The flocks you saw (if you're in northern Italy) are of Sturnus vulgaris (common starling) that probably came here to spend the summer months and now gather on perches where, when their biological clock "will give them the go", they will return to southern Italy and perhaps also in North Africa to winter.
They are not considered as a real migratory species (as instead is Hirundo rustica, the common swallow) but not even sedentary, but they are a good middle ground.
Here are some photos of the protagonists of this migration of the last days that is still repeating today, with latecomed individuals or probably from central-northern Europe.
Furthermore, the "bombardment" with their passage is due not only to their physiological needs but also to a lot of seeds.
Post scriptum, for complete information: their wintering areas include (in addition to northern Africa and southern Italy) also Corsica, Sardinia, Spain, Portugal and the Near East.
For more information regarding this species, I provide the IUCN Red List link (International Union for Conservation of Nature): https://www.iucnredlist.org/species/22710886/87847984
They are not considered as a real migratory species (as instead is Hirundo rustica, the common swallow) but not even sedentary, but they are a good middle ground.
Here are some photos of the protagonists of this migration of the last days that is still repeating today, with latecomed individuals or probably from central-northern Europe.
Furthermore, the "bombardment" with their passage is due not only to their physiological needs but also to a lot of seeds.
Post scriptum, for complete information: their wintering areas include (in addition to northern Africa and southern Italy) also Corsica, Sardinia, Spain, Portugal and the Near East.
For more information regarding this species, I provide the IUCN Red List link (International Union for Conservation of Nature): https://www.iucnredlist.org/species/22710886/87847984
These pictures were taken in northern Italy.
