could be just the spot!
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