on A general level, the consolidation of the species present in the historic centers such as pigeons, swifts, blackbirds and starlings, flanked by two trends: a positive one, that sees a clear expansion of the wood pigeon, the other negative regarding the sparrows (plaice european plaice of Italy), whose populations, on average in the past 10 years, are halved.
To evict the latter species from the suburbs it is above all the consumption of land for urban use. The increase in peregrine falcons may be, at least in Italy, a direct result of the growth of pigeons, wood pigeons, and the presence of starlings, of which the hawk is a predator. "In our city - is confirmed by Marco Gustin, ornithologist responsible for species and research to the Lipu - are now settled in several pairs of peregrine falcons. With a little patience and attention, you can see them go hunting in the "dorms" of starlings. The shapes of their flocks, that so fascinate us in the sky, I'm just a defense system of transfers from the hawks".