Climate change and the Death's Head Hawk Moth

Bossman brought me a present this morning. He was raking leaves beneath the Mastic tree and found this poor beastie. According to my book, they are usually Summer visitors from Africa that sometimes overwinter here in the pupal stage. According to this site, they are common throughout Europe, so take your pick. I am guessing that this specimen had been fooled by the temperature being in the high 20's for a couple of days, followed by a sharp drop to only 5ºC. It had struggled out of its underground cocoon, but had not been able to plump up it's wings.
This is the first time I have seen one close up. They are usually night flyers, large enough to be mistaken for a bat. They have every opportunity to breed in the garden, as we are well stocked with Bignonia and Lantana as well as numerous cultivated and wild plants of the potato family. My only worry is that Ivan the Bulgarian intends to lay black membrane under the gravel he and Bossman have planned for the area between the almond and the barbecue. The mesh fencing there is covered in Bignonia and Blue Potato Vine. If any more moths are pupating underground, they may never see the light of day. Not to mention the Spiranthes spiralis and the Anacamsis Coriophora that come up every year....Bugger these men and their need for tidy gardens!