I think its actually an italian wall lizard but 3 lizards on one wall photographed within a few moments and each with a completely different pattern but I presume same species
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Only 2 possibilities given the location and pattern. It does look like sicula, but I don't think this species has the dark marks on the throat seen here, which makes it the Common Wall Lizard P. muralis (a heavily-marked male). Also, sicula in N. Italy would be more streaked (subsp. campestris). The form of P. muralis in N. Italy (subsp. maculiventris) is known to be heavily marked (rather than having the usual vertebral stripe), including the underside. With lacertids being so variable, I can't be sure, but I think it's worth a 2nd i.d. as a suggestion.
Good point about the throat markings. If I manage to get back there I may try to flip one over to see the underside too.
From my experience the two wall lizards are nasty animals to separate, they are so variable. In fact all of these small lizards can be difficult, just see some of the photos of common lizards on iSpot.
I would plump for common wall lizard in this case because the heavy marking does appear to continue onto the under-belly. This would be very unusual, though acording to Arnold, Burton and Ovenden (Collins Field Guide) not unknown especially in Northern Italy where the Italian Wall Lizard is more heavily marked!
The paler colouration and pale line down the side of the animal on the right indicates it is a female.
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A female in the process of moulting by the looks of it.
Definitely P. muralis as P. siculus lacks the throat markings of these animals. Also P. siculus with this type of pattern only occur on Sardinia, Corsica and Sicily. P. siculus from the area of the sighting are generally more uniform green on the back
I would add that the subspecies nigriventris also from Italy can have similar markings. I'm not sure of the range of this and maculiventris, so not 100% sure which subspecies it would be.
Checked the range and this is within the range of P.m. nigriventis and not P.m. maculiventris.
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