Thecla betulae – Brown Hairstreak. Particulary : Looking for eggs in the winter in order to map the species http://www.schmetterling-raupe.de/art/betulae_e.htm
Thecla betulae, Brown hairstreak .This butterfly seems to be quite rare, but I was able to find eggs everywhere when I looked for them during the winter. Pics of the butterfly, caterpillar .
Since I have been looking regulary for the eggs during