The beauty of Cowberry is that it is an evergreen and therefore easily distinguished from Bilberry at this time of year.
On Wednesday 2nd February 2011, I climbed up to my favourite Cowberry patch on Barden Moor to look for the hibernating larvae of Olethreutes mygindiana.
I soon found a couple of hibernacula consisting of spun-together leaves and each containing a solitary reddish brown 5-6mm long caterpillar.
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