Naming
''P. sicula'' contains dozens of subspecies. The current distribution patterns of the subspecies have been interpreted as the consequence of natural events, including regional glacial refuges and postglacial area expansions, and multiple introductions by man.
Habitat
Its natural habitats are temperate forests, temperate shrubland, Mediterranean-type shrubby vegetation, temperate grassland, rocky areas, rocky shores, sandy shores, arable land, pastureland, plantations, rural gardens, and urban areas.References:
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