Blue-spot Hairstreak (Satyrium spini)
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2019 photographs highlighted in yellow. Click on any photograph to go to an enlarged picture, or simply scroll down the page.
Quite reclusive and often sedentary, so can often be missed. Until 2006 I had seen only single individuals at altitude locations (around 1000m or more) in the Vercors National Park, at the Col de Vars and in the Alpes-Maritimes. However, in June 2006 I found fifty or more at a lowland location in Var and since then in good numbers at other locations. Probably this is because I had not visited lowland areas of southern France in June before, and was only seeing the later emergence at altitude. It is superficially similar to the White-letter (S. w-album), the Ilex (S. ilicis) and the Sloe Hairstreak (S. acaciae) but the strong straight white line and the blue spot near the base of the unh are unmistakable.
It is also appreciably larger and more triangular in shape, being a slightly greyer (as illustrated by 33693) and lighter ground colour than many of its Satyrium cousins. It also seems to me to be a neat and tidy butterfly.
The blue spot is not entirely blue - the close-ups show that it is around 70% blue scales on a black background. The close-ups of some of the w-album specimens also have small blue spots in the same place.
|33693||M||a male, taking honeydew from a leaf, quite a greyish ground colour.||680|
On studying the magnified image, the end of the foreleg appears to be articulated and identical to the mid-leg and hind-leg and not hooked, which confirms that this is a female.
clearly a female, based on the visible body shape.
I had labelled this a female, possibly based on behaviour I saw in the field, but looking only at the photograph, the sex is not clear.
|45179||?||the end of the foreleg is not visible so it is not possible to say whether this is a male or a female.||200|
|44463||?||the end of the foreleg is not visible so it is not possible to say whether this is a male or a female.||1550|
|46451||?||the body shape is visible but I am not sure whether it is large enough to suggest that 46451 is a female. The ground colour is a rather cold grey-brown and the white line, of the unh in particular, is very wide by the norms of this species.||680|