Great find with the Marbled White - I've not seen one for a few years now. I think it's an Azure Damselfy rather than Common Blue - the 'U' marking on the first segments are an easy to see guide.
Hello Ian,
The Marbled Whites in Wingate Quarry were introduced nearly a decade ago as part of a University Experiment on the effects of Global Warming. The same year Small Skippers were introduced into a quarry in the Belford area of north Northumberland. The latter species is no longer separated from the natural population which has expended to encompass the Belford area.
The Marbled White however, is still more or less confined to Wingate Quarry, with just the odd straggler being reported from adjacent tetrads. This latter species is now quite common in Yorkshire, so hopefully it will eventually expand naturally into Durham.
I must admit, that being particularly interested in the records of the distribution of (both historical and modern) of butterflies in Northumberland & Durham, that the artificial introduction of species into these counties without any consultation with local entomologists at all, should be regarded as being nothing less then damned disgracefull.
The enterprise as I understand it, was only funded for a couple of years and then dropped. Hardly a reasonable time for any scientific investigation or result to be completed or ascertained.
There are no historical records of the Marbled White ever being recorded in Co. Durham or further northwards.
I can just imagine what the Birders would feel, if some 'prat' introduced an alien bird in some numbers, e.g. An Egyptian Vulture into either county.
Harry