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you should be able to breed the larvae through to adult from your eggs. I'm not sure of the foodplant in France but in the UK the larvae will feed quite happily on Bramble. They will probably take 14 to 15 days to hatch.
Joint Macro-moth recorder for Bedfordshire, VC30
Sorry - didn't scroll down enough to see this entry, so added an id to the other one - Saturnia only, not specifically pavonia, though I am not necessarily upto speed on the lumping/splitting of this pair.
On what basis is this specifically S pavonia?
I was going by firstly the shape of the margin (ternen)of the forewing as illustrated in Robineau (Guide des Papillons nocturnes de France) and the shape and width of the white part of the forewing margin (in Leraut)plus the geographical range as pavoniella is a southern species in France with not too large an overlap region with pavonia and as far as I was aware Deux Sevres (just SE of Nantes)is futher north than the usual range of pavoniella. (using Leraut Moths of Europe and description of ranges in Robineau). Robineau also says that recent studies permit the restoration of pavoniella as a distinct species (if my french translation is up to it!).
I am happy to be corrected as my knowledge of French species is limited to the books.
I am always a bit bewildered about the type of phrases that Leraut in particlar uses: "narrower wings", "wider margin" and "more sinuous" - fine when looking over dozens of specimens, but a bit tricky when dealing with only one. He does, however, question the degree of knowledge about the northern limit in France.
I tried the various separation features on Tony Pittaway's pictures and was left scratching my head.
I knew there was something else...
The report from the 3rd European Moth Night available from:
(though at a very slow transfer rate with possibly a corrupted PDF!)
has some stuff about the 2 species, including id pointers; however, these are based on the hindwing pattern and the colour of the female's abdomen, neither of which are visible in the photograph.
Lat/Lng: 47.0, 0.4